HECO_ESIM_7th_Edition(2)

March 25, 2018 | Author: Christopher J Lovett | Category: Electric Power Industry, Telephone Exchange, Hawaii (Island), Transformer, Concrete
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Electric Service Installation ManualA guide for successful installation of residential, commercial and industrial electrical services. SEVENTH EDITION Hawaiian Electric Company Hawaii Electric Light Company Maui Electric Company Electric Service Installation Manual Hawaiian Electric Company Hawaii Electric Light Company Maui Electric Company Seventh Edition i ii . Inc.ELECTRIC SERVICE INSTALLATION MANUAL Seventh edition First printing: January 2012 © 2006 Hawaiian Electric Company. All rights reserved. ....5 Instrument Transformers ..........................................8 Service Drop Attachment .............................................8 Location of Overhead Services ...............................................................6 Net Metering.................................22 Trenching and Backfilling ...........................................................................................................................................................................................................................................................................12 Swimming Pool Clearances for Utility Service Drop ...................................21 Underground Service from Underground ...............................................................10 Methods of Attaching Service Drops ..................................................................................................6 Chapter 2: Overhead Service.................................................................................2 One-Call System ....4 Locked Areas ......................................................................................................................................................................................................................................................................................................................................................................... 2 kV to 15 kV Service...................................5 General Service Requirements......................................................................................................................................................................6 Parallel Operation ........................................................................................................................................6 Closed Transition Switching...................20 Underground Service from Overhead...............................................15 Chapter 3: Underground Service ..........................................................................................................23 Marker Tape......5 Equipment Furnished by Customer..........19 General ..........................24 iii .........................3 Tampering .......................................................................................................................................4 Two or More Buildings on One Lot ..........................................23 Underground Utility Duct Separation ............................10 Service Entrance Conductors ..............................................................................................................................................................................................................................................................................................................................................................................13 Temporary Service ...............................................................................................................................................................................................................................................................8 Service Drop ...............................................................4 Easement Areas ...........................................................................................................................................................................................Contents Chapter 1: General Requirements ..................................................................................................5 Drawings......2 General .............................7 General ..........1 About This Book ......................................................................................................5 Switchgear Bus..........24 Concurrently Installed ......................... ...........................................................................................................................................................43 Meter Location .......... Pedestal...................................29 Clearances Around Padmounts Transformers ...........25 Temporary Service.......42 Conditions for Energizing ................................................................37 Chapter 4: Metering .............................................................................................................................................................................65 Commercial Service ..........................................64 Residential Service.......................................................................................................................................59 Conductors ..67 Meter Centers .................................58 Meter and Main Service Disconnect Configuration ....................................................................41 Introduction.......................................63 Replacing an Existing Meter .............................................................................................................................36 Handholes and Manholes ......24 Recessed Conduit in Walls ........ and Other Enclosed Areas .............................................................................................................56 Free-Standing Steel-Post Structure .........................................................24 Splice Can..34 Underground Construction.......................................................................42 General Information .............. Meter Closets............................................................................................................. Metering Equipment ...................................................................................................64 Sub-Metering..........................................................................70 Meter Mounting Heights ..........................................29 Customer Responsibilities ...............................................................................................................................................................62 Bollards .........................................................................................................................................................................................................................................................................36 Retaining Walls................................................46 Electrical Rooms.................................................................61 Switchboard and Switchgear General Requirements .64 Self-Contained Metering (0 to 600 Volts).........................................................................61 Meter Sockets ..........................42 Power Company Responsibilities ......................................................................................................................................................................................................................74 iv ..............................................................29 Location ..............................................47 Freestanding Meter Enclosure..................................52 Freestanding Meter Enclosure .......................................................................64 Sealing of Meters......................................................................................................................................................................... and Steel-Post Structure ....................................................................................................................................................................................................................53 Free-Standing Meter Pedestal........................42 Customer Responsibilities .43 Clearances Around Meters .........................................................................................................65 Manual Circuit Closing (MCC) Bypass and HQ Sockets................................................................................................................63 Keep Unmetered Conductors Separate............ELECTRIC SERVICE INSTALLATION MANUAL Independently Installed ..............25 Transformer Pads...............................67 Grouped Meter Installations .................................... .........................................................................................111 Street Lighting ...................................................110 Residential Customer Emergency Generators .................................95 Switching and Protection ..............................................80 High Voltage Metering (Over 600 Volts) .....112 Street Lighting From an Underground Electrical Source .......................................................................................................................................................102 Service Connection Configurations – Commercial Service 2 kV to 15 kV ........................97 Service Connection Configurations................................................................................. Primary Voltage ...................................................................................................................................................Metering With Instrument Transformers ..109 Design and Operating Guidelines.......74 Current Transformer-Rated Metering (0 to 600 Volts) ............112 Street Lighting From an Overhead Electrical Source ........................................85 Customer Generation ..............................................................89 Chapter 5: Other Requirements ...................................................................................................83 Remote Interrogation Via Telephone...75 Meter Mounting Heights (Up to 600 Volts) .............................................................80 Primary Metering on a Power Company Pole..............105 Utility-Owned Switchgear........................................................................................84 Totalized Metering – Commercial and Industrial.....83 Pulse Metering Output (KYZ Output) ..................................................................................................97 Protective and Controlling Equipment – Commercial Service 2 kV to 15 kV.................................................83 Specialized Metering ..................................................................................115 v ...........................................86 Service Entrance Grounding and Bonding .......... Added minimum/maximum height of service mast. Chapter 2 Overhead Service Chapter 3 Underground Service Chapter 4 Metering Chapter 5 Other vi Hawaiian Electric Co. Added requirement of two ground rods on temporary overhead service for HELCO. 100911. Revised Handhole. Ltd. Added temporary service on future wall not allowed for MECO. Revised Figure 4-23 and added notes for MECO only. Clarified transformer pad details. Revised duct backfill notes. Added splice can requirements for MECO. Revised power company responsibilities for MECO and HELCO. Revised service drop clearance from doors. Revised Figure 4-27. Removed service entrance cable requirement for customer owned cables. Revised Figure 4-18 Revised notes for Meter Centers not accessible to pedestrians. Inc. 5-10. 5-11. 100900 and 101028. . 5-5. windows and landings.ELECTRIC SERVICE INSTALLATION MANUAL . Inc.. Added splice can note for MECO. Added temporary service stand not allowed for HELCO. • Hawaii Electric Light Co. Added note... Added notes on Free Standing Steel-Post Structure for HELCO and MECO. Added note for traffic rated structures in State Right Of Way. Revised Net Metering Contacts for MECO and HELCO. Added note for concrete slab under meter pedestal. 4-29 Added NEC note for Figure 4-32 Revised Figure 5-4. Added 75-750KVA transformer pad detail for MECO only.SEVENTH EDITION Significant Changes To This Edition Chapter 1 General Requirements • • • • • • • • • • • • • • • • • • • • • • • • • • Added MECO and HELCO only notes throughout manual. 100927. • Maui Electric Co. Free Standing Meter Pedestal not allowed for HELCO. Vaults and Manholes Type and Description for Drawings 100930. Added notes and bullets to specify customers load cables shall not pass through electric company’s sealable designated sections or compartments. CHAPTER 1 General Requirements 1 OTHER METERING UNDERGROUND OVERHEAD GENERAL . Maui Electric Company. Inc.. owners. federal and state laws including those of the Occupational Safety and Health Administration (OSHA). to scale 2 Hawaiian Electric Co. Required product references: Meter elevation diagram Single-line diagram Plot plan. home owners. The installation of a new electric service is a cooperative effort between the customer and the power company. architect. To request electrical service. • Hawaii Electric Light Co. Rate schedule desired. tax map key.ELECTRIC SERVICE INSTALLATION MANUAL . Electric Utility Service Equipment Requirements Committee (EUSERC). Inc. the terms "power company. For example: address. and consultant.. The purpose of this manual is to identify the responsibilities of each party. Mailing address of the applicant. and the National Electrical Safety Code (NESC)." "electric utility. contact the applicable company. subdivision. developers. etc. the National Electrical Code (NEC). It is published jointly by Hawaiian Electric Company. The purpose for the service. and social security number of the applicant. Ltd. . lot number. and architects. Include a description of the equipment. contractors. The date the applicant will be ready for service. and load. • Maui Electric Co. applicable ordinances of the respective counties. Business address. testing. Contact the power company early. occupation. Be prepared to provide this information: • • • • • • • • • Name(s) of the applicant. and Hawaii Electric Light Company for use by engineers. also dates for construction power. For commercial developments. if an optional rate schedule is available. Location of the premises. Whether the applicant is the owner. See Figure 1-1 for contact information. district.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER About This Book Electric Service Installation Manual describes requirements for new electric services and metering. of premises. General In this manual. electrician. Service installations must meet the latest requirements of the power company. when requesting electric service. agent. the Division of Occupational Safety and Health (DOSH)." and "utility" refer to the same thing – your local electric power company. and permanent service.. desired voltage. tenant. Before digging near any utility facilities. Box 398 Kahului.. Kamehameha Avenue P. if required • Required for commercial services: Four copies of the meter equipment drawing showing switchboard. call Hawaii’s One-Call Center at 1-866-4237287. Building elevations showing power company facilities. For information on Hawaii’s One-Call System. switchgear. Box 2750 Honolulu. Hawaii 96840 Phone: (808)543-7070 Oahu Maui Electric Company Lanai Engineering Department 210 W. Hawaiian Electric Company Customer Installations Division 820 Ward Avenue P. Power company service areas. Inc..org.. pedestal or steel post structure. 3 Hawaiian Electric Co. Hawaii 96740 Phone: (808)327-0510 Maui Hawaii Electric Light Company Customer Engineering . Hawaii 96732 Phone: (808)871-2390 Hawaii Electric Light Company Customer Engineering .Load calculations . Hawaii 96720 Phone: (808) 969-0311 Hawaii Figure 1-1.Hilo 54 Halekauila Street Hilo. complete and submit a Request For Electric Service. Ltd.O. or advice with regard to specific projects requiring electric service. interpretation of requirements.Kona 74-5519 Kaiwi Street Kailua-Kona. visit www. Inc. and the manufacturers’ design drawings of the switchboard/switchgear in reference to EUSERC drawings. GENERAL GENERAL REQUIREMENTS ..O. • Maui Electric Co. for large residential customers. In addition.callbeforeyoudig. Power company representatives are available to provide additional information. Layout and positioning of meter enclosure (front and rear views).Civil and mechanical drawings. meter pedestal. • Other information as the power company might reasonably require. OTHER METERING Molokai UNDERGROUND One-Call System OVERHEAD - Meter room location layout. subdivision and commercial projects. • Hawaii Electric Light Co. unless otherwise specified by the power company. If the room containing metering and related equipment is accessible to both the utility workers and the customer. 708-826. the requirements described below must be met: • Areas locked by the customer must be protected by doors or covers. The customer-owned key will operate only that lock and will not open other locks operable by the utility's master key. • • Easement Areas Construction is not permitted on an easement or access “granted” to the power company. Ltd. or 708-827. Locked Areas Readily accessible. or other enclosed areas which are locked by the customer. for metering facilities and other equipment owned by the power company. and make arrangements satisfactory to the utility for continued access by its workers. Inc. • Maui Electric Co. Because easement dimensions vary. but where two or more customer/utility master locks may be required. the customer instead supplies an accessible location for a utility key-box (Supra-S Key Box or equivalent). When metering facilities or other equipment owned by the power company must be located in vaults. unlocked spaces are strongly preferred.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER Tampering Tampering with power company property is a criminal offense prosecuted under Hawaii Revised Statutes 269-71. rooms. The judgment may require payment of triple damages. The power company will supply and install the padlock or core. • Hawaii Electric Light Co. 4 Hawaiian Electric Co.ELECTRIC SERVICE INSTALLATION MANUAL . If the customer plans to make modifications or additions which would render the metering facilities or other equipment inaccessible. Inc. fitted with a hasp which will accommodate a padlock or cylinder lock which will accommodate a Best Universal Lock Company cylinder. the utility will also supply a core or padlock which will accommodate a utility master key and a customer-owned key. Doors leading into such areas must be arranged so as to be readily opened from the inside by any person who may be inside the area. and a master key to all access doors along the route to rooms that contain power company equipment and to doors to rooms containing both customer and utility equipment. similar to the arrangement for access doors... In situations similar to the paragraph above. the customer must consult with the power company before making such modifications or additions. if construction is planned near easements. consult with the utility early. . 708-825.. in accordance with the egress requirements of the latest edition of the National Fire Protection Association Life Safety Code. The customer furnishes the key-box. General Service Requirements. and not METERING UNDERGROUND GENERAL GENERAL REQUIREMENTS . Include one-line and schematic diagrams showing: • • • • • For protective and controlling equipment: the type.400 volts or more. The minimum spacing. potential transformers Fuse sizes and locations Meter panel layout Incorporate the power company’s comments from the review process before the drawings are used to manufacture the equipment.. type. the bus between the utility's service termination and the customer's protective equipment must be fully insulated for 15 kV. Ltd. Drawings The customer submits four copies of the drawings. is not less than 7-1/2 inches between phases. The controlling equipment must be readily accessible to and operable by power company workers at all times. Equipment Furnished by Customer The customer furnishes.. size. as measured from the outside surfaces of the cables or bare bus. Do this before proceeding with the electrical wiring of the buildings. Inc. and all necessary transforming equipment. Additional requirements for temporary service are contained in the utility’s tariff. Customer equipment must not be connected ahead of the utility’s meter. Inc. For services greater than 5.000 kVA. Other Requirements. and latch For relays: the style. and ratings for normal current. and maintains all protective and controlling equipment. consult with the power company to determine acceptable locations for service attachment and metering. the lock shall conform to requirements indicated under Locked Areas or Equipment. for service connection configurations. delivered at a nominal voltage of 2. Include drawings for protective and controlling equipment. load break. interrupting and fault-close.000 volts. but not more than 15. Switchgear Bus OTHER When the power company’s service terminates in the customer's switchgear. and the revenue metering compartment and equipment.Two or More Buildings on One Lot If more than two dwellings or buildings are located on the same lot. • Maui Electric Co. installs. and proposed settings Location and ratio of customer's instrument transformers. 2 kV to 15 kV Service OVERHEAD 5 Hawaiian Electric Co. See Chapter 5.. See Closed Transition Switching (see below) for metering information. consult with your power company for the requirements. except for instrument transformers used by the power company for revenue metering.000 kVA or less. When controlling equipment is in a locked area. • Hawaii Electric Light Co. This section covers permanent electric service of 5. Switching and Protection. Inc. Net Metering If net energy metering is being considered. See Chapter 5. The length of bus between the service termination and the protective equipment must not exceed 6 feet. Ltd. the customer must apply to the utility for permission. This prevents the inconvenience of momentary service interruptions during planned switching by the utility for maintenance or other purposes..com HELCO Engineering Department. Hawaiian Electric Company Telephone: (808)543-4760 MECO contact: Stefanie Tome Renewable Energy Department. Closed Transition Switching For customers with two services and circuit breaker protective equipment. Instrument Transformers Instrument transformers which are used by the utility for revenue metering.com. Parallel Operation When the customer plans to operate generators in parallel with the utility's system. The requirement for insulated bus will be waived for services of 100 amps or less. contact your local power company to discuss the requirements.helcohi. Note: To help ensure public safety and the safety of power company workers. Inc. Other Requirements. the preferred configuration allows the utility to transfer the customer's load from one service to the other by closed transition switching.. HECO contact: Kevin Kuo Customer Technology Applications Division. and discuss the requirements for parallel operation. not open transition switching. HELCO only: Refer to website www. • Hawaii Electric Light Co. when it is connected to the utility’s system and fused by the utility. for additional information. • Maui Electric Co. are not available for use by the customer. customers must register their generating system with the local power company by executing a Net Energy Metering or a Standard Energy Interconnection agreement.ELECTRIC SERVICE INSTALLATION MANUAL .helcohi.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER less than 6 inches from phase to ground or to the nearest un-energized surface. Maui Electric Company Telephone: (808)872-3258 HELCO contact: NEM Call Center HELCO website: www. Hawaii Electric Light Company Telephone: (808)969-0358 6 Hawaiian Electric Co.. . OTHER METERING UNDERGROUND OVERHEAD 2 GENERAL . • Hawaii Electric Light Co. • Maui Electric Co. Inc.CHAPTER Overhead Service 7 Hawaiian Electric Co.... Inc. Ltd. • Hawaii Electric Light Co. 8 Hawaiian Electric Co. 2-2 and 2-3. etc. at its expense. see Figures 2-1. Installed where the weatherhead and point of attachment are safely accessible. flood lights. Readily accessible for installation. The customer or contractor must obtain approvals from the city and/or county prior to energizing service. masts. which do not ordinarily support conductors and on which men can walk) whether attached or unattached.ELECTRIC SERVICE INSTALLATION MANUAL . Service drops must be installed at heights and locations such that the service drop conductors are: • • • • • Running free of obstruction from trees. antennas. provided such support is of a type acceptable to the utility and complies with all applicable ordinances and requirements. structures. a lateral and horizontal clearance of at least 3'-6" is required between the supply conductors and nearby buildings. inspection and maintenance. to the customer’s approved point of attachment. Supply conductors of 0 to 750 volts must have a vertical clearance of at least 8'-0" above buildings and bridges (or other structures. For supply conductors of 0 to 750 volts. • Maui Electric Co. vents. Attached at only one point on the building.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER General Overhead services will not be supplied to any building or premise in an area where city and/or county regulations require that services be underground. Service Drop The power company will. Substantially supported at the building. Ltd.. Inc. . Inc. and on which people might work (except generating stations and substations). The utility will connect to the service entrance conductors. bridges.. poles. or other structures to which the supply conductor is not attached. See the NESC. Service Drop Attachment For the location of the service drop attachment.. furnish and install a single span of service conductors from its pole or other aerial support. walkways. Service drop clearances from windows. stairways. UNDERGROUND OVERHEAD GENERAL OVERHEAD SERVICE . balconies. • Hawaii Electric Light Co. See also: NESC. Outside of building Figure 2-2. Ltd. No service drop in this space 5'-0" min. doors and other points at which human contact might be expected.. a horizontal distance of at least 5 feet as shown below. Inc. 5'-0" min. 9 Hawaiian Electric Co. OTHER METERING 5'-0" min. windows. Inc. etc.. Figure 2-1. 5'-0" min. Outside of building 5'-0" min. 5'-0" min.Service drops must be installed so that they clear fire escapes. • Maui Electric Co. exits. No service drop in this space 8'-0" minimum 5'-0" min. 5'-0" min. Service drop clearances from doors.. ... conduit. All service locations are subject to the power company’s approval. All conduit. easement. Methods of Attaching Service Drops The power company: • • • Designates the location of the service mast. Supplies the insulator and hardware for attaching the service drop at the customer’s mast. • Hawaii Electric Light Co. • Maui Electric Co.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER Location of Overhead Services The preferred service attachment is on the corner of the residence. the point of attachment for the service may be located near. masts. and installed within four feet from the front corner of the residence.ELECTRIC SERVICE INSTALLATION MANUAL . See also minimum height requirements. If overhead lines are along the rear property line. 10 Hawaiian Electric Co. Street. Pole line Driveway Acceptable service attachment locations. Ltd. The side from which the meter is to be served shall be designated by the power company. not more than four feet in either direction from the corner. Inc. 4'-0" Garage Preferred service attachment location 4'-0" Property line Residence Property line Figure 2-3. Makes the tap at the service drop conductors. and hardware must be rigid galvanized conduit. or at the rear corner of the residence. etc. Masts. and other equipment must be grounded and bonded as required by the latest edition of the NESC. Inc. Location of overhead residential services. and the minimum height above ground for the point of attachment of the service drop. alley. The conduit and wiring necessary to connect the point of attachment to the meter must be provided by the customer. . . External mast attachment. See Figure 2-5 for mast height requirements. OTHER METERING Note: For an overhead service mast within the wall. • Maui Electric Co. Inc. please contact your county’s electrical department for requirements. Figure 2-4. Inc...All structures must be able to safely support workers and equipment required to make the connections. UNDERGROUND 22" spacing between heavy duty pipe straps OVERHEAD GENERAL OVERHEAD SERVICE . 6" min. Centerline of load Exterior installation 11 Hawaiian Electric Co. Ltd. • Hawaii Electric Light Co. 90° Mast Gu y Guy attachment. 8'-0" max. Service Entrance Conductors The customer’s service entrance conductors must be long enough to reach the service drop tap. Flashing and collar Consult company for when a guy is required Guy to be 3/16" wire rope. top view Weatherhead Pipe clamp with thimble eye for each guy 6" Service drop Service drop support by utility Minimum 2" rigid galvanized conduit without splice above roofing 4'-0" max. Figure 2-5. Conduit strap as required Watertight fitting Meter Meter socket Wall One 3/8" eye bolt through blocking for each guy with thimble eye. Maximum slope is 1 to 1. Inc. 12 Hawaiian Electric Co. plus an additional 18 inches for forming a drip loop. Waterproofing 1 1 2" x 4" blocking between rafters 18" min. • Hawaii Electric Light Co. • Maui Electric Co. Ltd. Alternate methods for attaching service drops using guyed mast installed through roof.. .ELECTRIC SERVICE INSTALLATION MANUAL . nut and washer Note: Other utilities are not permitted to attach to the service mast.SEVENTH EDITION 2'-6" min.. Inc. Service drop tap 18" s lead min.. GENERAL OVERHEAD UNDERGROUND METERING OTHER Gu y 60° . The drawings below illustrate the minimum clearances. OTHER METERING UNDERGROUND OVERHEAD GENERAL OVERHEAD SERVICE .. • Maui Electric Co.Swimming Pool Clearances for Utility Service Drop Where possible. • Hawaii Electric Light Co. Ltd. Swimming pool clearances for utility service drops.. avoid installing utility service drops above public and private swimming pools. 14’-6” minimum clearance from diving platform or tower 14’-6” minimum 22’-6” minimum clearance from water and edge of pool 22’-6” minimum clearance from water and edge of pool Pool deck 22’-6” minimum clearance Figure 2-6. Inc. when utility service drops are installed above swimming pools. Inc. Refer to the latest edition of the NEC for minimum height requirements. 13 Hawaiian Electric Co.. Inc. See Note 2. shall not be less than 12 feet 6 inches. . shall not be less than 10 feet 6 inches. Figure 2-7. Residential premise 12'* Clearance above other structure on premise. except that this clearance may grade (slope) from 18 feet. Service drop conductors shall have a vertical clearance of not less than 18 feet above public thoroughfares. 14 Hawaiian Electric Co.. Ltd. at a position not more than 12 feet horizontally from the curb line. which do not ordinarily support conductors and on which men can walk whether attached or unattached. Where within 15 feet of the point of attachment of either service drop. for further clarification. #8c.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER Customer's service entrance conductors connect to utility’s conductors Customer's service entrance conductors Attachment at building. 2. Center line of public road or highway * Refer to the NESC exceptions where the building height does not allow for these clearances.. Inc. Edge of curb or proposed curb. See Note 3. residential premises. 12' min. See Note 4. Refer to the NESC for specific conditions under which minimum clearances may be modified. See Note 1. 18' min. Refer to the NESC for futher clarification. Service drop clearances. Pole Property line drop ly service 0 volt supp 0 . The radial clearance between supply service drop conductors and communication service drop conductors shall not be less than 24 inches. The point of attachment of service drop conductors to a building. 5.30 16'* 16' min. Notes: 1. 18' min. shall be 8 feet. for residential purposes only. Private driveways or areas accessible to vehicles. Table 232-1. Refer to the NESC. this clearance may be reduced to 12 inches. Clearance Between Supply Service Drops and Other Conductors. 3. above areas or sidewalks accessible only to pedestrians. The minimum vertical clearance above structures. for further clarification. • Maui Electric Co. 4.. to a clearance of not less than 16 feet at the curb line. Refer the NESC and NEC 230-24(b). The minimum vertical clearance above private driveways or areas accessible to vehicles not exceeding 8 feet.ELECTRIC SERVICE INSTALLATION MANUAL . • Hawaii Electric Light Co. Refer to the NESC and National Electric Code (NEC) 230-24(b). For pole heights over 15 feet. METERING OTHER 15 Hawaiian Electric Co. Inc. this clearance may be reduced to 12 inches. 16' min. UNDERGROUND Notes: 1. consult with the utility’s engineering department. The radial clearance between supply service drop conductors and communication service drop conductors shall be not less than 24 inches. Ltd. 2. consult with the utility for additional requirements.Customer's service entrance conductors connect to utility’s conductors Customer's service entrance conductors Attachment at building. All materials must be for outdoor use. See NESC. Commercial industrial premises Area accessible to pedestrian only Private driveways or areas open to vehicular traffic Property line r op service d volt supply 0 . Temporary Service The customer furnishes a sturdy stand per power company standards. 12' min. 18' min. OVERHEAD 18' min. The minimum vertical clearance above bridges. Inc.. walls or other structures upon which people can walk.. Attach the wood brace at a point two-thirds of the height of the stand. • Maui Electric Co. All facilities must meet NEC requirements. Service drop clearances. For vertical clearance above buildings. above ground. Where within 15 feet of the point of attachment of either service drop. See Note 1.. 12' min. and locates it where specified by the power company. and secure the stand with bolts or nails. commercial premises. is 8 feet. • Hawaii Electric Light Co. If the stand is to be in service for longer than one year.7 50 16' min. GENERAL OVERHEAD SERVICE . All timbers may be rough. fences. Attach braces to the stand. Buried portions of stand and stake(s) must be treated and tamped. Pole Edge of curb or proposed curb Center line of public road or highway Figure 2-8. Service entrance cable Staple supports Approved meter socket (weatherproof type) 3/4" plywood mounting board 2" x 4" x 16' min. length and neutral identified. . pole 2" x 4" timber cross member brace Ground wire #6 SDBC Weatherproof GFCI outlet(s) with cover(s) Ground clamp 2" x 4" x 12' timber back support brace Note: All members must be one piece.56. 16 Hawaiian Electric Co. • Maui Electric Co. Soil areas: 2" x 4" wooden stake (driven into ground 2 ft. • Hawaii Electric Light Co. Ltd.ELECTRIC SERVICE INSTALLATION MANUAL . Inc. No splicing of timbers. treated timber Customer's service entrance conductors. If the ground connection is greater than 25 ohms. timber brace attach 2/3 distance up temp. Inc. Eye to point in direction of service drop.SEVENTH EDITION 5/8" x 8' ground rod 18" min. Temporary overhead service stand. the customer is required to install a second ground rod in accordance with NEC 250. HELCO requires two ground rods spaced a minimum of 6’-0” apart Figure 2-9a.. GENERAL OVERHEAD UNDERGROUND METERING OTHER 1/2" x 6" eye bolt with round washer and nut.. min. isometric view.) Rocky areas: Metal concrete form pegs Note: Customer's connection to ground must be 25 ohms or less. Service weatherhead 4" x 4" x 16' min. 18" min.. . 6'-0" max. 17 Hawaiian Electric Co.2" x 4" cross brace Service drop conductor 2" x 4" back support brace Direction of pulling load Metal concrete form pegs (typical) Top View Meter socket 2" x 4" brace Eye bolt Service drop conductor 4" min. 6" min. Temporary overhead service stand. 2'-0" max. Ltd. OTHER METERING UNDERGROUND OVERHEAD GENERAL OVERHEAD SERVICE . from eyebolt to top of weatherhead. 5'-6" preferred 2" x 4" cross brace Ground clamp Back support brace Metal concrete form pegs (typical) Ground line 18" min.. Inc... Residential and commercial minimum height 12'-0". maximum height 14'-0" Meter socket 45° 2" x 4" brace attached 2/3 distance up temp. • Maui Electric Co. Inc. 5/8" x 8' ground rod Side View Figure 2-9b. pole 5'-0" min. top and side views. • Hawaii Electric Light Co. . • Maui Electric Co.. • Hawaii Electric Light Co.ELECTRIC SERVICE INSTALLATION MANUAL . . Ltd. Inc. Inc..SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER 18 Hawaiian Electric Co. CHAPTER Underground Service 19 Hawaiian Electric Co.. Inc. Inc. Ltd.. OTHER METERING UNDERGROUND OVERHEAD 3 GENERAL UNDERGROUND SERVICE .. • Maui Electric Co. • Hawaii Electric Light Co. the customer may be required to install a pull box or handhole. The trench must be at least 8 inches wide for 2-inch conduit. Use care when excavating near the service stub – the service line is energized.. The minimum factory bend for 3-inch conduits is 24 inches. • Hawaii Electric Light Co. The customer may be required to install a pad for a padmount transformer within his property.ELECTRIC SERVICE INSTALLATION MANUAL . 20 Hawaiian Electric Co. Conduits under driveways must be Schedule 40 PVC encased in concrete and buried at a depth of at least 18 inches. City and county inspection and approval will be required. direct-buried at a depth of at least 18 inches. Inc. trenching. All ducts in a single uninterrupted run shall be of the same schedule PVC – transitioning of different schedules is not allowed. Consult the power company prior to construction. Inc.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER General The customer (or the customer’s contractor) is responsible for contacting the power company prior to commencement of construction. if the service run is too long to be served by the secondary system. between the property line and the meter socket. . service may be provided by the installation of an underground riser to an existing pole or from an existing underground distribution system. Conduits for service conductors must be Schedule 40 PVC. and backfill. or if the city or county requires underground service by ordinance. or runs with many bends. If the customer requests underground service.. The company also inspects all trenching prior to the burial/covering of conduits. The minimum factory bend for 2-inch conduits is 18 inches. or if required due to load. A maximum of two 90 degree bends is allowed on conduits. Conduits in easements must be Schedule 40 PVC concrete encased. Ltd. and at least 9 inches wide for 3-inch conduit. For conduit runs involving two 90 degree bends or more. or Schedule 80 PVC direct-buried at a depth of at least 18 inches. or pullboxes. handholes. • Maui Electric Co.. prior to the installation of the underground service by the power company. contact the power company for specifications. The utility will determine the appropriate design for the underground service. For long service runs. for a cost estimate and other requirements. Contact the power company if you are unable to locate the conductor stubs. The customer is required to provide and install all conduits. OTHER METERING UNDERGROUND Concrete encasement required 3' in each direction from pullbox OVERHEAD Point of service entrance connection GENERAL UNDERGROUND SERVICE . Pole Customer to stub-up one length of conduit up the pole Property line bend for 2" PVC {18" min. a pulling line in each conduit. factory Street Pullbox (when required) 18" min. • Hawaii Electric Light Co. 21 Hawaiian Electric Co... cover (top of conduit) Customer's conductors (if required) 6" min.. Underground service from overhead distribution. Inc. Underground Service from Underground Property line Street Transformer pad Handhole Handhole Figure 3-2. Ltd. factory bend for 3" PVC } 24" min.Underground Service from Overhead Customer's termination facilities Meter socket by customer The customer installs. • Maui Electric Co. Inc. and leaves in place. Splice can by customer (if required) Conduit by customer Figure 3-1. Underground service from underground distribution. Borrow. Section 16. Concrete requirements: Concrete strength: 2500 PSI in 28 days. Marker tape Type A backfill 8" 1’-6” min.. 2. • Maui Electric Co.* 2’-0” min. Marker tape Type A backfill 8" 1’-0” min. Inc. debris. or other unsuitable or deleterious material. • Hawaii Electric Light Co. highly elastic clay. 3" Type B backfill 3" 3" Detail C Schedule 40 PVC duct 3" Type B backfill 3" 3" Detail D Schedule 80 PVC duct Type A backfill: The city and county of Honolulu standard specification for public works construction. dated September 1986. poorly graded sand and gravel classified as SP or GP using the United Soil Classification System. Detail E Type A backfill Marker tape Schedule 80 (detail B) Schedule 40 (detail E) PVC duct Type B backfill Ground level 1’-6” min. or native soil material which does not contain more than 50% gravel and also does not contain hard lumps of earth 3 inches in greatest dimension. by Weight 100% 90-100% 35-100% 10-30% 3-15% Notes: 1. debris. 1’-0” min. Type B backfill: Select granular material passing a 1-inch sieve such as 3/4-inch aggregate base course gravel. Ltd.SEVENTH EDITION Type B backfill 3" 3" 8" 3" 3" 1'-0" GENERAL OVERHEAD UNDERGROUND METERING OTHER Trenching and Backfilling Finish grade Concrete sidewalk Pavement Ground level Type A backfill Marker tape 1’-6” min. Trenching and backfilling. Inc.. . 1’-0” min. S4C or material that is free of organics. 22 Hawaiian Electric Co. organics. Customer to check with the city and county of Honolulu for the duct line depth requirements within the city right of way.. Sieve Size 1” 3/4” #4 #40 #200 Passing. 1-1/2" 8" Concrete envelope Detail A Ground level 3" 3" 3" Detail B.ELECTRIC SERVICE INSTALLATION MANUAL . Maximum aggregate for ductline concrete: 3/4” Figure 3-3. highly plastic clay and meets the following gradation. excavate an additional 3 inches and provide Type B backfill. • Maui Electric Co. Backfill requirements. Backfill Backfill must be suitable material. • Hawaii Electric Light Co. No substitution of materials is permitted without a HECO engineer’s approval. 1550 pounds per cubic yard. Inc. When properly formulated and mixed. Medium aggregate (manufactured concrete sand). Use no vibration or compaction. Mix proportions which yield approximately 1 cubic yard of FTB are: • • • • Course aggregate (crushed basalt #67). Table 3-1. Water. it will solidify into a uniform efficient heat-conducting medium that will provide structural support and mechanical protection for the buried conduits. or organic material shall be placed in any backfill. Type A and Type B backfill are preferred. METERING 23 Hawaiian Electric Co. 500 pounds per cubic yard.. Ltd. Inc. The FTB shall be composed of fine to coarse natural aggregate cement and water as specified. trash. and placed as shown in Figure 3-3. The FTB may be pumped into place using conventional concrete pumps. Figure 3-3. as specified or approved by a HECO inspector. Install FTB by pouring it into the trench and completely filling all voids without causing excessive segregation. grass. as the flow requirements might have to be adjusted accordingly. As an alternative backfill. Fine aggregate (Maui dunes sand). Refer to detail drawings. however its method must be approved by a HECO engineer first. a controlled fluidized thermal backfill (FTB) may be placed around and above the conduits. OTHER UNDERGROUND OVERHEAD GENERAL UNDERGROUND SERVICE . 52 gallons.. 1300 pounds per cubic yard. If the normal material at the bottom of the trench is not Type B.With concrete sidewalk Without concrete sidewalk Customer’s property Driveways Parking area Easement Roadway Unpaved grass area Commercial Residential Condominium Primary Secondary Primary Secondary Primary Secondary A A A A A A A A AB* A A A A A A A* AB* AC* A A A ADE A A A A A C A A A A A AD A A A A A AD A A A A A C A ADE AC* C A Services * Multiple conduit installation where the conduits are arranged vrtically shall be installed in a concrete envelope. No brush.. The conduit must be 2-inch Schedule 40 PVC when the service conductors are no larger than #2 AL.. Marker tape must conform to HECO specification M0302. ducts for supply conductors must be separated from communication ducts and buried cables or conductors by at least of 3 inches of concrete. encased in concrete. • Hawaii Electric Light Co. • Maui Electric Co. or at least 4 inches of brick masonry. must be separated by at least 12 inches from any of those items. Conduit for conductors is Schedule 40 PVC. down the wall and into trench with a bend.ELECTRIC SERVICE INSTALLATION MANUAL . When the size of the service conductors is 3/0 or 350 MCM. The requirement for 2 inches concrete encasement is maintained. or at least 12 inches of earth. Underground Utility Duct Separation Concurrently Installed When concurrently installed. unless otherwise specified by the utility. and installed from the meter socket or pullbox. the conduit size must be 3 inches. before installing conduit in walls. The minimum factory bend is 18 inches for 2-inch PVC and 24 inches for 3-inch PVC. Inc. Inc.. Independently Installed When independently installed. 24 Hawaiian Electric Co. Ducts installed crossing. or other foreign substructures. must be separated by at least 6 inches. See Figure 3-4 for details. Recessed Conduit in Walls Consult with the power company.. Ltd. Place marker tape 12 inches above backfill or encasements. . oil. other pipe systems. water.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER Marker Tape Electrical warning marker tape is required above all conduits. ducts installed parallel to gas. Size of Splice Can 10"W × 12"H × 6"D 12"W × 18"H × 8"D 18"W × 24"H × 10"D 24"W × 30"H × 12"D 24"W × 30"H × 12"D 2" 3" 3" 3" 4" #2 AL #3/0 AL #350 MCM AL #3/0 Quad #500 MCM AL #1/0 #4/0 #350 MCM CU #350 Quad #500 MCM CU Table 3-2. Recessed conduit in a wall.) Size of Service Cable (max. the splice can may not be required. must be installed ahead of the meter socket.2" 2" Mudsill Floor Exterior surfacing Final grade Footing See Figure 3-3 3" Base Bottom of trench Figure 3-4. a splice can.. 25 Hawaiian Electric Co.. If pulling distance is less than 70 feet. METERING Size of Conduit (min. contact the power company for splice can sizes. The splice can must have provisions for seals which will be installed by the power company. as specified by the power company.) Size of Service Cable (min. Inc. • Maui Electric Co.. Mount splice cans not less than 6 inches. • Hawaii Electric Light Co. Ltd. *MECO only: 200 amp residential only. Splice Can If the size of the service is greater than 100 amps. nor more than 3 feet from the finished grade to the bottom of the splice can.) UNDERGROUND OVERHEAD GENERAL UNDERGROUND SERVICE . OTHER Connect a duct to the meter socket or splice can (if required) using a Schedule 40 PVC conduit bend and Schedule 40 PVC conduit. Inc. Splice can size requirements. If more than one conductor per phase is required. above ground. 6' max.ELECTRIC SERVICE INSTALLATION MANUAL . If the stand is to be in service for longer than one year. Meter can Future wall Waterproof GFCI outlet(s) with cover(s) 45° Splice can if required Preferred meter height is 5-6" 5' min. • Maui Electric Co. 26 Hawaiian Electric Co.. Attach the wood brace at a point two-thirds of the height of the stand. Ltd. Not allowed for MECO (Maui). All facilities must meet NEC requirements. • Hawaii Electric Light Co.. Temporary / permanent service stand. . and secure the stand with bolts or nails. Inc. All timbers may be rough. isometric view.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER Temporary Service The customer furnishes a sturdy stand. Attach braces to the stand.) 3/4" plyboard Meter socket should not be attached (screwed) to the stand from within the interior of the enclosure. All materials must be for outdoor use. Buried portions of stand and stake(s) must be treated and tamped.. consult with the utility for additional requirements. Conduit Existing building footing Ground line Figure 3-5. and locates it where specified by the power company. Inc. per power company standards. 24" W x 30" H (min. All materials for outdoor application. Temporary service stand. 6'. 11.0" max. Ltd. Attach wood brace at a point 2/3 the height of the pole above ground.. Soil areas: 2" x 4" wooden stake or forming stake (driven into ground 2 ft.. Customer shall consult the utility if the pole is to be in service over one year. Inc.0" min. 4. Ground rod by customer Notes: 1. Pole to be in service for one year or less. Due caution should be taken while excavating. min.Road right-of-way 2" x 4" timbers (min) 5'-0" max Conduit Company service tails or stubouts (consult company) 5'-0" max 3'-6" 3' Property line Top View Underground meter socket. In rocky areas. Customer does all necessary trenching and backfilling.) company's service tails.) Rocky areas: Metal concrete form pegs Side View To power company point of connection 18" min. 7. All timbers may be rough. • Maui Electric Co. OTHER METERING UNDERGROUND 45° Ground per NEC article 250 OVERHEAD GENERAL UNDERGROUND SERVICE . and circuit breakers by customer Meter socket Single 4" x 4" timber (min) (one piece. Buried portions of pole stake(s) shall be treated and tamped. 9. iron form pins may be used in lieu of 18" minimum bury. • Hawaii Electric Light Co. 5. Customer locates and exposes (18" min. Consult with the utility’s customer engineering division when connecting to service box. 6. 5'-0" max Property line 5'. Customer to install a 13” x 24” (minimum) pullbox for the company to splice in. Inc. 5'-6" preferred Ground line Weatherproof GFCI outlet(s) with cover(s) Conduit Tamp pole in solidly 18" min. 10. 2. Electrical facilities shall be installed per NEC. Figure 3-6. No splicing of timber. Braces shall be attached to pole stakes with bolts or nails in such a way as to assure stability.. Meter must face road or driveway. 3. no splice) Attach braces to pole and stakes to assure stability at a point two-thirds the height of the pole. Customer shall furnish a sturdy pole and locate it as specified by company. rain tight outlets. 8. 27 Hawaiian Electric Co. as company's cables are energized. Inc...0" min.) 3'. 12" min. Sidewalk Finish grade Provide 6" min. cesspools and leach fields. 28 Hawaiian Electric Co.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER Pool deck Highest water level Conduit Inside face of pool 5'-0" Figure 3-7.0" min. (lateral) Figure 3-8. Clearances between residential electric and gas meters. • Maui Electric Co. clear separation in all directions between gas and electric lines (typical) Requirements per NESC must be met.. 6'.ELECTRIC SERVICE INSTALLATION MANUAL . Inc.0" max. Underground service clearances for swimming pools. Ltd. Electric and gas meters must not be installed in the same enclosure Meter socket enclosure Building corner Centerline of gas pipe at wall penetration Gas meter 5'. (Similar for septic tanks. • Hawaii Electric Light Co. . • Maui Electric Co. Ltd. and anchor bolts. When parts of building structures are located directly over the concrete pad. Compact by rolling the site in accordance with city and county specifications for compacting sidewalk areas. must have a minimum radius of 20’-0". The customer must provide and install adequate protection for transformers. All ducts must contain a muletape pull line. The duct is PVC Schedule 40 pipe. for inspections by the power company. the concrete curb and rock fill around the pad must be furnished and installed by the customer. Inc. (Refer to transformer concrete pad details). METERING UNDERGROUND OVERHEAD When the concrete pad is located in the vicinity of existing or future combustible material or combustible buildings. Bends due to changes of grade. OTHER 29 Hawaiian Electric Co. When required. and be free of obstruction at all times. • • • The front side of the concrete pad must face vehicular access.. Inc. a minimum clearance of 9’-0" from the surface of the pad is required.. construct a retaining wall of suitable material to prevent future filling of pad. subject to the approval of the city and building inspector. Customer Responsibilities The customer is responsible to: • Furnish materials and construct the facilities for the padmount transformer including the concrete pad. Consult with power company for type and location. • • • Allow 5 working days advance notice. the customer must provide safeguards as outlined in the NEC. • Hawaii Electric Light Co.. A minimum of 10’-0" wide vehicular access to the transformer. Wesco catalog #0728-9200 or equivalent. After the conduits are installed. Use select backfill. the customer must pass a smooth bullet-shaped wooden test mandrel through the entire length of each conduit to test for freedom from burrs and obstructions.Transformer Pads Location Requirements for the location of pads for transformers and other equipment include: • • No permanent or temporary structure or object may be erected or placed within areas where clearances are required. Grade sufficiently around the pad site to prevent future filling in of the pad. Install the duct from the pad to the riser pole or handhole as designated on the plan. GENERAL UNDERGROUND SERVICE . primary and secondary ducts. The power company must have: • • 24-hour access to the transformer without passing through locked areas. When required. Ltd.. 5.4" 21/4" 2" Primary duct Side View Notes: 1. 8. Inc. . Final grade 4" Rock sand (screen #4 crushed rock) by customer Secondary duct 2" . 30 Hawaiian Electric Co. *Trench shall be backfilled by customer after HECO installs cables. • Hawaii Electric Light Co. This area shall be filled with #4 lava rock.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER 6'-0" 2'-6" 10" 1 1'-4" 1 /2" 11/2" 3'-6" 3'-4" 5" 71/2" 1'-0" 71/2" 5" 1'-10" 11/2" 2'-0" minimum clear space in back and sides 10" 10" 7'-0" 4'-2" 10" 1'-0" 5" 11" 11/2" Secondary ducts Front 1'-6" 11" Primary ducts 6" 9" 8" #3 bars. Inc. 7. Excavate a trench 4'-0" wide and 2'-0" deep from main trench to pad site. Refer to HECO material drawing 011249 for details of concrete pad. • Maui Electric Co.. *HECO only. Excavate an area 3'-8" x 2" deep after lot is compacted. 6.. 3. Concrete pad for a single-phase padmount residential transformer. Compact by rolling the lot site in accordance with C&C of Honolulu standard specifications for compacting sidewalk areas. 9. the customer shall construct a retaining wall of suitable material to prevent future filling in of the lot. Figure 3-9. all reinforcement 2-#3 x 1'-9" diagonal 5/8" x 8'-0" copper ground rod Property line 2-#3 x 1'-4" diagonal Easement 1'-6" Centerline Sidewalk area Top View 5/8" galvanized anchor bolt Ground rod 13/4" 6" 11/2" 1" 3/8" radius all around Tamped soil 1'-6" min. When required. Sloping terrain from back and sides of pad may begin from easement. Grade and compact the pad site so that the higher front corner matches the concrete sidewalk grade. Grade sufficiently around the lot site to prevent future filling in of the lot. 2. 4. *Furnish and install precast concrete pad after HECO installs cable. HELCO requires two ground rods spaced a minimum of 6’-0” apart.ELECTRIC SERVICE INSTALLATION MANUAL . The lot shall have a slope not greater than 1/2" per foot toward the sidewalk. Concrete pad for a single-phase padmount commercial transformer. Top of pad shall be smooth. all reinforcement GENERAL UNDERGROUND SERVICE .7'-4" 3'-8" 2'-0" 2'-0" minimum clear space in back and sides 11/2" 11/2" 10" 10" 4'-2" 10" 1'-0" 5" 11/2" 1'-6" 8'-0" Secondary ducts 11" Front 1'-6" 11" Primary ducts 6" 9" 8" 2-#3 x 1'-4" diagonal Property line 3'-4" 5" 71/2" 1'-0" 71/2" 5" 3'-8" 2'-0" 11/2" 2'-0" minimum clear space in back and sides 2'-0" 2-#3 x 1'-9" diagonal 5/8" x 8'-0" copper ground rod Centerline 8'-0" minimum clear space in front of concrete pad Sidewalk area Top View 5/8" galvanized anchor bolt Ground rod 13/4" 6" 11/2" 1" 3/8" radius all around Tamped soil 1'-6" min. Final grade Primary duct Side View Figure 3-10.000 PSI at 28 days. and duct encasement details for duct requirements. true. All items shall be furnished in place complete by customer. Compressive strength of concrete shall be 3.. primary and secondary one line diagram. OTHER Notes: 1. 7.. 5. 4. 8. 6. Typical installation. HELCO requires two ground rods spaced a minimum of 6’-0” apart. HECO easement as marked for each transformer. 31 Hawaiian Electric Co.. • Maui Electric Co. Ltd. • Hawaii Electric Light Co. Refer to plot plan. METERING 21/4" Rock sand (screen #4 crushed rock) by customer Secondary duct 4" 2" UNDERGROUND OVERHEAD Easement #3 bars. Inc. level and other exposed surfaces shall be smooth and free from defects. Concrete shall be cured by approved method (ASTM A15). 3. 2. Inc. Reinforcing bars shall be clean deformed bars. 500 PSI minimum or after 14 days. 7. Top of concrete to be smooth and true. Inc.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER Edge of required clearance. 8'-0" 2-4" conduits (3'-0" radius bends) Customer to terminate secondary ducts in this area 1'-3" 7'-6" 1'-6" A 2'-3" 2'-6" 71/2" A 1'-0" 1'-71/2" Front 1'-9" 1'-9" 1'-6" 5/8" x 10'-0"ground rod furnished by utility and installed by contractor (see Note 3) Plan View Cut down PVC prior to concrete placement #4@8" O/C Final grade 10" Two 4" primary conduits encased in 3" concrete jacket 11/2" CL. A second ground rod will probably be required when soil resistivity is greater than 67 ohm-meters. as per city and county specifications. If ground resistance is more than 25 ohms. Locate. 2" See Note 4 #4 cont. 32 Hawaiian Electric Co. Moisture cure concrete pad a minimum of 7 days. wood-float finish. Inc. Figure 3-11. secure. • Hawaii Electric Light Co.. Concrete pad for a 75-300 kVA three-phase padmount transformer. 5/8" diameter x 10'-0" ground rod (stock code 193457) furnished by utility and installed by customer.. and 8'-0" in front of pad. 2'-0 from the back of pad. 30-5000 for locations and clearances. 4. install additional 5/8" diameter x 8'-0" ground rod (stock code 101527) and connect 4/0 bare copper ground wire between ground rods. and cap all conduits before pouring pad. 3. Maintain a relatively level. Extend concrete pad an additional 8'-0" in front if located in planting area. Refer to std. Ltd. 4" 4" #4@9" O/C 1'-6" 2'-6" 71/2" 1'-71/2" 1" 1'-9" 6" 1'-6" #4@8" O/C 2"CL. free of defects. Top of rod 12” below grade. Refer to std. 22-2005 for 3 phase padmounted transformer requirements. Do not install transformer until concrete compressive strength reaches 1. Round all exposed edges to 3/4" chamfer. minimum clearance of 2'-6" from the sides of the pad. • Maui Electric Co.. 5. Grade 40 minimum.ELECTRIC SERVICE INSTALLATION MANUAL . See Note 7. Reinforcing: ASTM A615. Additional 5/8" x 8'-0" ground rod (see Note 3). A minimum of 6'-0" shall be maintained between the driven ground rods. #4@9" O/C Secondary conduits as per specific project requirement 6" Section A-A Notes: 1. 6. . 2. Concrete: 3000 PSI compressive strength in 28 days. 22-2005 for 3 phase padmounted transformer requirements. A second ground rod will probably be required when soil resistivity is greater than 67 ohm-meters. rod furnished by HECO and installed by contractor (see note 3) Plan View Cut down PVC prior to concrete placement 2'-9" 11/2" CL. 10" 6" 4" 4" #4@9" O/C EW 2" Maintain an 8'-0" clearance from front. wood-float finish. Concrete: 3000 PSI compressive strength in 28 days. 2'-0 from the back of pad. If ground resistance is more than 25 ohms. secure. OTHER Notes: 1. Secondary conduits as per specific project requirement Section "A-A" 2-4" Primary conduits encased in 3" concrete jacket Figure 3-12a. Inc. and cap all conduits before pouring pad. Maintain a relatively level. 4. install additional 5/8" diameter x 8'-0" ground rod (stock code 101527) and connect 4/0 bare copper ground wire between ground rods. Do not install transformer until concrete compressive strength reaches 1. free of defects. 2. Concrete pad for a 500-750 kVA three-phase padmount transformer. 33 Hawaiian Electric Co. A 2'-0" 5/8" x 10'-0" grd. 6.Additional 5/8" x 8'-0" ground rod top of rod 12" below final grade (see note 3) 8'-6" 1'-0" A 1'-6" 2'-0" 1'-3" max. Moisture cure concrete pad a minimum of 7 days. Ltd. Grade 40 minimum. Top of concrete to be smooth and true. • Maui Electric Co. and 8'-0" in front of pad. Refer to std.. A minimum of 6'-0" shall be maintained between the driven ground rods.. encased in 3" concrete jacket 8'-6" Concrete pad (refer to notes) Customer to terminate secondary conduits in this area.. METERING UNDERGROUND OVERHEAD Primary conduits (2-4). 7. minimum clearance of 2'-6" from the sides of the pad. Inc. Extend concrete pad an additional 8'-0" in front if located in planting area. • Hawaii Electric Light Co. 2" Final Grade 3/4" Chamfer #4 cont. Secondary conduits per specific project requirements. 5. 5/8" diameter x 10'-0" ground rod (stock code 193457) furnished by utility and installed by customer. Refer to std. 30-5000 for locations and clearances. Round all exposed edges to 3/4" chamfer. GENERAL UNDERGROUND SERVICE . (see note 7) 71/2" 1'-91/2" 1'-6" 1'-9" maximum 6" 1" 1'-7" #4@9" O/C EW 2"CL. 3. as per city and county specifications. Reinforcing: ASTM A615. Locate.500 PSI minimum or after 14 days. Refer to std. 2'-0 from the back of pad. 6. 3. Figure 3-12b. secure. install additional 5/8" diameter x 8'-0" ground rod (stock code 101527) and connect 4/0 bare copper ground wire between ground rods.. wood-float finish. install additional ground rod or ground wire. Property line Customer to terminate secondary ducts in this section. Round all exposed edges to 3/4" chamfer. Concrete: 3000 PSI compressive strength in 28 days.ELECTRIC SERVICE INSTALLATION MANUAL . Top of concrete to be smooth and true. 2. free of defects. 12" If ground resistance exceeds 25 ohms. and cap all conduits before pouring pad. • Maui Electric Co. 4. Moisture cure concrete pad a minimum of 7 days. 1'-6" x 10'-0" ground rod furnished by utility company and installed by customer. Maintain a relatively level. A second ground rod will probably be required when soil resistivity is greater than 67 ohm-meters. 7. Concrete pad for a 75-750 kVA three-phase padmount transformer. . minimum clearance of 2'-6" from the sides of the pad.. A minimum of 6'-0" shall be maintained between the driven ground rods. Sewer/water lateral 6'-0" minimum (unless otherwise noted) 5'-0" minimum Fire hydrant Plan View Notes: 1. Grade 40 minimum. 5/8" diameter x 10'-0" ground rod (stock code 193457) furnished by utility and installed by customer. as per city and county specifications. • Hawaii Electric Light Co. and 8'-0" in front of pad. Do not install transformer until concrete compressive strength reaches 1. Inc. If ground resistance is more than 25 ohms. 30-5000 for locations and clearances. Locate. Inc. Ltd. (MECO only) 34 Hawaiian Electric Co.SEVENTH EDITION A 2'-0" 10'-0" 6'-6" 18" 1'-6" 8'-0" Front clearance GENERAL OVERHEAD UNDERGROUND METERING OTHER #4 @ 10”± 1-1/2" CL 3" 6" 4" 4" 4" 3/8" rounded edges Final grade #4 @ 12”± Firm undisturbed ground or compacted fill Section A-A Property line 12'-3" 2'-6" 7'-3" A 2'-6" 2-4" conduits (3'-0"radius bend) extended 3" above finished pad 5/8" 2'-0" 6" 12" sq. 22-2005 for 3 phase padmounted transformer requirements.500 PSI minimum or after 14 days.. Refer to std. 5. Reinforcing: ASTM A615. Extend concrete pad an additional 8'-0" in front if located in planting area. Ltd. The slope of a grade in front of the pad must not exceed 1/4" rise to 1’-0" run.) Sidewalk Street Padmounted transformer 8' (10"-0" for 25 kV equip. Keep the slope at a flat grade. Inc. OTHER METERING UNDERGROUND OVERHEAD GENERAL UNDERGROUND SERVICE .Clearances Around Padmount Transformers Consult with the power company’s engineering department prior to installation of transformer pad. Inc. Power company handholes and manholes may be installed within this 8’-0" clearance. or flatter. • Maui Electric Co.) Sidewalk Street Figure 3-13a.. • Hawaii Electric Light Co.. Clearances around padmount equipment. 35 Hawaiian Electric Co. for hot stick operation. Sloping terrain may begin no closer than 2’-0" from the end of the transformer pad. and from the same elevation as the flat grades.. Padmounted transformer 8' (10"-0" for 25 kV equip. Sloping terrain is restricted to a 1’-0" rise per 2’-0" run. The maximum height of sloping terrain is 7’-6". Required minimum clearances include: • • • • • 8’-0" front clearance.) Sidewalk Street Padmounted transformer 8' (10"-0" for 25 kV equip. • Maui Electric Co. 2. Clearances around padmounted equipment.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER Padmounted transformer 2' 1' Note 1 8' (see note 3) Padmounted transformer 8' (see note 3) 1' 2'-0" 2' Note 1 Padmounted transformer 8' (see note 3) 1' 1/4" 2'-0" Note 2 Street slope may vary Notes: 1. . 3. • Hawaii Electric Light Co. Inc. Figure 3-13b.ELECTRIC SERVICE INSTALLATION MANUAL ... In front of transformer pad.. 10'-0" for 25 kV equipment. Sloping terrain may begin 2'-0" from the end of the transformer pad and from the same elevation and is restricted to a 1'-0" rise to a 2'-0" run. Inc. the slope may not exceed a 1'-0" horizontal run to 1/4" vertical rise. Ltd. Maximum of height of sloping terrain shall be 7'-6". 36 Hawaiian Electric Co. . • Maui Electric Co. OTHER 15587 Vault Vault MH Type 6160 METERING UNDERGROUND 71990 26922 18842 18847 26919 16687 26919 20358 6” wall 8” wall Precast Precast Cast-in-Place Cast-in-Place Cast-in-Place Cast-in-Place Precast Cast-in-Place Cast-in-Place Precast Cast-in-Place Precast Cast-in-Place Cast-in-Place Cast-in-Place Cast-in-Place Cast-in-Place Precast Cast-in-Place Precast Precast Precast Precast Cast-in-Place Precast Precast Cast-in-Place Cast-in-Place Cast-in-Place Precast Precast Conc. 37 Hawaiian Electric Co. Extension. Box Body. Handhole and manhole material. Ltd. Svc.. • Hawaii Electric Light Co. Inc. Inc.Underground Construction Handholes. Cover. Base No base slab LRFD Non-Traffic Light Traffic Non-Traffic Light Traffic LRFD LRFD Non-Traffic Non-Traffic LRFD LRFD LRFD LRFD LRFD LRFD LRFD LRFD Non-Traffic LRFD LRFD LRFD Non-Traffic LRFD LRFD LRFD LRFD Non-Traffic Non-Traffic LRFD LRFD LRFD LRFD Type 35V Type 4140 (Double compartment) Type 46V Type 46V Type 460 Type 460 Type 514 OVERHEAD Concrete GENERAL UNDERGROUND SERVICE .. 7’ x 14’ 6’ x 14’ 6’ x 14’ 6’ x 16’ Wall Construction Type HH HH HH Precast Precast HH HH HH HH HH HH HH MH Vault Vault Vault Vault MH MH MH MH Vault MH Vault Vault MH MH Vault MH MH Vault Vault Vault Vault MH Vault Vault MH MH MH Description Non-concrete service box Non-concrete service box Non-concrete service box Loading 3” wall 7” wall 6” wall 7” wall 18848 16687 18843 26920 26920 26922 26921 18849 26921 26922 18844 18775 71468 20156 71467 71133 20353 Type 57V Type 570 Type 58V Type 58 Type 58 Type 6110-6 Type 6110-8 Type 611V Type 611 8” wall 6” wall 8” wall 8” wall 8” wall Type 6110 Type 6140V Type 614 Type 614 Type 614 Type 614V & 714V Cast-in-Place Cast-in-Place 9” wall 9” wall Precast Cast-in-Place Cast-in-Place LRFD LRFD Non-Traffic Non-Traffic LRFD Table 3-2. Vaults and Manholes Old Dwg 30-2006 30-2006 30-2006 30-2005 100930 15501 18841 101020 101021 101022 101023 100901 100917 101024 101026 100902 100906 100916 100926 100927 100700 100903 100918 102301 100907 100911 100929 102302 100726 100727 100904 100908 102303 102304 100919 100905 100909 100912 100925 100928 102305 102306 100920 New Dwg Size 13” x 24” 17” x 30” 24” x 36” 2’x4’ 2’x4’ 3’x5’ 3’x5’ 3’x5’ 3’x5’ 3’ x 5’ 4’ x 14’ 4’ x 6’ 4’ x 6’ 4’ x 6’ 4’ x 6’ 4’ x 6’ 4’ x 6’ 5’ x 14’ 5’ x 7’ 5’ x 7’ 5’ x 7’ 5’ x 7’ 5’ x 8’ 5’ x 8’ 5’ x 8’ 5’ x 8’ 6’ x 11’ 6’ x 11’ 6’ x 11’ 6’ x 11’ 6’ x 11’ 6’ x 11’ 6’ x 11’ 6’ x 14’ 6’ x 14’ 6’ x 14’ 6’ x 14’ 6’ x 14’. A drainage swale behind the wall must be installed to divert water around the equipment. these requirements apply: • • • The concrete area must be at least 3-1/2" thick. Inc. if required.) For walls taller than 24" high. acceptable protection such as a fence must be installed at the top of the wall to prevent falls. must not drain in the area occupied by power company equipment. • Hawaii Electric Light Co. . • • • 38 Hawaiian Electric Co. Gravel may be used instead of concrete. • Maui Electric Co. Retaining walls must meet state and city codes and requirements for retaining walls.ELECTRIC SERVICE INSTALLATION MANUAL . Handhole and manhole material. (Must be submitted for utility company review. Weep holes. Ltd. slope the concrete toward the front or sidewalk. fences. Table 3-2 (continued). the wall can be extended to a sufficient height to prevent falls.. For drainage. Alternatively. Retaining walls must be of sufficient height to protect the equipment from erosion and run-off of dirt and water. Retaining Walls When pads cut into hillsides.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER Old Dwg New Dwg 15588 18776 16398 20650 16688 16688 sh1 16688 sh2 16688 sh2 100922 100921 100923 100924 100900 100914 100913 101028 101029 Size 7’-2” x 16’ 7’ x 9’ 8’ x 11’ 8’ x 16’ Wall Construction Type Cast-in-Place Cast-in-Place Cast-in-Place Cast-in-Place MH MH MH MH Description Type 72160 Type 790 Type 8110 Type 8160 Grating Cover Miscellaneous Manhole and Handhole Details Miscellaneous Manhole and Handhole Details Concrete Covers Type ”TR” Modified Traffic Cover for AASHTO H2O Loading LRFD LRFD LRFD LRFD LRFD LRFD Note: Load and Resistance Factor Design (LRFD) traffic rated structures are required within the state right-of-way. and are outside the easement area.. Retaining walls. and foundations are installed by the customer.. Inc. • Maui Electric Co.. • Hawaii Electric Light Co. Ltd. Retaining walls near electrical equipment. OTHER METERING UNDERGROUND OVERHEAD GENERAL UNDERGROUND SERVICE .. Actual retaining wall designed and built by customer. Inc.. Inc.x x x 1'-4" x Concrete or gravel area x x Easement line x Easement line 7'-0" x 4'-2" Single phase transformer pad x For illustration purposes only. Retaining wall with fencing material. 39 Hawaiian Electric Co. Figure 3-15. Actual retaining wall designed and built by customer. Fencing material S W A L E For illustration purposes only. x x 10" 1'-6" 3'-4" 6'-0" 1'-10" x Property line Figure 3-14. 3-15. For all applications.. • Hawaii Electric Light Co. Retaining wall with drainage protection when weep holes are required. 1'-6" Property line 10" 3'-4" 6'-0" 1'-10" For illustration purposes only. The same slope and wall requirements apply to other equipment such as three-phase padmount transformers and switchgear. Ltd. Inc.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER Perforated PVC pipe Concrete or gravel area 1'-4" Easement line 7'-0" Easement line Single-phase transformer pad 4'-2" For illustration purposes only. Inc. and 3-16 show a single-phase padmount transformer. . Actual retaining wall designed and built by customer. • Maui Electric Co. 40 Hawaiian Electric Co. Figures 3-14.. 2' square #3 fine gravel wrapped with geotextile fabric (Amoco 4545 or equal) 4" perforated PVC drain pipe slope to daylight above sidewalk Figure 3-16. the slopes and walls are outside the designated clear zones for the equipment installed. Actual retaining wall designed and built by customer.ELECTRIC SERVICE INSTALLATION MANUAL .. . OTHER METERING UNDERGROUND OVERHEAD 4 GENERAL .. Ltd. • Hawaii Electric Light Co.. Inc. Inc.CHAPTER Metering 41 Hawaiian Electric Co. • Maui Electric Co. including plastic covers for open sockets Conduits and raceways.. connectors and lugs. and maintains its meters. and for all services over 600 volts. owns. • Maui Electric Co. plot plan of location of metering equipment. *MECO and HELCO: the customer shall install the instrument transformers provided by the power company.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER Introduction This chapter describes the installation of the meter itself. and other metering accessories.ELECTRIC SERVICE INSTALLATION MANUAL . and maintains the following for company meters: • • Meter sockets. Inc. installs. and to local regulations. test switches. • • • • • • • And where applicable: 42 . Splice cans Protective equipment. Self-contained metering for single-phase residential services of 320 continuous amps and less. including main breakers and switches Meter enclosures Instrument transformer enclosures with transformer mounting brackets Meter centers Switchboards/switchgears Submit four sets of the manufacturer’s switchgear drawings to the power company for approval before equipment fabrication or construction.. One set of drawings Hawaiian Electric Co. Customer Responsibilities The customer provides. This chapter has the following subsections: • • • General information which applies to all meter installations. Ltd. three-phase and commercial services over 200 amps. installs. • Hawaii Electric Light Co. and wiring (*except wiring for instrument transformer metering which is supplied by the power company) *HECO and MECO only.. elevation of metering equipment. General Information Power Company Responsibilities The power company provides. and all three-phase and commercial services of 200 amps or less. instrument transformers. Inc. Instrument transformer metering for residential single-phase services over 320 continuous amperes. Include the electrical service one-line diagram. meter installations must conform to NEC requirements. In addition to these requirements. and manufacturer’s design drawings of switchgear in reference with applicable EUSERC drawings. The power company requires 3 months to review. the meter number and other information concurs with meter installation instructions. suite. The customer’s main service breaker or switch is installed. Inc. For certain situations. • Hawaii Electric Light Co. Labels The customer shall provide and maintain a permanent label at each commercial. If multiple meters are installed. laminated phenolic (or equivalent) nameplates with 3/8-inch minimum block lettering. Submit the drawings well in advance. Typically. The local inspection authority has approved the installation. Conditions for Energizing A meter will be installed and the service energized when: • • • • The customer’s metering equipment is installed and approved by the power company. the utility’s meter electrician shall: • • Confirm that the meter panel/socket has been properly labeled by the customer and/or its electrical contractor in accordance with ESIM requirements. After installation. The utility’s meter electrician has the ultimate discretion to approve or deny a meter installation. or unit. the customer shall maintain the labels current. For example: Identify the number of the apartment. Meter Location Metering equipment is installed at a convenient location on the customer’s premises which is approved by the power company.. and order metering equipment for primary service.will be returned to the sender with approval or required corrections. Prior to energizing service by the utility company. • Maui Electric Co. Ltd.. industrial. legible. Acceptable labels include engraved. and multi-unit dwelling meter socket. Inc. Prior to meter installation. After County approval of the electrical system. and at the main service disconnect to accurately identify the space served.. the utility’s meter electrician will review the installation and install the meter. and accurate. UNDERGROUND OTHER METERING 43 Hawaiian Electric Co. and Confirm that the meter panel/socket labeling. all meters are installed at one central location. the inspection by county electrical inspectors must be completed. the local authority is the city or county building department. with due consideration of the Utility’s Accident Prevention Manual (APM) Meter Service Rules. plan. intended for permanent applications. Adhesive-type labels (including label-maker tape) and felt tip pens do not satisfy the labeling requirement. the company may require that the customer’s contractor be present at the time of energization. OVERHEAD GENERAL METERING . etc. On the plan view and elevation drawings. indicate all equipment or structures near the metering equipment. meter reading.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER The metering location must be free from obstructions. Ltd. metering equipment and enclosures must be readily accessible at all times (24 hours) by power company personnel for emergencies. or a similar structure that will enclose metering equipment.. 44 Hawaiian Electric Co. patio. All meters. outside the garage. Locating Residential Meters Meter sockets for residential services are located within 4 feet of a corner of the residence or building nearest the street. carports. If renovations are made to a carport. the customer must relocate the metering equipment to an accessible location. breezeways. Locations for residential meters. Inc.ELECTRIC SERVICE INSTALLATION MANUAL . corrosive atmospheres. . and maintenance in accordance with the tariff. • Hawaii Electric Light Co. Residence Property line Property line Preferred meter location Garage Acceptable meter locations. Figure 4-1. and meter elevation drawings for approval.. on the side wall. Unacceptable Meter Locations • Locations not readily accessible such as inside garage walls. easement. and vibrations. plan view. Inc. the power company must approve the meter location for these services. alley. Submit a one-line diagram. The preferred corner is at the front of the residence. or areas that may be enclosed. inspection. Driveway Street.. Because of the variations in commercial and industrial facilities. Meter Locations for Commercial and Industrial Services Locate metering on ground level unless approved by the utility. testing. garage. • Maui Electric Co. abnormal temperatures. maintain required clearances. unless approved by the power company. etc. Near moving or rotating machinery. corrosive atmosphere or similar deteriorating agents are present. or around doors or window openings. storage. doorway. • • • • • • • • • • • • • • • • • Do not install metering equipment in a generator room. unless the meter is at least 5 feet from such parts and is effectively screened or separated by a barrier from those parts. docks. Where excessive moisture. In a stairwell. In an elevator shaft or hatchway. abnormal temperature. Inc. or the width of a swinging door or window. dust. such as along freeways. Fenced-in areas. bath. or in compliance with the requirements set forth by the authority having jurisdiction. Allow a clearance of not less than 6 inches between the meter can and any door. fencing. powder. switchboard or other bare or exposed live parts. In an attic or area not in general use. On any portion of a building where future landscaping. windows. Inc. Near any high-voltage compartment. guard dogs.• On doors. • Maui Electric Co. vibration. or window opening.. In a restroom. or other building construction will make the meter inaccessible. Install metering equipment for piers. • Hawaii Electric Light Co. or berths. Where the meter protrusion could obstruct and create a hazard to pedestrian and/or vehicular traffic.. OTHER METERING UNDERGROUND Where noise levels exceed 85 decibels. security gates or doors. On piers. Ltd. docks or berths at a minimum of 10 feet from the edge of the water. fumes. Protection Against Noise Exposure. Near gas lines/equipment.. shower. or janitorial rooms. or toilet room. 45 Hawaiian Electric Co. On power company poles unless approved by the power company. OVERHEAD GENERAL METERING . In an area protected by alarm systems. See Hawaii OSHA regulation 12-200-9. Enclosed areas used for trash chutes. salt spray.. .SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER Clearances Around Meters Allow the following clearances around metering equipment: • • Clearance around the meter: 6 inches above. Inc. 6'-0" max. fences. or other structures or equipment. Clearances around meters. trees. and to the side of the meter socket enclosure or instrument transformer enclosure. to any obstruction. . 46 Hawaiian Electric Co. A clearance in front of metering equipment of 4 feet by 4 feet by 7 feet with no obstructions such as walls. 6" min. Ltd.. • Hawaii Electric Light Co. Clear and level working space with no shrubs Figure 4-2. 5'-6" preferred to center of meter socket 4'-0" min . Inc. • Maui Electric Co.. hedges. on all sides of the meter socket.ELECTRIC SERVICE INSTALLATION MANUAL . Meter socket enclosure Finish wall for meter mounting Nearest corner or other obstruction on either side of meter socket Ceiling or other obstruction above meter enclosure 6" minimum Surface of meter socket enclosure 7'-0" minimum working space height 4'-0" minimum front clearance from surface of meter socket 5'-0" min.. meter closet. for review and approval. Access If the customer locks the doorway to the facility. Meter electricians performing meter test.4 feet Electrical Rooms. 47 Hawaiian Electric Co.. • Maui Electric Co. and Other Enclosed Areas If the meter or metering equipment will be installed in a electrical room.. contact the power company’s Customer Installations Department for other locking means. Notice the need for workspace clearance between the meter socket panel. OTHER METERING UNDERGROUND Figure 4-3. • Hawaii Electric Light Co. submit drawings of these installations to the power company prior to construction. the lock will be keyed to the power company’s Best (brand) key core. Meter Closets. and the pole on the floor. such as the use of a key box or Supra lock box near the doorway. Ltd. Inc. OVERHEAD GENERAL METERING . Alternatively. Inc.. or enclosed area. . Grounding of communication equipment must not alter or reduce the integrity of the electrical service grounding system. 2. Inc. data processing equipment. All locksets must accommodate the power company’s Best (brand) core insert. Neither the ceiling. etc. 4. Figure 4-4. Consult with the power company prior to installation. meter closet. Communication equipment must not be installed such that it can contact or open into metering equipment. Inc. • Maui Electric Co. Door locksets. 48 Hawaiian Electric Co. Core and individual keys are furnished and installed by the power company. Ltd. The lockset is furnished and installed by the customer. or enclosed area must be through a vertical doorway that can be opened from the exterior of the building.ELECTRIC SERVICE INSTALLATION MANUAL . nor door. nor doorframe shall interfere with the clearances necessary for the installation or maintenance of service and metering equipment. Communication Equipment Telephone. or an entryway acceptable to the power company. Center doubledoor frames or similar framing must not obstruct the required workspace clearance in front of metering equipment. are permitted in an electrical room. • Hawaii Electric Light Co. meter closet.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER Core furnished and installed by company Throw plug core insert Lockset (door knob) to be furnished and installed by customer Typical lockset installation Notes: 1.. Doors Entry into an electrical room. . or enclosed area under the condition that the installed equipment does not obstruct or violate the required working space clearances. 3. The door must be at least 3 feet wide and 6 feet 6 inches high. CATV.. meter closets. Provide a minimum illumination of 50 foot-candles.. • Maui Electric Co. or enclosed metering areas includes: • • • • • • Gas equipment. Install electrical outlets in accordance with local building codes. Exception: Sprinkler piping systems and sprinkler heads are allowed in these installations if required by the local fire or building codes. including piping systems. Storage of miscellaneous equipment. When placing sprinklers.. Inc. Ltd. meter closet. battery charging equipment. or enclosed area must be well lit in accordance with local building and NEC requirements. etc. liquids. 49 Hawaiian Electric Co. Mechanical equipment. Water heaters or boilers including any piping systems under pressure Wet filled batteries.Foreign Equipment Equipment not permitted in electrical meter rooms. • Hawaii Electric Light Co.. The appropriate inspection authority shall determine placements and shielding of sprinkler heads. materials. Inc. Illumination and Electrical Outlets The electrical room. OTHER METERING UNDERGROUND OVERHEAD GENERAL METERING . maintain all required metering and workspace clearances. Irrigation and outdoor garden/landscaping sprinkler controllers. generators. Ltd. The height of the meter closet must be at least 7 feet. Meter closet working space. 2. Inc..SEVENTH EDITION 4'-0" 11" " GENERAL OVERHEAD UNDERGROUND METERING OTHER 6" Meter bank or CT cabinet Meter cabinet 6" 4'-0" 4'-0" Top View Notes: 1. Figure 4-5..ELECTRIC SERVICE INSTALLATION MANUAL . . Inc. • Maui Electric Co. 50 Hawaiian Electric Co.. Provide at least 11 inches clearance between the face of the meter socket panel and the closet door. • Hawaii Electric Light Co. OVERHEAD GENERAL METERING . clearance at sides of the meter socket Meter Meter Meter or CT cabinet 6" min. clearance at sides of the meter socket 4'-0" min. 51 Hawaiian Electric Co. Meter room working space. Ltd. clearance at sides of the meter socket CT cabinet 4'-0" 6" 4'-0" minimum Top View Figure 4-6. Inc. OTHER METERING UNDERGROUND Provide 6" minimum height clearance above all meter sockets... Inc. • Hawaii Electric Light Co. in front 0 n on of each meter ac me 4'-0" minimum in front of each meter f h Top View 6" Meter 1'-0" Meter Future metering equipment 6" min. • Maui Electric Co..6" min. GENERAL OVERHEAD UNDERGROUND METERING OTHER Meter 6" min.. pedestals. clearance at sides of the meter socket 6" min. selfsupporting enclosures or structures constructed for installing or housing electric service and metering equipment. Inc. or There is no facility or building near the area of service for this equipment. Meter 4'-0" min. Inc. Ltd. clearance from front of adjacent metering panels x x x x 4'-0" min. and steel-post structures are permanent. • Hawaii Electric Light Co. • Maui Electric Co.SEVENTH EDITION 4'-0" min. They are acceptable for installing service and metering equipment when: • • • Equipment cannot be installed on an exterior wall. irrigation service. Examples: Traffic signal service. clearance at sides of the meter socket Provide 6" minimum height clearance above all meter sockets 12" min.ELECTRIC SERVICE INSTALLATION MANUAL . 4'-0" min. Freestanding Meter Enclosure. 52 Hawaiian Electric Co. and Steel-Post Structure Freestanding meter enclosures.. 4'-0" min. x Top View x 12" x Chainlink fence or other permanent barrier to prevent public access x Meter 12" .. and Adequate wall space in an approved location is not available. Top View Figure 4-7. Pedestal. Enclosed area working space. next page. • Maui Electric Co. 3" 4" × 6" opening for meter reading clear plexiglass covering. Inc. Inc. Freestanding Meter Enclosure OVERHEAD 53 Hawaiian Electric Co. cabinets. Enclosures. The customer may elect to use stainless steel equipment. 3/8" rounded edges all around Finish grade 6'-0" max. A freestanding meter enclosure is an enclosure that houses or provides physical protection for service and metering equipment. (for each meter).. Double locking bar with padlock See Note 2. Free-standing meter enclosure. • Hawaii Electric Light Co. OTHER METERING UNDERGROUND GENERAL METERING . Ltd. or equipment subjected to corrosive environments (for example.Enclosures. or equipment installed outdoors must be rain-tight and have a 3R rating or higher. by NEMA. near coastal areas) should have a NEMA 3R Stainless Steel rating. See Note 1. cabinets... 11" Meter enclosure NEMA 3R Finish grade Ground rod by customer per NEC Side View Section A Figure 4-8a. 3" 3" 4" × 4" butt hinges Earth to be tamped around pad after installation A Front View B (See next page) Mounting provisions See Note 3. the meter socket is mounted so the center of the commercial by-pass is not lower than 3 feet from the finish grade. sealable* Concrete slab Finish grade 4" 4" min. The meter is placed so the window will face the public access way. Reinforce the concrete pad with #4 bars at 12 inches on-center. The customer and the power company to provide one padlock each. The maximum height of the center of the meter socket is not greater than 6 feet from the finish grade. 4. All enclosure sections needing power company access have at least 4 feet workspace clearance in front of the section doors. metal struts. Free-standing meter enclosure.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER See Detail 1 3' min. 5. height from finish grade to center of commercial by-pass device Meter socket Commercial by-pass area Splice can.. and cured at 3000 PSI strength for 28 days. Ltd. Provide a minimum clearance of 6 inches from the top and sides of the meter socket panel to the enclosure lip (if applicable). 9. 7.. • Maui Electric Co. If the pulling distance is less than 70 feet. Inc.and termitetreated (example: Wolmanized). between meter socket enclosure and cabinet lip Detail 1 6" min. This applies to only rate schedule G and R. The finished ground surrounding the enclosure must be level and clear to allow for the use of a ladder. the splice can may not be required (200 Amp residential services only). Grounding by customer per NEC Meter enclosure Enclosed breaker 6'-0" max. 6. A viewing window is not required for rate schedule J or demand accounts. . 54 Hawaiian Electric Co. Plywood backboards have a minimum thickness of three-quarters inch and are pressure. Notes: 1. Provide a minimum clearance of 11 inches from the face of the meter socket panel to the enclosure’s door. Inc.. 2. Secure the enclosure to a concrete pad with 4-5/8 inch diameter anchor bolts. Any enclosure sides that are not accessible must have a minimum clearance of 2 feet to allow maintenance. See utility for conduit size Meter enclosure by customer Meter socket provided by customer 6" min. • Hawaii Electric Light Co. The 4" x 6" meter viewing window is aligned over the meter so the meter can be easily read. or plywood. 8. Paint the enclosure with one coat of shop primer followed by two coats of epoxy enamel finish. Metering equipment is mounted within the enclosure by metal brackets.ELECTRIC SERVICE INSTALLATION MANUAL . between meter socket enclosure and cabinet lip Section B Figure 4-8b. The concrete pad has a minimum thickness of 6 inches. 3. *MECO only. For commercial installations. . Free-standing meter enclosure working space.. to allow the meter electrician to see and align the meter blades to the meter socket jaws. A free-standing meter enclosure must allow a 6-inch clearance at top and left side of meter socket to the enclosure rim.. • Maui Electric Co. 55 Hawaiian Electric Co. Inc. • Hawaii Electric Light Co. OTHER Figure 4-10.4'-0" 4'-0" Finish grade Concrete pad 2'-0" 2'-0" Free-standing meter enclosure 4'-0" Top View Figure 4-9. Ltd. Inc. METERING UNDERGROUND 4'-0" OVERHEAD GENERAL METERING . ELECTRIC SERVICE INSTALLATION MANUAL - SEVENTH EDITION Test bypass cover and facilities. See Note 8. Meter section barrier to extend to edge of test block barrier Barrier between test block and wireway pull section Protective metallic barrier. See Note 7. See Note 6 Finished ground line Load line 3" min GENERAL OVERHEAD UNDERGROUND METERING OTHER Free-Standing Meter Pedestal* A free-standing meter pedestal is an enclosure prefabricated at the factory for use for service and metering equipment. Submit manufacturer’s drawings of the meter pedestal to the power company before purchasing. The power company will need to physically inspect and accept the meter pedestal before installation. *Not allowed for County of Hawaii (Kona-Hilo) Demand reset cover. See Notes 3, 9 and Figure D. Piano-hinge required A Meter enclosure See Note 3 and table below Enclosing cover See Notes 3 and 9 B 6" max Enclosure cover in open position See Note 3 90° max Test bypass support Landing lugs and factory conductors. See Note 2. Wireway pull section and cover. See Figure C and Note 1. 17" min. 4'-6" min. 6'-0" max. See Note 11 Customer section 4" min. Finished ground line Figure A Front View .75" min. Figure B Side View 1.5" typical Minimum dimensions, single-phase service 3" min. W 10.5" 17" min. 2" min. 5" max. W Figure C Wireway Pull Section A 20" B 11" All dimensions are minimums 4" See also notes on the next page. 6" 2" Viewing window Figure D Demand Reset Cover Figure 4-11. Free-standing meter pedestal. 56 Hawaiian Electric Co., Inc. • Hawaii Electric Light Co., Inc. • Maui Electric Co., Ltd. Figure 4-11 Notes: 1. Wireways have the minimum dimensions shown in the table in Figure 4-11. The bottom of the wireway must accept a 3-inch (minimum) conduit. 2. Service conductors are terminated on landing lugs. The service termination lugs must be #6 through 250 kcmil pressure-type CU-AL listed. Insulated cables or bus shall be installed between the landing lugs and the commercial by-pass facility. 3. The meter is enclosed. The enclosure cover is hinged and weighs not more than 25 pounds. Allow a minimum clearance of 11 inches from the face of the meter socket to the enclosure cover. The enclosure cover has a demand reset cover constructed of steel. The reset cover has a hinged polycarbonateviewing window with the minimum dimensions as shown in Figure D. 4. Do not install ringless sockets. 5. Internal equipment is secured without screws or nuts on the outer surface of the enclosure that may be loosened from the outside. 6. Consult the power company for the structural mounting and support of the pedestal. 7. Provide a protective metallic barrier (16-gauge minimum) between the power company wireway and customer distribution section. The protective barrier shall not have a clearance more than 1/4-inch between the power company wireway and customer section to prevent screws and bolts from protruding into the termination section. All unmetered (line side of meter) bus or cable shall be separated by suitable barriers from metered (load side of meter) bus or cable. 8. The pedestal is supplied with commercial by-pass blocks with rigid insulating barriers wired or bussed to the meter socket by the manufacturer. Connection sequence is Line to Load from left to right. Identify each Line and Load position with 3/4-inch (minimum) block letter labeling. Seal commercial by-pass cover panels, and fit them with a lifting handle. For panels exceeding 16 inches wide, install two lifting handles. 9. All power company compartments (meter cover, demand reset cover, and pull section) shall have provisions for the power company’s seal or padlock. 10. Install warning labels indicating high voltage and instructing personnel to stay clear of the enclosure, on the wireway pull section cover and in front of the meter section hinged cover. 11. Enclosure similar to Pacific Utility Products USP-20 series. 12. See EUSERC 308 for further details. 57 Hawaiian Electric Co., Inc. • Hawaii Electric Light Co., Inc. • Maui Electric Co., Ltd. OTHER METERING UNDERGROUND OVERHEAD GENERAL METERING ELECTRIC SERVICE INSTALLATION MANUAL - SEVENTH EDITION 5'-0" min., 6'-0" max. (5'-6" preferred) Grade 4" 6" min. 6" 6" Side View 24" min. GENERAL OVERHEAD UNDERGROUND METERING OTHER Free-Standing Steel-Post Structure A free-standing steel-post structure is a structure made from metal pipes and brackets or supports to mount service and metering equipment. Cap 3" pipe 3" round pipe galvanized steel See Note 4 Rain tight meter socket/main breaker Steel support frame Rain tight splice can See Note 6* Customer's conductors (18" min. coil) Customer to provide provisions for seal by utility** 200# pulling line JRP or equivalent) Concrete footing Rain tight splice can 2-1/2" x 2-1/4" angle iron welded to pipe Customer Power Company Grade Ground per NEC*** 6" 6" 6" Line (utility) Load (customer) Front View 24" min. Notes: 1. Do not use plywood backboards for mounting service and metering equipment – weathering can cause the board to warp or bend. 2. Mount the center of meter socket between 5 feet and 6 feet above the finished grade. 3. The finished ground surrounding the structure must be level and clear to allow for the proper use of a ladder. 4. If the structure will contain any instrument transformers, the support pipes must be 4-inch round pipe galvanized steel, installed to a minimum depth of 30 inches. 5. The power company is not responsible for insufficient structural design to support service and metering equipment. Have all meter support structures reviewed by a qualified professional. 6. Splice can not required for 100-amp residential service. * For HELCO 200-amp service. For MECO when two or more meters are installed. ** MECO only. If the pulling distance is less than 70 feet, the splice can may not be required (200 Amp residential service only). *** HELCO requires two ground rods spaced a minimum of 6’-0” apart. Figure 4-12. Free standing, steel post structure. 58 Hawaiian Electric Co., Inc. • Hawaii Electric Light Co., Inc. • Maui Electric Co., Ltd. Fusible type pull-out devices or similar are not allowed. Location in Circuit. • Maui Electric Co. These are exceptions: • • For a single set of service entrance conductors supplying a multi-meter installation of 2 to 6 meters with individual disconnecting means. In accordance with NEC tap rules. Meter sockets or equipment for future growth shall be furnished and installed at this time. Typically. a main service disconnecting means on the supply side or before the meters may be installed when it is determined that future growth will require more than 6 meters. OTHER METERING UNDERGROUND • OVERHEAD For a single set of service entrance conductors supplying a multi-meter installation of 7 or more meters with individual disconnecting means. Ltd. Inc. Article 240 Overcurrent Protection. Inc.Meter and Main Service Disconnect Configuration The customer must furnish and install a fusible switch. Code 240..21. • Hawaii Electric Light Co. before service is energized. GENERAL METERING . 59 Hawaiian Electric Co. circuit breaker. the electrical code requires a main service disconnecting means on the supply side or before the meters. or other approved disconnecting means to control the service and energy registered by a meter. the disconnecting means or main service disconnect is on the load side.. or after the power company’s meters or metering equipment.. Ltd. • Maui Electric Co.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER Line Meter Limit of six service breakers or switches with fuses permitted Load Load Multiple meter installation without main disconnecting switch A. 60 Hawaiian Electric Co. • Hawaii Electric Light Co. Seven or more meters Figure 4-13. ... Six or fewer meters Service entrance conductor Main disconnecting switch or circuit breaker Possible future meter Meter Service switches or circuit breakers Load Multiple meter installation with main disconnecting switch B. Meter and main service disconnect configuration.. Inc. Inc.ELECTRIC SERVICE INSTALLATION MANUAL . • • • • • • METERING UNDERGROUND The following are general requirements for meter sockets: OVERHEAD GENERAL METERING . For example: 1-2-3-N-G. Metering equipment installed outdoors or exposed to the weather must be rain tight and have a NEMA 3R rating. Use rain-tight plugs outdoors. Inc. When the service requires parallel or multiple conductors.. The customer must label the conductors and identify conductors by phase. or black-red-blue-whitegreen. Use the colors indicated in Table 4-1 for marking three-phase commercial and industrial installations. Only UL (Underwriters Laboratory) and NEMA (National Electrical Manufacturers Association) rated meter sockets and enclosures designed to meet ANSI (American National Standards Institute) standards are acceptable. Meter Sockets • • Only ring-type meter sockets are acceptable. Service Voltage Secondary Primary Service Type 120/208 240... Metering equipment installed in corrosive environments where enclosures will be subjected to salt spray.Conductors The customer is responsible for sizing and installing the service entrance and load conductors in accordance with NEC requirements. Conductor size and type (aluminum or copper) shall be in accordance with rating of meter socket. Install sockets level. OTHER 61 Hawaiian Electric Co. and secured to a permanent or acceptable structure. plumb. • Hawaii Electric Light Co. Bond meter socket enclosures to the grounding system in accordance with NEC. terminal lugs shall be rated and designed to accept parallel or multiple conductors. 4-Wire 277/480 Primary voltage Phase A-B-C Black-Red-Blue Black-Orange (High-leg) -Blue Brown-Orange (High-leg) -Yellow 1-2-3 Neutral White White White White Ground Green Green Green Green Table 4-1. ground or high leg where applicable. Cap or plug unused openings of meter sockets or metering enclosures. Do not recess meter sockets or metering equipment within exterior walls. should be stainless steel with NEMA 3R rating. Color marking service conductors.. industrial discharge. Ltd. • Maui Electric Co. Do not use single terminal lugs to terminate multiple conductors. etc. without approval from the power company. neutral. Inc. SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER Switchboard and Switchgear General Requirements Switchboards and switchgear used for service entrance equipment and for power company metering must be constructed in compliance with latest revision of EUSERC (Electric Utility Service Equipment Requirements Committee) specifications. For remote meter installation for CT metering. • • • • • • • • • 62 Hawaiian Electric Co. Inc. in compartments designated for the power company. etc. the enclosure for switchboard or switchgear must comply with EUSERC specifications. if applicable... Metered buses or cables must not enter or pass through unmetered bus or cable compartments or sections. voltmeters. • Maui Electric Co. Metering compartments and unmetered sections must not be used for splicing or making taps. In addition. instrument transformers. Inc. Provide an acceptable concrete pad (4-inch minimum). Ltd. storage batteries. The customer has these responsibilities: • Submit four sets of manufacturer’s design drawing of switchboard to power company for approval. Ground and bond switchboard or switchgear in compliance with NEC requirements. do not mount customer equipment such as ammeters.ELECTRIC SERVICE INSTALLATION MANUAL . Ground rod or cable tie to building grounding system shall not be installed in HECO sealed pull section. Design drawings of switchboard must reference applicable EUSERC drawings. Provide a minimum clearance of 11 inches from the face of the meter socket panel. Install heaters so they do not interfere with the installation or removal of the power company’s metering equipment. to the enclosure door. An enclosure subject to corrosive environment should be stainless steel with NEMA 3R rating.. See Meter and Main Service Disconnect Configuration section of this manual. • Hawaii Electric Light Co. Connect power for compartment heaters on the load side of metering. Enclosure door(s) must be capable of being opened at least 90 degrees. One set of drawings will be returned to the sender with approval or required corrections. fuses. If outdoors. All removable panels and compartment covers or doors that enclose unmetered buses or cables must have provision for sealing or locking by the power company. relays. battery chargers. before equipment fabrication or construction. and have a latch or locking system to hold the door(s) open. The enclosure must be weatherproof or NEMA 3R rated.. Separate unmetered buses or cables with barriers from metered buses or cables. Metering compartments or sections must be exclusively for the power company’s metering equipment. the conduit (1-1/4 inch) run from the CT compartment to the meter socket must not be more than 50 feet total. . and Figure 4-13 for installations of seven or more meters. or on metering panels or metering compartment doors. Paint bollards yellow per ANSI spec. A 2” wide strip of reflective tape must be placed 6” below the top of the post. The utility's service conductors must be separated from the customer's load conductors by suitable barriers.. 3" 3'0" Meters 3'0" 3'0" Parking spaces or vehicular traffic Concrete encasement 6" to 12" Non-removeable bollard detail Figure 4-14.one for the utility compartment/section for each feeder. OTHER METERING Top view UNDERGROUND OVERHEAD Where there is primary service switchgear.1 to comply with OSHA 1910.144 for color coding. and to allow metering panel doors to open a minimum of 90 degrees. 63 Hawaiian Electric Co. The customer's load conductors must not pass through HECO's sealable/designated sections or compartments. filled with concrete. Use steel piping with a diameter of 4 inches and a minimum wall thickness of 0... there must be at least two sections/compartments -. • • Customer grounds. • Maui Electric Co. Refer to Table 4-3 for switchboard meter mounting heights. Space the posts to prevent vehicular contact of service and metering equipment. install post barriers to protect the switchboard or switchgear. • Hawaii Electric Light Co. See Figure 4-14 for post barriers. and associated grounding equipment. Protect metering equipment located in areas near vehicular traffic with permanent (not removable) barrier posts.• • • If there is risk of vehicular contact. is not permitted within the utility compartment/section. Bollards. Bollards Meters 4'0" min. 4'-0" min. GENERAL METERING . Inc.188 inches. Z535. 3'0" 3'0" 3'0" 3'6" min. and the other for the customer. Inc. Ltd. Install the posts to allow at least 4 feet clearance in front of all metering equipment. The power company provides. Sealing of Meters. 64 Hawaiian Electric Co. Replacing an Existing Meter Comply with the latest requirements of the power company. NEC. Metering Equipment The power company seals all meters. Keep Unmetered Conductors Separate Service entrance conductors that are unmetered must be completely isolated from metered or load conductors. page 73. Ltd. The power company will perform all work such as cutting seal(s) and temporarily removing meter(s) or metering equipment. Self-contained metering is used for service loads of: • • 320 continuous amps or less for single-phase residential service 200 continuous amps or less for three-phase residential service and all commercial services Note: Consider transformer-rated metering when future load plans are likely to exceed the rating for self-contained metering. The customer furnishes.ELECTRIC SERVICE INSTALLATION MANUAL . or wireway. Inc. installs.. owns. • Maui Electric Co.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER The concrete encasement surrounding the post must be at least 6 inches thick in stable soil. and EUSERC when replacing or upgrading service-entrance conductors and service and metering equipment. and service entrance equipment on the line side of the meter. or 12 inches thick in sandy or unstable soil. The power company must perform all work such as cutting seals or entering sealed enclosures or compartments. Before excavating. Inc. metering equipment. Separate line and load conductors by barriers to easily distinguish them from each other. city. installs. Line conductor wireways or compartments shall have provisions for sealing by the power company. be sure to determine the location of all existing underground services. Self-Contained Metering (0 to 600 Volts) Self-contained meters carry total load current at the supplied service voltage. metering enclosures. The customer must indicate future loads when submitting plans for transformerrated metering. . Unmetered line and metered load conductors must not be located in the same enclosed space. and maintains the meter for self-contained metering.. Sub-Metering Sub-metering or installing a meter after the power company’s meter is not allowed for residential services. county. compartment.. and maintains all self-contained equipment except for the meter itself. owns. See Current Transformer-Rated Metering. • Hawaii Electric Light Co. Before service is provided. single-phase residential services. Use a self-contained meter socket rated for 400 maximum amps. three-wire (network) services in the 9 o’clock position. Ltd.Classification of Service Voltage 120/240 120/208 240 120/208 Y 277/480 Y Phases 1 1 3 3 3 No... and not less than 100 amps. Three-phase meter sockets for residential services must be equipped with a commercial test by-pass/disconnect facility. Mark or identify the covers. OVERHEAD GENERAL METERING . single-phase. • Hawaii Electric Light Co. Inc. Cardboard inserts in place of plastic or glass covers are not acceptable. The requirements for self-contained meter sockets are: • • • • A maximum ampacity rating not less than the ampacity rating of its associated main service breaker or disconnect. 65 Hawaiian Electric Co. of Wires 3 3 4 4 4 Self-Contained Meter Socket Number of Jaws 4 5 7 7 7 Table 4-2. so they can be returned to the customer after meters are installed. Also. the customer shall provide and install meter socket covers (plastic or glass) and meter bands for all blank meter sockets. Use a meter socket similar to Circle AW catalog numbers U404MC or U4042MC. Residential Service Self-contained meter sockets for single-phase residential service must not contain a commercial test by-pass/disconnect facility. OTHER METERING UNDERGROUND Only plug-in-type jaws or terminals with stainless steel spring mounted retaining clips are acceptable. • Maui Electric Co. Use transformer-rated metering when present or projected loads exceed 320 continuous amps. For this type metering: • • • Use 320-amp self-contained metering for 120/240 volt. 4-jaw. or a lever by-pass. Install the fifth terminal for 120/208 volt. Inc. Number of meter socket jaws for self-contained meters. The maximum load is 320 continuous amps. See Figure 4-16. do not use bladed plastic covers. 320 Amp Self-Contained Metering Class 320 metering is recommended for service demand loads from 42 kW to 72 kW.. The socket must not contain a Manual Circuit Closing (MCC) by-pass. . The maximum main circuit breaker rating shall not exceed the meter socket continuous amp rating. 5th jaw 9 o'clock position line load line load line load N Ground per NEC Figure 4-16. Inc. single-phase. 3-wire. . line load line load N Ground per NEC Figure 4-15. The commercial test by-pass/disconnect (safety socket) facility makes it safe for power company personnel to work on a de-energized meter socket without interrupting service to the customer.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER Commercial Service Self-contained meter sockets for commercial installations shall be equipped with a commercial test by-pass/disconnect facility. • Hawaii Electric Light Co. 120/240 volts. . 66 Hawaiian Electric Co.. 3-wire. 4-jaw. 120/208 volts. 5-jaw. • Maui Electric Co. Ltd. Label the line and load terminals on by-pass terminals. Meter socket wiring.. single-phase. Meter socket wiring.ELECTRIC SERVICE INSTALLATION MANUAL . Inc. Additional meter sockets or service equipment installed after the initial installation to be grouped or located at the same location of electric meters serving the premises. Inc. To insure proper connections. Only meter sockets with safety test bypass blocks.High leg. Meter socket wiring. 240 volts Note: For three-phase.. 208 volts to ground. are acceptable. OTHER UNDERGROUND OVERHEAD GENERAL METERING . unless otherwise approved by the power company. Ltd. Orange wire. 4-wire Y 120/208 or 277/480 volts 7-Jaw 3 phase.. or meter sockets that can be completely de-energized without affecting the customer. install the high leg (208 volts) at the upper-right meter jaw and mark it appropriately. and HQ-type (lever bypass) meter sockets are not acceptable. • Maui Electric Co. • Hawaii Electric Light Co. 4-wire delta services.. Figure 4-17. Submit the plan drawings showing the grouped meter installation to the power company for approval before purchasing metering equipment. Meter sockets containing manual circuit closing bypasses. See note below line load line load line load line load line load line load N Ground per NEC N Ground per NEC 7-Jaw 3 phase. the customer marks the high leg plainly at the weatherhead. consult with the power company to determine an acceptable meter location. Manual Circuit Closing (MCC) Bypass and HQ Sockets METERING 67 Hawaiian Electric Co. 7-jaw socket. Also. Grouped Meter Installations A grouped meter installation is an arrangement of two or more individually mounted meter sockets installed at a single location. Grouped meters are usually supplied from a single electrical service. Inc. 4-wire delta. Top View Side View Figure 4-18. Mount the line gutter as close as reasonable to the meter sockets (within approximately 4”) for ease of inspection and sealing. • Hawaii Electric Light Co. • Maui Electric Co.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER Grouped meters have the following mounting height requirements: For grouped meters at locations accessible to pedestrian traffic or public contact: the meter mounting heights shall be between 5 feet and 6 feet. 5'-6" preferred mounting height 6" min. clearance at sides of meter socket 4'-0" min. Sealable line gutter Meter sockets 6'-0" max. Inc. measured from the finish floor to the center of the meter socket. 5'-0" min.. Grouped meters installed outdoors. Ceiling 6" min. See Meter and Main Service Disconnect and Sequence section and Figure 4-13 for group meter installations of seven or more meters. Do not install the main service disconnect ahead (or line side) of meters for six or less grouped meters. Acceptable for residential single-phase service. Contact and coordinate with the power company for work that requires entering a sealed line gutter. 5'-0" min. 3. Ltd. ... Inc. 68 Hawaiian Electric Co. Provide provisions for sealing the line gutter.. Notes: 1. and for commercial single-phase and three-phase services. clearance from meter socket surface 6" min. Load conductors shall not enter or run through a line gutter. 5'-6" preferred mounting height Load gutter Finished ground line Front View Ceiling 4'-0" min. clearance Finished ground line 6'-0" max. 2. 4.ELECTRIC SERVICE INSTALLATION MANUAL . and accessible to pedestrian traffic. For grouped meters at locations not accessible to pedestrian traffic or public contact such as in a meter room, meter closet, or an enclosed area that can be locked: the meter mounting heights shall be between 4 feet 6 inches and 6 feet 6 inches, measured from the finish floor or grade, to the center of the meter socket. Ceiling 6" min. Sealable line gutter Load gutter Finished ground line Front View Ceiling 4'-0" min. clearance from meter socket surface 6'-6" max. 4'-6" min. 5'-6" preferred mounting height 3'-0" max. 3'-0" max. Post-type barriers 4'-0" min. clearance Finished ground line 6'-6" max., 4'-6" min. 5'-6" preferred mounting height 3'-0" max. 3'-0" max. Post-type barriers 6" min. Top View Side View Figure 4-19. Grouped meters in a meter closet, and not accessible to pedestrian traffic. Notes: 1. Acceptable for residential single-phase services and commercial single-phase and three-phase services. 2. Meter closets located in parking lots require post barriers. Maintain 4 feet workspace clearance. Spacing between posts shall be 3 feet. 3. See Meter and Main Service Disconnect and Sequence section and Figure 4-13 for grouped meter installations of seven or more meters. Main service disconnect shall not be installed ahead (or line side) of meters for six or less grouped meters. 4. Provide provisions for sealing the line gutter. Load conductors shall not enter or run through line gutter. Contact and coordinate with the power company for work that requires entering a sealed line gutter. 5. Mount the line gutter as close as reasonable to the meter sockets (within approximately 4”) for ease of inspection and sealing. 69 Hawaiian Electric Co., Inc. • Hawaii Electric Light Co., Inc. • Maui Electric Co., Ltd. OTHER METERING UNDERGROUND OVERHEAD Meter sockets GENERAL METERING ELECTRIC SERVICE INSTALLATION MANUAL - SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER Meter Centers Meter centers or meter banks are prefabricated service entrance equipment that combines the service termination section, metering section(s), and distribution section. A meter center is installed where an individually metered distribution center is required. Meter centers are primarily used for multi-family dwelling units, commercial units, and light industrial applications. The following are requirements for meter center installations: • • Submit manufacturer’s drawings showing dimensions of meter center for approval prior to ordering. Suitable barriers must separate the line (unmetered) bus and conductors from the load (metered) bus and conductors. Equip house meter sockets with a commercial test by-pass facility. Meter centers shall have the following meter mounting height requirements: 1. 1. For meter centers in locations not accessible to pedestrian traffic or public contact such as a meter room, meter closet, or an enclosed area that can be locked: • For commercial installations, meter mounting heights shall be no lower than 3 feet high, and no higher than 6 feet 6 inches. Height measurements made from the finish floor or grade to the center of the meter socket jaws.* For residential installations, meter mounting heights shall be no lower than 3 feet high, and no higher than 6 feet 6 inches. Height measurements are made from the finish floor to the center of the meter socket jaws.* • 2. For meter centers in locations accessible to pedestrian traffic or public contact: Meter mounting heights, measured at the center of the meter, are between 4 feet 6 inches and 6 feet, measured from the finish floor or grade to the center of the meter. • Submit the manufacturer’s catalog dimensional diagram and specification sheet for approval. *MECO only: Minimum height of 3 feet is measured from finish grade to center of meter socket. 70 Hawaiian Electric Co., Inc. • Hawaii Electric Light Co., Inc. • Maui Electric Co., Ltd. Customer's service entrance conductors Sealable wiring gutter. May be located at bottom of panels. Circuit breaker. May be located at top or side of meter panels. Six meters or less without main switch Customer's service entrance conductors Typical house meter socket. Commercial by-pass is required for commercial account. Main switch Commercial by-pass area Circuit breaker Seven meters or more with required main switch Figure 4-20. Quick-stack meter centers with meter socket breaker provisions. For single-phase service cubicles. Figure 4-21. Manufactured combination multi-meter service equipment. 71 Hawaiian Electric Co., Inc. • Hawaii Electric Light Co., Inc. • Maui Electric Co., Ltd. OTHER With spacer kit and stack units METERING UNDERGROUND OVERHEAD GENERAL METERING clearance Switchboard 6" max. • Hawaii Electric Light Co. Inc. Pad Front View Figure 4-22.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER Solid floor required if meter is located at 6'-6" maximum height Pad 4'-0" min. .ELECTRIC SERVICE INSTALLATION MANUAL . 72 Hawaiian Electric Co.. 6" max. Inc. Ltd. in front Top View 4'-0" min.. Pad Side View Finished ground line 6'-0" max. 4'-6" min. in front 4'-6" min. clearance 6'-0" max. Meter heights and workspace clearance for outdoor switchboard accessible to public contact.. • Maui Electric Co. 73 Hawaiian Electric Co. clearance 6'-6" max. OTHER METERING UNDERGROUND OVERHEAD GENERAL METERING . 6'-6" max. Inc. in front Top View 4'-0" min. Meter heights and workspace clearance for indoor switchboard in meter room not accessible to public contact. clearance Switchboard 6" max. • Hawaii Electric Light Co. 2. Ltd. For commercial installation.Solid floor required if meter is located at 6’-6” maximum height.. Finished ground line Front View 3'-0" Pad min. 6" max. Inc.. • Maui Electric Co.. Pad 4'-0" min. For residential installation. *MECO only: For commercial installation. in front 3'-0" Pad min. the minimum height is 3 feet from finish floor to the center of the meter socket. *3'-0" min. Notes: 1. the minimum height is 3 feet from finish floor to the center of the meter socket. *3'-0" min. the minimum height is 3 feet from finish floor to the center of the commercial test by-pass area. Side View Figure 4-23. Inc. meter closet. (MECO only. manufacturing. Commercial enclosed area not accessible to the public Free-Standing Meters Residential. and maintains all equipment. Consult with the power company before purchasing. or Residential. to the center of the meter socket(s). • Maui Electric Co. HELCO and MECO customers shall install the instrument transformers provided by the company. and receive approval from the power company before purchasing or installing this equipment. Ltd. The power company owns. meter closet. . Outdoors.ELECTRIC SERVICE INSTALLATION MANUAL . conduits or raceways. Metering With Instrument Transformers Instrument transformers (current transformers or CTs. * Minimum height of 3 feet is measured from finish grade to center of the commercial test by-pass area. Minimum height of 3 feet is measured from finish grade to center of meter socket. The customer furnishes.. and meeting the installation requirements described below. Submit plans of the installation. instrument transformers. and materials needed for instrument transformer metering.. Commercial Minimum Preferred Maximum 5’-0" 4’-6" 5’-6" 5’-6" 6’-0" 6’-0" See Figure In a meter room. Commercial enclosed area not accessible to the public Grouped Meters Accessible to public contact Residential. test switch. The metering equipment must be installed in a readily accessible location acceptable to the power company. and the wiring between these items. *HELCO and MECO only. Commercial Residential Commercial 3’-0"* 5’-6" 6’-0" 4-8b 4’-6" 3’-0" 3’-0"* 5’-6" 5’-6" 5’-6" 6’-0" 6’-6" 6’-6" 4-22 4-23 4-23 Notes: Meter heights are measured from finish grade or floor. and voltage/potential transformers or VTs) are used for metering when the electrical service exceeds the voltage and/or current ratings of self-contained meters.. and maintains the meter.) Table 4-3. meter closet. Meter heights. or Residential. Inc. provides. or installing instrument transformer metering equipment. or enclosed area not accessible to the public Residential. • Hawaii Electric Light Co. wires. Commercial 5’-0" 4’-6" 5’-6" 5’-6" 6’-0" 6’-6" 4-18 4-19 In a meter room. installs. 74 Hawaiian Electric Co.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER Mounting Heights For Self Contained Meters and CT Meters (Up to 600V) Location and Description of Meter Installation Individual Meters Accessible to public contact Service Residential. free-standing meter enclosure Commercial Switchboard Meters and Meter Centers Accessible to public contact In a meter room. installs*. Inc. The conduit run must not exceed 50 feet in length or have more than two 90-degree bends. Use the next larger • • • OTHER UNDERGROUND 5 OVERHEAD Note: If the customer requests CT metering when load currents are below these requirements but not less than 100 amps... • Hawaii Electric Light Co. Inc. The customer: • Provides and installs the CT cabinet ahead of the main breaker or disconnect. Install the CT cabinet on the line-side of the main disconnect unless otherwise required by NEC and/or approved by the power company. The minimum size of the CT cabinet is shown in Table 4-5. See Table 4-4. or 200 amps for three-phase residential service. Current transformers are mounted in cabinets or enclosures for safety and protection. Ltd. with the number of jaws to match the service type. Provide and install a 1-1/4" conduit between the meter socket and the CT cabinet. Classification of Service Voltage 120/240 120/208 2400 7200 120/208Y 277/480Y 2400/4160Y 7200/12470Y 14400/25000Y Phases 1 1 1 1 3 3 3 3 3 How Many Wires 3 3 2 2 4 4 4 4 4 Transformer-Rated Meter Socket How Many Jaws 8 8 5 13 13 13 13 13 Table 4-4. The meter socket shall have provisions to install a test switch. or will exceed any of these load currents: • • • 320 continuous amps for single-phase residential service. Provide and install the meter socket. Allow at least 6 inches clearance between the meter socket enclosure and the CT cabinet. GENERAL METERING .Current Transformer-Rated Metering (0 to 600 Volts) Current transformers are used for metering when the load exceeds. Current Transformer Cabinet Installation METERING 75 Hawaiian Electric Co.. or 200 amps for single-phase or three-phase commercial service. • Maui Electric Co. when the meter socket and CT cabinet are mounted next to each other. Number of meter socket jaws for transformer-rated meters. the customer will be charged for the equipment and labor to install CTs. to mount transformers. 4-25 and 4-26. • Maui Electric Co. unless permitted by the power company. Inc. CT cabinets are limited to no more than four sets of 500 kcmil conductors per phase. or consult with the power company. • Consult with the power company when installing more than four sets of 500 kcmil conductors per phase. • 76 Hawaiian Electric Co. Ltd. Inside the CT cabinet..ELECTRIC SERVICE INSTALLATION MANUAL .. . Use a switchboard when there are 4 or more sets of 500 kcmil conductors per phase..SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER cabinet size if the conductor size is not listed. Cabinet Size W” × H” × D” 30 × 30 × 11 36 × 36 × 11 42 × 42 × 11 36 × 48 × 11 48 × 48 × 11 Maximum Number and Size of Conductors One #3/0 per phase or smaller One 500 kcmil per phase or smaller Three 500 kcmil per phase or smaller Three 500 kcmil per phase or smaller with side entrance cables only Consult the power company Table 4-5. Inc. See Figures 4-24. install mounting brackets types C and Z. Minimum sizes for instrument transformer cabinets. Coordinate this with the power company. • Hawaii Electric Light Co. Inc.. Ltd. • Hawaii Electric Light Co. OTHER METERING Connect the horizontal C brackets to the vertical Z brackets as shown. 77 Hawaiian Electric Co.. Instrument transformer cabinet with C and Z bracket mounting. HECO only: Center the brackets within the CT cabinet and secure the Z brackets to the CT cabinet with 3 self-tapping screws spaced evenly apart.Vertical Z bracket CT cabinet Horizontal C bracket Cover CTs or VTs furnished by power company CT cabinet Horizontal C brackets (flat) Vertical Z bracket located at the end of the C bracket Isometric View Figure 4-24. See Figure 4-24. Inc.. Do not tighten C brackets for field adjustments. UNDERGROUND Vertical Z bracket located at the end of the C bracket OVERHEAD GENERAL METERING . • Maui Electric Co. inset. CT cabinets and meter sockets installed outdoors must be UL listed and weatherproof with a NEMA 3R rating. The grounding electrode conductor shall not pass through CT cabinet or power company-sealed enclosures unless authorized by the power company.. Ltd. must have two-piece covers. . Inc. Inc. CT cabinets 42 inches wide or more. • Maui Electric Co. Only conductors associated with metering shall be permitted in the CT cabinet.. 78 Hawaiian Electric Co. The CT Cabinet must have two fixed solid handles for lifting. Bond the CT cabinet and meter socket enclosure per the NEC. • Hawaii Electric Light Co. C and Z bracket installations. Enclosures subjected to corrosive environments. The top of the CT cabinet must not exceed 6 feet above the finish floor or grade. unless approved by the power company. No splices or feeder taps.ELECTRIC SERVICE INSTALLATION MANUAL . The bottom of the CT cabinet must not be lower than 12 inches above the finish floor or grade. excessive moisture or salt spray should be Stainless Steel (SS) with a class rating of NEMA 3R..SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER Do not tighten Self-tapping screw Z bracket “C” bracket Figure 4-25. 79 Hawaiian Electric Co. Plywood backboard is not an acceptable support for CT cabinets mounted outdoors. HECO only: Provide a minimum of 2 full coil loops in the cabinet. Consult with the power company prior to installation. • Maui Electric Co. • Hawaii Electric Light Co. Line 6'-0" max. Instrument transformer cabinet installation (with rigid conduits). Bonding lug min. 3. or sufficient conductor lengths to terminate at both the splice can and main breaker or disconnect switch. OTHER METERING UNDERGROUND 1-1/4" conduit Test switch mounting bracket OVERHEAD Mount the CT cabinet level and secure to a permanent or acceptable structure. Finish grade 6'-0" max.. Vertical Z mounting bracket (typical) Horizontal C mounting bracket (typical) 50' max.. Provide sufficient conductor lengths within the CT cabinet for the installation of CTs and the termination of conductors. Inc. Watthour meter See note 3. Inc. #8 bonding wire Load See note 3. 5'-0" min. Notes: 1.. HECO only: Customer to supply sleeves for splicing all conductors other then 350 and 500 kcmil. 5'-6" preferred Figure 4-26. GENERAL METERING .The cabinet shall have provisions for sealing by the power company. Ingress and egress conduits shall be positioned on diagonally opposite corners of the CT cabinet. when required Instrument transformer cabinet 1'-0" min. Neutral. Ltd. 2. current transformers and potential transformers for metering. or enclosed area not accessible to public contact Switchboard Accessible to public contact Within a meter room. The customer has these responsibilities: 80 Hawaiian Electric Co.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER Switchboard Installation with Instrument Transformers The following are customer responsibilities: • • The metering compartment or CT compartment must be on the supply side (line side) of the main breaker or disconnect. • • CT Meter Mounting Heights (Up to 600 Volts) Location. . For CT compartment door with a meter socket panel and a blank panel (see EUSERC drawings 325. rate schedule. Commercial Residential. • Hawaii Electric Light Co. Description of Meter Installation CT Can Accessible to public contact Within a meter room. • Maui Electric Co. Inc. Mounting heights for transformer-rated meter installations for secondary services up to 600 volts. to the center of the meter socket. Commercial 5’-0" 4’-6" 5’-6" 5’-6" 6’-0" 6’-0" Service Minimum Preferrred Maximum Note: Heights are measured from finish grade or floor. 326 & 332). test switch(s) and associated wiring. or outside of the power company’s sealable compartments. High Voltage Metering (Over 600 Volts) The voltage and service type supplied to a customer depends on the load. to operate as a single door. meter closet. place the meter socket panel at the lower section of the compartment door with the blank panel placed above. or enclosed area not accessible to public contact Commercial Commercial 5’-0" 4’-6" 5’-6" 5’-6" 6’-0" 6’-0" Residential. Table 4-6.. HECO also furnishes and installs the meter(s).. Switchgear used for service entrance equipment and power company metering must comply with EUSERC specifications. Ltd. and type of electric service available in the locality. Inc. meter closet.ELECTRIC SERVICE INSTALLATION MANUAL . Secure both the meter socket panel and the blank panel together. HECO only: The power company supplies and installs the primary voltage. Locate the ground conductor connection to the ground rod (or grounding electrode system) in the main breaker compartment. Install the meter socket panel door so the test switch opening is located on the hinge side of the door.. switchgear must have a VT disconnect with an interlock system and viewing window of disconnect blades. • • Furnish switchgear with insulating boots or covers. Switchgear must have mounting racks or supports for potential transformers. See EUSERC drawing 400. and supplies and installs the associated meter wiring. Switchgear must have adequate space between panels and facilities to install meter(s). Provide grounding knobs on line and load side of bus at each current transformer location for safety grounds. • Maui Electric Co. The electrical contractor terminates the service conductors. Also. Inc. test switch(s). Do not mount equipment on the floor or ceiling within 6 inches of the switchgear. Consult the power company for specifications and requirements. Furnish switchgear with 1-inch conduit for secondary wiring of instrument transformers. • Hawaii Electric Light Co. installs the power company supplied current transformers and potential transformers for metering. or an insulated bus at CT termination points. Provide an acceptable concrete pad (4-inch minimum). the customer supplies the primary leads from the fuse holders to VT terminals. The customer is responsible for supplying primary fuses for potential transformers. test switch(s).MECO only: The electrical contractor shall install the power company supplied primary voltage potential and current transformers for metering. Switchgear VT fuse mounting clips must be constructed to accommodate current limiting fuses. and auxiliary devices furnished by the power company. Inc. Consult with the power company for wiring space requirements behind the meter. See Figure 4-27. • Switchgear must be designed so the power company’s voltage/potential transformers are tapped before or on the line-side of the power company current transformers.. Permanently label switchgear metering compartments with machine engraved laminated phenolic (or equal) tags. Also. and terminates the associated wiring.. Use quarter-inch white letters and numbers on red-colored material that is readily visible and attached to metering compartments.. UNDERGROUND 81 Hawaiian Electric Co. See EUSERC drawing 400. Provide self-shorting and non-shorting terminal blocks (6-point terminals) for instrument transformer secondary wiring. HELCO only: The power company supplies and installs the primary voltage service conductors. Ltd. HELCO furnishes and installs the meter(s). • • • • • • • OTHER METERING OVERHEAD GENERAL METERING . revision 2010. dimensions. sheet 2. 2. Wiring space 11" 90° min opening 90° min opening Top View Outdoor NEMA 3R door shown See EUSERC drawing 407 Pulling eye 18" 18" 4" No-load voltage transformer disconnect No-load voltage transformer disconnect A See EUSERC drawing 407 for CT info A See Note 7 36" 36" 1-inch conduit for VT and CT secondaries See Note 6 See Note 4 30" CT H 1-inch VT and CT conduits located on hinged meter panel 30" N 6" E Front View N F N G D I See EUSERC drawing 407 VT 6" 11 C Side View B Notes: 1.ELECTRIC SERVICE INSTALLATION MANUAL . . • Maui Electric Co.. Note 8.. Primary taps for VTs must be connected to the line-side of metering CTs. For rear access door details. 6. shown here as a thru-wall insulator mounted on either side of the VT compartment. 7.400 to 25. 3.. 82 Hawaiian Electric Co. Consult power company for wiring space requirements behind panel. Ltd. Reference: EUSERC drawing 401. Metering enclosure for high voltage (2.000 volts). Flush-mounted meters require a minimum of 10 inches wiring space. see EUSERC drawing 400. See Table 4-1 for clearances. • Hawaii Electric Light Co. Customer to supply HV leads with lugs from fuse holder to VT terminals. Consult power company for neutral bushing details. Figure 4-27. Customer to supply and stock VT fuses similar to Cuttler Hammer 15 CLPT-5E. Sheet 2. 4. Inc. Inc. Cat #677C452G03.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER 4" min. 5. . phase to phase Dimension A Dimension B Dimension C Dimension D Dimension E Dimension F Dimension G Dimension H. Primary Metering on a Power Company Pole Contact the power company’s Customer Installations Department for the requirements for outdoor pole-mounted metering. Specialized Metering 1) Pulse Metering Output (KYZ Output) Pulse outputs or KYZ outputs are dry contact signals from the company’s electric meter that indicate kWh (and kVarh if applicable) consumption. Refer to Figure 4-27. • Hawaii Electric Light Co. Note: The pulse receiving equipment shall be compatible UNDERGROUND OVERHEAD GENERAL METERING . Ltd. After a service request is received. Meter enclosure clearances.. fuse ferrule diameter Dimension I 2400V 3-1/2" 5" 5" min 10" max 24" 24" 12" min 36" min 42" min 48" max 36" min 8-1/2" 1-5/8" 18" 4160/4800V 3-1/2" 5" 5" min 10" max 24" 24" 12" min 48" min 42" min 48" max 36" min 8-1/2" 1-5/8" 18" 7200/17000V 20800/25000V 6" 7-1/2" 8" min 10" max 24" 24" 12" min 48" min 42" min 48" max 36" min 11-1/2" 1-5/8" 18" 7-1/2" 9" 9" min 15" max 36" 36" 12" min 60" min 56" min 60" max 48" min 15" 1-5/8" Consult power company Table 4-7.. METERING OTHER 83 Hawaiian Electric Co. A service request is submitted to the company’s Customer Installations Department. phase to ground Minimum bare bus clearance. the dry contacts toggle back and forth. • Maui Electric Co. a department representative will call to get further information. The following information is required: • The maximum rate at which the EMS or pulse receiving equipment can accept pulses. As the meter registers consumption. This type of output is usually provided for use in managing electricity usage through a customer-owned Energy Management System (EMS). The change in relay state indicates pulses from the meter and is proportional to the customer’s energy usage. fuse mounting clip center Dimension H. The following are requirements for this service: 1. Inc. KYZ outputs can be provided in a three wire (form “C” contacts) or a two-wire (form “A” contacts) format. Inc.Specifications Minimum bare bus clearance. For a metering switchboard installation. instrument transformers. The customer shall install. and for faulty pulse information supplied to the customer. The company will make the pulse output connection to the customer’s wiring at the isolation relay. the customer shall not in any way connect to or utilize the company’s revenue metering potential or current transformers. This work must be coordinated with the company to ensure that the wires are pulled safely. the nominal charge for this service is $600 (subject to change). The company shall not be held responsible or liable for: any inaccurate readings or inaccurate data generated. • Hawaii Electric Light Co.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER with the Company’s metering equipment. for the isolation relay. isolation relay board. Inc. Inc. own. • The customer’s demand (kW) or load. The customer shall pay all costs incurred to provide this service as indicated under Rule 13 of the company’s Tariff.. The company will provide the customer with the pulse weight (kWh/pulse) value to use with their energy management system. and installation of this hardware. 84 Hawaiian Electric Co. • Maui Electric Co.ELECTRIC SERVICE INSTALLATION MANUAL . etc. In both cases.. the customer will be required to pull their wires to the isolation relay. 4. the isolation relay can be mounted to the door of the metering compartment. the Customer will need to provide a sealable junction box (NEMA 3R for outdoors). This includes the cost of a meter that can provide KYZ pulses. Currently. 3. Ltd. 5.). The junction box shall be bonded and 3/4-inch conduit shall be used to connect the splice box to the meter socket. 2. A proposal letter for this service will be sent to the customer by the company’s Customer Installations Department. such as a meter socket installation. Section D. For load control information. an isolation relay board to prevent interference with revenue metering. This charge is for the provision of kWh pulses only and an additional charge will be assessed for kVarh pulses or other special configuration. The accuracy of the Customer’s pulse or alarm receiving equipment shall be the Customer and manufacturer’s responsibility. . The requirements to receive pulses vary according to the physical setup of the customer’s metering service. mounted adjacent to the meter socket. Paragraph 5. the customer may be assessed a monthly charge for maintenance of this service. For other installations.. In the future. and maintain all equipment on the load side of the isolation relay. The company reserves the right to modify the pulse characteristics furnished to the customer whenever it is necessary because of changes in metering equipment (which includes meter. Usually. terminate the cable to a RJ-11 jack at the telephone service panel.. and for ensuring that the line is in working order. (See Remote Interrogation Via Telephone. Ltd. • • • If the customer wants to share an exisiting analog telephone line with HECO.). The customer is responsible for the cost of all phone service charges associated with totalized metering as well as the cost of the installation of the necessary phone lines to each meter. the company may specify totalized metering of coincident demand for installations where the expected demand or load cannot be serviced and metered at a single point. The RJ-11 jack at the telephone service panel shall be labeled with “HECO Meter” and the telephone number. and post the results on HECO's MV-Web Internet portal where the customer can securely access and view this information.2) Totalized Metering of Coincident Demand – Commercial and Industrial. installations that require more than one distribution feeder to serve a single location will require totalized metering. • Run 3/4-inch conduit from the telephone service panel to a JB (junction box) installed next to the meter socket. the customer shall pay HECO for: • • The cost to purchase special metering equipment. For this service. Totalization is accomplished through software based on data acquired through a telephone line connection to individual meters serving each feeder. for the monthly cost for either a dedicated or a shared telephone line used to acquire load profile data from the meter. • Maui Electric Co. Primary Voltage For new installations. Pull CAT 5E telephone cable from telephone service panel to the JB. The JB shall be sized to adequately house and wire a RJ-11 telephone jack (6” x 6” x 4” min. Connect 3/4-inch conduit from the JB to the meter socket. • Hawaii Electric Light Co. The customer shall also be responsible for providing the analog phone line. Inc.. Also. OTHER 85 Hawaiian Electric Co. Any service cost including equipment and labor necessary to maintain this equipment in operational condition. HECO will extract load profile data from the customer's meter using an analog dial-up telephone connection. a 120 volt AC outlet must be provided for HECO’s telephone line sharing device. Terminate cable in JB with a RJ-11 telephone jack. and the labor to install it at the customer's premise. Inc. HECO will install customer premise equipment in accordance with the guidelines which appear in the following paragraphs.. METERING Current Transformer (CT) Cabinet Installation UNDERGROUND OVERHEAD GENERAL METERING .) 3) Remote Interrogation Via Telephone For customers who do not wish to purchase their own dedicated energy management system (EMS) to monitor their peak electrical loads. Using PowerTrax. Installation shall be installed in accordance with NEC requirements. HECO has a web-based alternative called PowerTrax. .. Terminate the cable in the compartment with a RJ-11 telephone jack. designed to energize the customer’s electrical system. contact HELCO’s Engineering Department at (808)969-0322.. For power generation greater than 100 kW. MECO customers HELCO customers • • 86 Hawaiian Electric Co.ELECTRIC SERVICE INSTALLATION MANUAL . • Maui Electric Co. Pull CAT 5E telephone cable from the telephone service panel to the meter socket compartment. This applies to all permanent or portable emergency or standby sources. The RJ-11 jacks shall be labeled with “HECO Meter” and the telephone number. Locate the jack within the panel. Ltd. Leave the telephone jack hanging near the meter socket with some cable slack for field adjustment. If the customer wants to share an exisiting analog telephone line with HECO. contact HECO’s Power Purchase Division at (808)543-4340. terminate the cable to a RJ-11 jack on the telephone service panel end. With Sales to the Power Company HECO customers • • • Contact HECO’s Power Purchase Division at (808)543-4340. Inc. Installation shall be in accordance with NEC requirements. and follow the noted requirements for approval: Parallel Operation. Run the telephone cable along the hinge side of the compartment door to the meter socket. Also. For power generation greater than 100 kW. • • • • 4) Customer Generation No electrical connections shall be made to the service entrance conductors or electrical service equipment without written approval from the power company. Inc. Contact the indicated power company division/department. prior to installation of any emergency or standby sources of electric service. The customer must notify the power company. a 120 volt AC outlet must be provided for HECO’s telephone line sharing device. contact Maui Electric Company at (808) 871-8461. For power generation up to 100 kW. For power generation up to 100 kW. Install the conduit on the hinge side near the front corner of the meter socket compartment door. • Hawaii Electric Light Co.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER Switchboard Installation • Run 3/4-inch conduit from the telephone service panel to the meter socket compartment of the switchboard. Three types of customer generation Three types of customer generation are available.. contact HECO’s Power Purchase Division at (808)543-4340. In this instance. Per the NEC. and service and metering equipment elevation. The power company provides. Include a one-line diagram showing the interconnection scheme of the stand-by or emergency generator. GENERAL METERING . and have service loads that permit self-contained metering. Inc.Parallel Operation Without Sales to the Power Company HECO customers: Contact HECO’s Energy Services Department at (808) 543-4750 HELCO customers: Contact HELCO’s Customer Services Department (808) 969-0134 MECO customers: Contact MECO’s Engineering Department (808) 871-2390 Stand-By or Emergency Generators (Permanent or Portable) Do not install emergency generators in locations where metering facilities could be subject to noise levels in excess of 85 dB. the customer provides and installs two meter sockets for metering. The emergency transfer device or scheme shall be designed.. Ltd. constructed. Conductors intended for emergency or stand-by power source must not be installed in the same conduits or raceways as the utility’s service entrance conductors. • Maui Electric Co. Inc. place a sign at the service entrance equipment indicating the type and location of the on-site emergency or stand-by power source. and installed to prevent the customer’s emergency power source from feeding back into the utility’s distribution system. A main transfer switch is not required for an emergency or stand-by power source when separate circuits. are used to serve specific equipment. Before any connection is made to an emergency power source. Submit these plans to the utility’s Customer Installation’s Department. Emergency or stand-by power sources must only be utilized when the power company can not provide normal service.. Meter Requirements for Self-Contained Metering (0-600 Volts) The following metering requirements apply to customers with written approval from the power company to interconnect an external generator and the utility’s system. two watthour meters may be used to obtain the delivered and/or received energy.. independent from the customer’s electrical system. building plans approved by the city and the county. UNDERGROUND OTHER 87 Hawaiian Electric Co. • Hawaii Electric Light Co. New Installations Depending on the generation agreement and metering scheme. installs. isolate and separate all ungrounded conductors from utility’s normal supply. service and metering equipment location (top view). METERING OVERHEAD The customer submits to the utility for approval. and maintains the meter(s). seals. 0600 volts. installs. Inc. and interconnecting conduits. New Installations Non Schedule P and Large J Customers Depending on the generation agreement and metering scheme. 88 Hawaiian Electric Co. Example shown: 4-wire wye... installs. the customer provides and installs two meter sockets. seals. seals. two watthour meters may be used to obtain the delivered and/or received energy. two self-contained meters for a commercial service.SEVENTH EDITION line load load load load load line line N N Measures power from utility Measures power from customer Figure 4-28. 120/208 volts or 277/480 volts. The power company provides. and maintains the instrument transformer and meter(s). Interconnection wiring. In this instance. the customer provides and installs an additional meter socket for metering. In this instance. The power company provides. Meter Requirements for Current and/or Potential Transformer Metering The following metering requirements apply to customers with written approval from the utility to interconnect an external generator and the power company’s system with service loads that require current transformers and/or potential transformers for metering. Ltd. and maintains the meter(s).ELECTRIC SERVICE INSTALLATION MANUAL . two watthour/demand meters may be used for metering – one as the primary meter and the other as a back-up meter. line line load line GENERAL OVERHEAD UNDERGROUND METERING OTHER Existing Installations Depending on the generation agreement and metering scheme.. • Maui Electric Co. Inc. • Hawaii Electric Light Co. . and maintains the instrument transformer and meter(s). and maintenance of instrument transformers and test switches. and maintains the instrument transformer and meter(s). two watthour/demand meters may be required for metering – one as the primary meter and the other as a back-up meter. the customer provides and installs an additional meter socket. with interconnecting conduits. The customer also provides analog telephone line connections to the meter(s). if applicable. the customer provides and installs an additional meter socket. In this instance. The power company provides. Existing Installations For Non Schedule P and Large J Customers Depending on the generation agreement and metering scheme.. The power company provides. • Hawaii Electric Light Co. The customer also provides analog telephone line connections to the meter(s). installs. HELCO will terminate all wiring within the instrument transformer cabinet.. The customer marks each meter socket to indicate direction of power flow. and interconnecting conduits. seals. but are not necessarily the only acceptable grounding and bonding methods. two watthour/demand/varhour meters may be used for metering – one as the primary meter and the other as a back-up meter. two watthour/demand/varhour meters may be required for metering – one as the primary meter and the other as a back-up meter. For Schedule P and Large J Customers Depending on the generation agreement and metering scheme. In this instance. The methods shown in these figures meet NEC requirements. wiring. installs.For Schedule P and Large J Customers Depending on the generation agreement and metering scheme. Ltd. Wiring Requirements The customer contacts the power company to determine the responsibilities for the installation. Inc. seals. and maintains the instrument transformer and meter(s). • Maui Electric Co. HELCO only: The customer provides and installs the color-coded conductors. The power company provides. Inc. seals. 89 Hawaiian Electric Co. OTHER METERING UNDERGROUND OVERHEAD GENERAL METERING . and interconnecting conduits. In this instance. the customer provides and installs two meter sockets.. Service Entrance Grounding and Bonding Figures 4-29 through 4-35 show typical grounding and bonding practices. installs. Inc. • Hawaii Electric Light Co. .. Ltd. • Maui Electric Co. 90 Hawaiian Electric Co.. Inc. a continuous bonding jumper can be used to bond service enclosures and conduits Neutral bus bonded to enclosure N Neutral conductor Equipment bonding jumper sized per NEC Grounding electrode conductor Cold water pipe and supplementary ground electrode system Non-Metallic Conduits Neutral conductor N HUB/Grounding bushing (Metallic conduit) Neutral bus bonded to enclosure Grounding electrode conductor Cold water pipe and supplementary ground electrode system Grounding and Bonding Diagrams for Dwelling Services Figure 4-29. Service entrance grounding and bonding diagrams for typical overhead and underground dwelling services.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER Neutral bus bonded to enclosure N Neutral conductor *Equipment bonding jumper sized per NEC Grounding electrode conductor Cold water pipe and supplementary ground electrode system Metallic Conduits *As an alternative..ELECTRIC SERVICE INSTALLATION MANUAL . Neutral bonded to enclosure (main bonding jumper) N Hub Neutral conductor (dashed line) N N N N N 6'-0" max 5'-0" min. 91 Hawaiian Electric Co. Inc. Service entrance grounding and bonding.Neutral bonded to enclosure (main bonding jumper) N 6'-0" max 5'-0" min. • Hawaii Electric Light Co. Service entrance grounding and bonding. • Maui Electric Co. Size all grounding and bonding conductors in accordance with NEC. OTHER METERING UNDERGROUND OVERHEAD Neutral conductor (dashed line) N N N N N GENERAL METERING . multi-meter installation with non-metallic conduits. Ltd. multi-meter installation with metallic conduits. Figure 4-31. Inc.. 5'-6" preferred (typical) Main breaker (typical) Grounding electrode conductor Ground electrode system Size all grounding and bonding conductors in accordance with NEC.. Bonding jumper or screw to enclosure (typical) Figure 4-30. 5'-6" preferred (typical) Grounding electrode conductor Ground electrode system Bonding jumper or screw to enclosure (typical).. Do not bond neutral. . 5'-6" preferred Main disconnect switch required for seven or more breakers per NEC 230. Ltd. Inc. multi-meter installation with main breaker ahead.. • Maui Electric Co.71. Vertical Z mounting brackets (typical) Horizontal C mounting brackets (typical) 50' max. 11/4 min. Figure 4-33. Service entrance grounding and bonding.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER Main service disconnect Neutral conductor (typica l)6'-0" max N 5'-0" min.. Do not bond neutral. Inc. for seven or more meters. conduit Ground lug Test switch mounting bracket 6'-0" max 5'-0" min. 5'-6" preferred (typical) #8 bond wire minimum A separate lug shall be used unless listed for multiple conductors Instrument Finished 6" min. CT service with non-metallic conduits. Service entrance grounding and bonding. 92 Hawaiian Electric Co. 6'-0" max 5'-0" min. with metallic conduits. Service disconnect/breaker enclosure Load side Neutral conductor N 6'-0" max Equipment bonding jumper Grounding electrode conductor Ground per NEC requirements 1'-0" min. • Hawaii Electric Light Co. Hub N N N N N N N Neutral bonded to enclosure (main bonding jumper) Grounding electrode conductor Ground electrode system Remove bonding jumper or screw contacting enclosure (typical).. Figure 4-32. transformer cabinet ground Watthour meter installed by utility Neutral bus bonded to enclosure (main bonding jumper) Splice can/pullbox Ground electrode system Size all grounding and bonding conductors in accordance with NEC.ELECTRIC SERVICE INSTALLATION MANUAL . Size all grounding and bonding conductors in accordance with NEC. conduit 50' max. CT service and self-contained meter. Instrument transformer cabinet Splice can/pullbox N 6'-0" max Grounding electrode conductor Finished 6" min. Watthour meter installed by utility Ground lug #8 bond wire minimum Test switch mounting bracket 6'-0" max 5'-0" min.. Ltd.. Service entrance grounding and bonding. OTHER METERING Neutral conductor Grounding electrode conductor UNDERGROUND Notes: 1. As an alternate. Service entrance grounding and bonding. 2. As an alternate. transformer cabinet Ground electrode system Splice can/pullbox Neutral bus bonded to enclosure (main bonding jumper) Ground per NEC requirements Notes: 1. a continuous bonding jumper can be used to bond service equipment enclosures and conduits.Vertical Z mounting brackets (typical) Horizontal C mounting brackets (typical) Service disconnect/breaker enclosure Load side 11/4 min. 93 Hawaiian Electric Co. Finished Instrument ground 6" min. OVERHEAD Neutral bus bonded to enclosure (main bonding jumper) GENERAL METERING .. 5'-6" preferred (typical) N 6'-0" max Grounding electrode conductor 1'-0" min. Figure 4-35. a continuous bonding jumper can be used to bond service equipment enclosures and conduits. Watthour meters installed by utility Ground lug #8 bond wire minimum Test switch mounting bracket N 6'-0" max 5'-0" min. 2. • Hawaii Electric Light Co. Size all grounding and bonding conductors in accordance with NEC. 5'-6" preferred (typical) Neutral conductor 1'-0" min. Neutral bus bonded to enclosure (main bonding jumper) conduit 50' max. ground Ground per NEC requirements Ground electrode Figure 4-34. Inc. Size all grounding and bonding conductors in accordance with NEC. Inc. CT service with metallic conduits. with metallic conduits. • Maui Electric Co. Service disconnect/breaker enclosure Load side 11/4 min. ELECTRIC SERVICE INSTALLATION MANUAL - SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER Current transformer metering compartment sealable by the power company Neutral bus N Neutral conductor Concrete pad (4" min.) Line termination compartment (pull section) sealable by the power company Main breaker compartment Neutral bus bonded to ground bus Bonding jumper or screw grounding enclosure Equipment grounding bus Grounding electrode conductor Ground electrode system Notes: 1. Grounding electrode conductor connection to ground rod/ supplementary ground system shall be in non-sealable compartment. Do not install ground rod in-line termination compartment unless approved by the power company. 2. Size all grounding and bonding conductors in accordance with NEC. Figure 4-36. Service entrance grounding and bonding, metering switchboard with non-metallic conduits. 94 Hawaiian Electric Co., Inc. • Hawaii Electric Light Co., Inc. • Maui Electric Co., Ltd. CHAPTER Other Requirements 95 Hawaiian Electric Co., Inc. • Hawaii Electric Light Co., Inc. • Maui Electric Co., Ltd. OTHER METERING UNDERGROUND OVERHEAD 5 GENERAL OTHER REQUIREMENTS ELECTRIC SERVICE INSTALLATION MANUAL - SEVENTH EDITION 18" GENERAL OVERHEAD UNDERGROUND METERING OTHER Property line Electrical transformer lot 12" 12" 3'-6" 6'-0" Property line 3'-6" 12" 12" CATV Telephone Electric Sidewalk CATV Telephone Electric Curb Property line 12" 12" 3'-6" Street or roadway Top View Limit of electrical transformer Lot 3'-6" 12" 12" Finish grade at property line Side view of services at property line Telephone Electric CATV Telephone Electric Install utility boxes within the sidewalk area in accordance with city and county requirements. Figure 5-1. Separation of underground services at the property line. 96 Hawaiian Electric Co., Inc. • Hawaii Electric Light Co., Inc. • Maui Electric Co., Ltd. .Property line Electric conduits (centered at handhole) 3" Property line Electric 2'-6" CL CL CATV CL 1'-3" 7'-0" (required) Telephone CL CL Street or roadway Typical handhole grouping (not to scale) Curb Figure 5-2. Typical handhole grouping. the equipment must make an automatic-open transition return to the preferred service after an adjustable time period set by the utility. • Maui Electric Co. • Hawaii Electric Light Co. from zero to thirty seconds following interruption of the preferred service. However. Inc. The requirements for either of these optional methods of operation are: Automatic Transfer with Automatic Open Transition Return Transfer equipment must automatically transfer the customer’s load from a de-energized preferred service to an energized alternate service after an adjustable time period set by the utility. if during this time period the alternate service is interrupted. Equipment may be installed to automatically transfer the customer’s load from a deenergized preferred service to an energized alternate service. Ltd. or by manual closed transition return performed by power company workers. automatic close transition return. from one to ten minutes following restoration of preferred service. and to return to the preferred service either by automatic open transition return... When the preferred service is restored. Switching and Protection Service Connection Configurations Automatic Transfer Equipment – Commercial Service 0 to 600V METERING 97 Hawaiian Electric Co. the equipment may make an OTHER UNDERGROUND OVERHEAD GENERAL OTHER REQUIREMENTS . Inc. The customer must notify the utility’s load dispatcher as soon as practical whenever the equipment automatically transfers to the alternate service. followed by the instantaneous (no time delay) opening of the alternate service. However. if the preferred service is energized. This switch must be sealed with a lock as specified by the utility.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER automatic open transition return to the preferred service. and have suitable interlocks so the customer can not parallel both services but the utility can parallel both services when necessary to allow a manual closed transition transfer in either direction. if during this time period the alternate service is interrupted. and have suitable interlocks so that the customer can not parallel both services but the utility can parallel both services when necessary to allow a manual closed transition transfer in either direction.. The protective and controlling equipment in the preferred and alternate services must be designed to prevent paralleling the services during automatic transfer in either direction.. without waiting for the completion of the time delay period. The transfer equipment should have a Normal-Closed Transition selector switch as defined in this section. The transfer equipment should have a Normal-Closed Transition selector switch as defined in this section. from zero to thirty seconds following interruption of the preferred service. and elsewhere in this manual. When the preferred service is restored. Inc. the equipment must make an automatic close transition return to the preferred service after an adjustable time period set by the utility. . from one to ten minutes following restoration of preferred service. The utility will manually make a closed transition transfer of the customer’s load from the alternate service to the preferred service as soon as feasible after the preferred service is restored. the equipment may make an automatic open transition return to the preferred service if the preferred service is energized. the equipment may make an automatic open transition return to the preferred service.. Inc. as specified by the utility and elsewhere in this manual. However. from zero to thirty seconds following interruption of the preferred service. Automatic Transfer with Manual Closed Transition Return by the Power Company Transfer equipment must automatically transfer the customer’s load from a de-energized preferred service to an energized alternate service after an adjustable time period set by the utility. if the alternate service is interrupted. without waiting for the completion of the time delay period. • Hawaii Electric Light Co. Ltd. The automatic close transition return operation must include the closing of the preferred service. if the preferred service is energized. • Maui Electric Co.ELECTRIC SERVICE INSTALLATION MANUAL . The protective and controlling equipment in the preferred and alternate services must be 98 Hawaiian Electric Co. This switch must be sealed with a lock. Automatic Transfer with Automatic Close Transition Return Transfer equipment must automatically transfer the customer’s load from a de-energized preferred service to an energized alternate service after an adjustable time period set by the utility. • Maui Electric Co. • • • • • • • • Automatic Transfer Equipment – Commercial Service 2 kV to 15 kV OTHER 99 Hawaiian Electric Co. The customer must obtain permission from the utility’s load dispatcher before manually transferring to the alternate service. if this can not be determined by a visible air gap. so the preferred feeder can be changed by the utility.. The utility reserves the right to determine if automatic open or close transition return is applicable to the given installation. Ltd. The transfer equipment must have provisions for changing either service to be preferred. • Hawaii Electric Light Co. The transfer equipment should have a Normal-Closed Transition selector switch as defined in this section. automatic transfer equipment must comply with the following requirements: • • Install automatic transfer equipment in compliance with the applicable requirements in the manufacturer’s manual.interlocked to prevent paralleling the services during automatic transfer in either direction. The utility reserves the right to transfer the customer’s load to the alternate service. The customer must install bus fault protection to provide automatic transfer blocking of his facilities in the event of a bus fault. The customer must operate his equipment so it will not produce any adverse condition on the utility’s system in conformance with the utility’s tariffs.. Additional Requirements In addition to the requirements described above. Equipment may be installed to automatically transfer the customer’s load from a deenergized preferred service to an energized alternate service. either service. and have suitable interlocks so that the customer can not parallel both services but the power company can parallel both services when necessary to allow a manual closed transition transfer in either direction. and to block the automatic features temporarily to facilitate work or maintenance on the utility’s system. This switch must be sealed with a lock as specified by the utility. This requirement is in addition to the requirements as stated under the Disconnecting Equipment paragraph in this section: Protective and Controlling Equipment Commercial Service 2 kV to 15 kV. Inc. and to return to the METERING UNDERGROUND OVERHEAD GENERAL OTHER REQUIREMENTS . The transfer equipment must be accessible to power company workers at any time.. All operational testing must be performed by the customer and witnessed by the utility’s Test Division before the equipment is placed in service. The transfer equipment must have provisions for locking or blocking open. and must have targets to indicate whether each service is Open or Closed. Inc. and elsewhere in this manual. MECO (808) 871-7777. if the alternate service is interrupted. However. the equipment may make an automatic open transition return to the preferred service. after an adjustable time period set by the utility. The transfer equipment should have a Normal-Closed Transition selector switch as defined in this section and suitable interlocks so that the customer can not parallel both 100 Hawaiian Electric Co. The customer must notify the utility’s load dispatcher as soon as practical whenever the equipment automatically transfers to the alternate service. The manual closed transition return method may not be available at all locations on the utility’s system. The requirements for either of these optional methods of operation are: Automatic Transfer with Automatic Open Transition Return Transfer equipment must automatically transfer the customer’s load from a de-energized preferred service to an energized alternate service after an adjustable time period set by the utility. the equipment may make an automatic open transition return to the preferred service if the preferred service is energized. Automatic Transfer with Manual Closed Transition Return by the Power Company Transfer equipment must automatically transfer the customer’s load from a de-energized preferred service to an energized alternate service after an adjustable time period set by the utility. from one to ten minutes following restoration of preferred service. from zero to thirty seconds following interruption of the preferred service. The phone numbers to call are: HECO (808) 543-7466.. The transfer equipment should have a Normal-Closed Transition selector switch as defined in this section and suitable interlocks so that the customer can not parallel both services but the utility can parallel both services when necessary to allow a manual closed transition transfer in either direction. The protective and controlling equipment in the preferred and alternate services must be designed to prevent paralleling the services during automatic transfer in either direction. if during this time period the alternate service is interrupted. .ELECTRIC SERVICE INSTALLATION MANUAL . Inc. Inc. the equipment must make an automatic open transition return to the preferred service. and this option is offered subject to approval by the utility. HELCO (808) 969-6666. This switch must be sealed with a lock as specified by the utility and elsewhere in this manual. Automatic closed transition return is not allowed. Ltd. if the preferred service is energized. However.. from zero to thirty seconds following interruption of the preferred service.. • Maui Electric Co.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER preferred service either by automatic open transition return or by manual closed transition return performed by power company workers. without waiting for the completion of the time delay period. When the preferred service is restored. The utility will manually make a closed transition transfer of the customer’s load from the alternate service to the preferred service as soon as feasible after the preferred service is restored. The protective and controlling equipment in the preferred and alternate services must be interlocked to prevent paralleling the services during automatic transfer in either direction. • Hawaii Electric Light Co. Ltd. other facilities that regularly have large numbers of people present and/or total demand of 500 kVA or more. etc. large movie theaters. vital military installations. major shopping centers. • • Adequate vault space for the customer’s or utility’s primary automatic transfer equipment. or other commercial structure that is equipped with an elevator or electric stairway.. so that the preferred feeder can be changed by the utility. and is more than four stories high.. LORAN. common control program stations. communication facilities (television. • Maui Electric Co. Pay for the purchase and installation of primary automatic transfer equipment dedicated to serve their load. GENERAL OTHER REQUIREMENTS . Secondary customers that fit the critical load definitions are required to provide the following as a condition of service where necessary: • Adequate vault space for the utility’s primary automatic transfer equipment. stadiums. major police stations. civil defense. This requirement is in addition to the requirements as stated under the Disconnecting Equipment paragraph in this section: Protective and Controlling Equipment Commercial Service 2 kV to 15 kV. office building. Inc. hotel. and must have targets to indicate whether each service is Open or Closed if this can not be determined by a visible air gap. fire). UNDERGROUND 101 Hawaiian Electric Co. Automatic Transfer Policy for Critical Loads Customers may install their own automatic transfer equipment in place of utility’s primary automatic transfer equipment. OMEGA. refineries. heavy industry. airports. Any residential building. automatic transfer equipment must comply with the following: • The transfer equipment must have provisions for locking or blocking open. • Hawaii Electric Light Co.). large auditoriums. and/or total demand of 1000 kVA or more • Additional Requirements In addition to meeting the requirements of the above. police. vital navigational aids (VORTAC. • OTHER METERING OVERHEAD Primary customers with critical loads (see definition below) are required to provide the following as a condition of service where necessary. What is a critical load? Critical loads include: • Hospitals. This switch must be sealed with a lock as specified by the utility and elsewhere in this manual. either service. The transfer equipment must have provisions for changing either service to be preferred. vital gas utility pumping stations.services but the utility can parallel both services when necessary to allow a manual closed transition transfer in either direction. retirement home. Inc.. civil defense control centers. The customer must obtain permission from the utility’s load dispatcher before manually transferring to the alternate service. the customer must provide primary circuit breakers or equivalent between his equipment and the utility’s source. The equipment must have a current rating capable of safely interrupting and closing into the maximum primary fault current available as specified by the utility.. The customer must operate his equipment so that it will not produce any adverse condition on the power company’s system in conformance with the utility’s tariffs.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER • • The transfer equipment must be accessible to electric power company workers at all times. Ltd. except for auxiliary power or potential transformers which must be rated for operation at the nominal voltage as specified by the utility... The protective equipment must be equipped with phase(s) and ground relays.ELECTRIC SERVICE INSTALLATION MANUAL . • Maui Electric Co. • • • Protective and Controlling Equipment – Commercial Service 2 kV to 15 kV Services Which Can Not Be Fused By 100-Ampere Fuses Or Less For these services. There must be a visible air gap to give positive indication that service has been disconnected from the customer. • • 102 Hawaiian Electric Co. Inc. All equipment is to be rated for nominal 15 kV class operation with a minimum BIL of 95 kV. Provision must be made by the customer to safely disconnect and remove the protective and controlling equipment for maintenance without assistance from the utility. . The protective and controlling equipment must conform to the following requirements: • • • The protective and controlling equipment must be installed as close as feasible to the power company’s primary service termination. It is highly recommended that the customer install bus fault protection to provide automatic transfer blocking of his facilities in the event of a bus fault. The utility reserves the right to transfer the customer’s load to the alternate service and to block the automatic features temporarily to facilitate work or maintenance on the utility’s system. Inc. • Hawaii Electric Light Co. The total clearing time for opening the circuit to the customer’s equipment must not be slower than the time plotted on the curve as indicated in Figure 5-3. .4 .2 . Time-current curve for a fuse protecting 2 kV to 15 kV services.03 . The fuses must have a current rating capable of safely interrupting the maximum 103 Hawaiian Electric Co. Inc.4. Time-Current Characteristics The total clearing time at corresponding current values for opening the circuit to the customer’s equipment must not be slower than the maximum time plotted on the standard NEMA curve for 100 ampere Type N fuses. • Hawaii Electric Light Co.5 ..0 2.01 100 200 500 2000 1600 Current in Amperes 1000 5000 10000 Figure 5-3. Inc. Ltd..0 1.1 . • Maui Electric Co. OTHER Current and Voltage Rating METERING UNDERGROUND .05 .0 .02 .0 3. Services Which Can Be Fused By 100-Ampere Fuses Or Less Location The protective and controlling equipment must be installed as close as feasible to the utility’s primary service termination.04 OVERHEAD GENERAL OTHER REQUIREMENTS .3 TIime in Seconds . 104 Hawaiian Electric Co.. the utility will normally fuse the services to the customer with 100 ampere NEMA Type N fuses... Ltd. Stocking and Replacement Stocking and replacement of fuses must be the responsibility of the customer.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER primary fault current available as determined by the utility. Type of Fuses The fuses must be of a type designed for the specific application and location. . a 40 ampere fuse will be the largest size the customer can install that will coordinate with the utility’s fuse. This may require the utility to replace its fuses before the customer’s service can be restored. furnish. Two Services When fuses are installed in each of two services to the customer. any fault condition which causes the customer’s fuses to blow.ELECTRIC SERVICE INSTALLATION MANUAL . and install protective and controlling equipment as specified. and his load then increases and is no longer fusible by 100 ampere fuses. • Maui Electric Co. Inc. such as outdoor or indoor. Consequently. Future Growth When the customer chooses to install fuses initially. The fuses must be rated for operation at the nominal voltage as specified by the utility. it will be the customer’s responsibility to design. may also blow or damage the utility’s fuses. At many locations. • Hawaii Electric Light Co. when the customer installs fuses of a size from 40 to 100 amperes inclusive. Fused Service from Overhead Source When services fused by 100 ampere fuses or less are connected to the utility’s overhead lines. Inc. switching from one service to the other must be by open transition. Ltd... 3-Phase overhead line 3-Single conductor primary cables Primary cable termination Circuit breaker or equivalent with disconnecting means Disconnect switch. and in the closed-transition position bypasses the interlock to permit the utility to parallel the two services.Service Connection Configurations – Commercial Service 2 kV to 15 kV Definitions and Symbols Interlock Open Transition Closed Transition Normal-Closed Transition Switch NO NC As used here: An electrical or mechanical switch-blocking arrangement which prevents two services from being paralleled. Normally open Normally closed Table 5-1. A control switch which. Defintions for system protection and control circuits. Transferring customer’s load from one service to another by opening the first service before closing the second service. load break Fused disconnect switch or fuse removable with hotstick Transformer Table 5-2. non-load break Disconnect switch. Symbols. • Maui Electric Co. OTHER METERING UNDERGROUND OVERHEAD GENERAL OTHER REQUIREMENTS . Transferring a customer’s load by closing the second service before the first service is opened. Inc.. • Hawaii Electric Light Co. Power company Customer The division line between the customer and power company in general defines the portion of the installation for which the customer is responsible for ownership and maintenance. 105 Hawaiian Electric Co. Inc. in the normal position makes the interlock feature effective. Two metering points. at its expense. .SEVENTH EDITION Figure 5-4. Power company Customer M M 100 Amp max. The location of the primary metering point will normally be the first permanent support inside the customer’s property at which the utility terminates the source. Protective and controlling equipment for services which can not be fused by 100 ampere fuses or less. or if the customer will be metered on the secondary side of his transformer... Single Load Power company Customer M M M 100 Amp max.. Figure 5-5. METERING OTHER 106 Hawaiian Electric Co. Ltd. The instrument transformers will be mounted on this structure by the utility on facilities provided by the customer. Single Source. For overhead primary services. Further extensions of power company lines for service outside the customer’s property will be made in accordance with the utility’s tariff.ELECTRIC SERVICE INSTALLATION MANUAL . Protective and controlling equipment for services which can be fused by 100 ampere fuses or less. the metering will be located at a utility-approved location other than the first permanent support. When the customer’s first point of permanent support is not a feasible metering point. the utility will. Inc. M GENERAL OVERHEAD UNDERGROUND Overhead or Underground. • Hawaii Electric Light Co. provided such support is of a type and at a location approved by the utility. • Maui Electric Co. furnish and install a single span of service conductors from its pole or other aerial support to the customer’s first permanent support. Inc. Power company Power 100 Amp max. 107 Hawaiian Electric Co. • Hawaii Electric Light Co. UNDERGROUND Figure 5-7. Ltd. M M M M NO NO 100 Amp max. Dual Source.. Protective and controlling equipment for services which can be fused by 100 ampere fuses or less. Single Load Power company Customer Power company Customer MM MM NC NC Interlock Interlock NO NO MM MM Power company Customer Power company Customer MM MM NC NC 100 Amp Max. Inc.Overhead. Dual Source. Protective and controlling equipment for services which can not be fused by 100 ampere fuses or less. 100 Amp Max. Protective and controlling equipment for services which can be fused by 100 ampere fuses or less. METERING Figure 5-8. 100 Amp max. company NC 100 Amp max. Inc. OVERHEAD M NC NC NC Interlock Interlock M NO NO GENERAL OTHER REQUIREMENTS . 100 Amp Max.. 100 Amp max. MM NO NO MM Figure 5-9.. Protective and controlling M equipment for services which can not be fused by 100 ampere fuses or less. NC NC Customer Customer M Interlock NC Interlock NC 100 Amp NC max. Single Load Power company Power company Customer Customer M M M NC NC NC M M Figure 5-6. M M M Underground. OTHER The preferred fuse location is on the load side of disconnecting switches but it will be acceptable if fuses are installed on the source side of switches. Interlock Interlock 100 Amp Max. • Maui Electric Co. The tie breakers shown in Figure 5-10 must be as close as practical to the incoming main breakers. locate it as close as practical to the incoming main breakers. Parallel services. • Hawaii Electric Light Co. 108 Hawaiian Electric Co... to enable the utility to determine the demand load on each service. The customer must install a single-phase indicating maximum demand ammeter in one phase of each service. The customer may install indicating demand watthour meters in each service in lieu of the ammeters specified above. Any additional circuit breakers or switches must be installed or interlocked so that it will not be possible to parallel the power company's two continuously energized services. The customer must obtain the approval of the utility to use fuse protection instead of circuit breakers. Two metering points. Ltd. Dual Load Power company Customer M NC NO Primary voltage to customer's load M NC M Interlocked to prevent more than 2 breakers to be closed at any time. M GENERAL OVERHEAD UNDERGROUND METERING OTHER Underground. • Maui Electric Co. The ammeters must be installed on the load side of the utility’s revenue metering equipment.SEVENTH EDITION Figure 5-10.ELECTRIC SERVICE INSTALLATION MANUAL . The ammeters may be switchboard type similar to Lincoln Type AD-2. The ammeters must be single-range with a 5-ampere full-scale rating. . If provision is made for manual closed transition switching by power company personnel. Inc. Metering requirements for this type of service must be obtained from the utility. The tie breaker shown in Figure 5-10 will not be satisfactory for paralleling the two services unless the breaker trip elements can be blocked to prevent possible tripping on parallel current flow during a switching operation. or socket mounting type similar to Lincoln Type ADS manufactured by the Sangamo Electric Company.. Inc. Dual Source. An emergency or standby source may be utilized for times when normal service can not be provided. The switching equipment will be installed by the power company at the customer's expense on a concrete pad constructed by the customer on the customer's premises at a location and with accessibility as specified by the power company. A terminating pull-section must be provided by the customer in the area of his protective equipment. Ltd. • Hawaii Electric Light Co. Inc.Utility-Owned Switchgear (Non-Metering Equipment) Power company Customer M M Meter location for primary service M M Meter location for secondary service Customer's property line Switching equipment installed and operated by power company Protective equipment Figure 5-11. This applies to all permanent or portable emergency or standby sources designed to energize the customer’s electrical system. in accordance with the requirements of this manual. A minimum clear space extending 6 feet in front of the primary switching compartment is required. if requested by the power company. Customer Generators The utility allows parallel operation of customer generators on its electrical system. to revise the equipment to meet requirements as specified in Figure 5-9. with utility owned switchgear.. Service connection configuration. Notify the utility prior to installation of emergency or standby sources of electric service. The power company will maintain the switching equipment. • Maui Electric Co. in accordance with applicable rate schedules.. This option is available only to customers having a maximum demand up to 1000 kVA. METERING 109 Hawaiian Electric Co. The equipment will be locked with a power company lock and switching will be performed by the power company personnel only. Metering must be on the secondary side of the transformer. the customer shall be required. If this option is taken and the demand exceeds 1000 kVA. The distance from the switching equipment to the customer's protective equipment shall not exceed 75 feet. For installations for which the advantages of a primary rate are desired but the nature of load does not warrant the cost of customer-owned switchgear. Inc.. the customer may opt for utility-owned switchgear. only with specific agreement with the customer. OTHER UNDERGROUND OVERHEAD GENERAL OTHER REQUIREMENTS . No protective equipment will be provided or permitted to be installed within the switching equipment. and metering functions.. 60 Hertz. as soon as possible. and installed so the customer’s emergency power source does not feed back into the utility’s distribution system. UL-listed double-throw switch or transfer device is required. the customer must apply to the utility for permission. Inc. The plans must include service equipment location..SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER General requirements for customer generators include: • A positive acting. Upon receiving appropriate approvals. and one-line diagrams. When the customer plans to operate generators in parallel with the utility's system. The switch and its configuration must be approved by the utility prior to purchase. constructed. The switch or transfer device is necessary for opening all ungrounded conductors from the utility’s normal supply prior to the transfer to the emergency power source. Conductors intended for the emergency or standby power source must not be installed in the same conduits or raceways as the utility’s service entrance conductors. place a sign at the service entrance equipment indicating the type and location of the on-site emergency standby power source. Electrical connections must not be made to the service entrance conductors or other equipment until the utility has approved the plans. • • • • • Design and Operating Guidelines This section covers general service and metering requirements which apply to generating systems of 500 kW or less. The customer provides the utility with a construction and installation schedule. Emergency generators must not be installed in locations where metering facilities are subject to noise levels in excess of 85 db. submit the building plans to the utility for review.. The double-throw switch or transfer device must be designed. Consult with the power company for other generating systems. . • Maui Electric Co. protection. Refer to the meter section of this manual for acceptable meter locations. and to discuss the detailed requirements that apply to parallel operations. The specific functions actually implemented will be determined by the utility. Ltd. • Hawaii Electric Light Co. Typical functions include: • • • Synchronizing controls Voltage and frequency controls Over-voltage trip 110 Hawaiian Electric Co. As prescribed by the National Electrical Code. "Typical" is interpreted as possible functions. the customer submits single-line diagrams showing the control. Typical functions to be included are listed below. and operating at less than 600 volts. As part of this procedure. service elevations.ELECTRIC SERVICE INSTALLATION MANUAL . Inc. Residential Customer Emergency Generators Be extremely cautious when using a portable generator during a power outage. Figure 5-12.. and to power company workers. This is very dangerous to occupants. it can reach in excess of 12. neighbors. or at any other time. Once backfeed reaches primary lines. Inc. 111 Hawaiian Electric Co.000 volts.. Never plug a portable generator into a home’s electrical system and attempt to backfeed power into the home’s electrical panel. OTHER METERING UNDERGROUND Power company Customer OVERHEAD GENERAL OTHER REQUIREMENTS .• • • • • • • • • • Under-voltage trip Current unbalance detection and trip Over-current trip Interlocking of main breaker Ground current detection Over-frequency trip Under-frequency trip Energy measurement Demand measurement VARh measurement (when Schedule P applies) Common bus Utility system Revenue meters Main breaker Local breaker Customer generation Customer load Consult with power company for requirements in this area. Inc. Electricity can back-feed not only into your own panel. but also out into the company’s power system. • Hawaii Electric Light Co. • Maui Electric Co. Functional diagram of a customer generation installation. Ltd.. and their supporting fixtures (including rods. if the utility re-energizes power while your generator is connected to the system. as shown in the Metering chapter of this manual. you can destroy your generator.. braces and guys) must not be less than 1 foot above. Opening the home’s main breaker does not adequately protect against these risks.. and fuses between the luminaries and the utility’s overhead secondary lines or service drop. . For street lighting systems in new subdivisions and roadway extensions. • Maui Electric Co. Furthermore. 6’ maximum.. Street Lighting Street Lighting From an Overhead Electrical Source The customer installs and maintains conductors. Inc. The only safe way to use a portable generator is to plug individual appliances directly into the generator. or 2 feet below the level of messenger or conductors supported by messengers. the customer must submit a set of drawings of his street lighting plans to the utility. fuse holders. Inc. If your generator tries to feed into this ground. This is how it was designed to be used. street lamps.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER In addition to this safety hazard. All parts of street light service drop. separable connectors. If you have special needs for backup power during outages. Power company crews routinely use ground clamps for their safety.ELECTRIC SERVICE INSTALLATION MANUAL . consult a licensed electrician to discuss your options. Height requirements for pole-mounted street light meter sockets are: 5’ minimum. • Hawaii Electric Light Co. 112 Hawaiian Electric Co. the amperage drawn on your generator will greatly exceed its design limits. conduits. the sudden reversal of power flow can destroy your generator. Ltd. with preferred mounting height of 5’-6" similar to outdoor meters accessible to pedestrian traffic. Inc. 113 Hawaiian Electric Co. Inc.2. • Hawaii Electric Light Co.. Ltd. Centerline of bracket CL Figure 5-13.. Street lighting from an overhead electrical source..3.Vertical plane Primary 0'-9" 6'-0" Secondary conductor level 2'-0" 2'-0" Horizontal Centerline of luminaire 2'-6" or 3'-3" nominal Required clear space per GO 6 rule 58.B. OTHER METERING UNDERGROUND OVERHEAD Vertical clearance less than 2'-0" allowed outside 2' x 2' clear space GENERAL OTHER REQUIREMENTS . • Maui Electric Co.A. the utility will select a splicing point which will provide a passage to the right or left of luminaries to provide a 12" clearance. I. Coil the wire at the pole. RHW. 8 AWG stranded aluminum wire on line side and No. 12" minimum clearance between the light fixture and the utility service conductor. Luminaries and bracket. B Customer's luminaire on pole requiring a service drop. assembly furnished and installed by customer. 12 AWG RHW black. Figure 5-14. Ltd. • Maui Electric Co.. insulated separable connector. Wood pole by customer. 8 AWG 7-strand aluminum wire. No. • Hawaii Electric Light Co. Aluminum service drop anchor bolt. No. Inc. G. suitable for No. 12 AWG RHW white.SEVENTH EDITION GENERAL OVERHEAD UNDERGROUND METERING OTHER 18" E B 18" Secondary lines A A C 6" 2" D F G K J H L A C D E F G I A Customer's luminaire on wood pole supporting power company's secondary aerial cable. pending splicing by utility. No. 12 AWG copper on load side. D. C. single conductor stranded wire F. . K. B. In the line unfused.. If not possible when service drop passes over luminaries. No. In the line fuse holder and fuse suitable for No. 114 Hawaiian Electric Co. of sufficient length to splice to the power company’s lines. single conductor stranded wire. E. Aluminum service drop by customer.ELECTRIC SERVICE INSTALLATION MANUAL . 3/4" PVC Schedule 80 conduit. details. H. L. Inc. J. Preformed grip by customer. 12 copper wire on load side. 8 AWG stranded aluminum wire on line side. A. Street lighting from an overhead electrical source.. Street Lighting From an Underground Electrical Source Underground street light requirements for Maui Electric Company Ltd. (MECO) will be addressed according to the company’s standards. Please contact MECO’s engineering department at (808) 871-2390 for assistance. Inc. • Maui Electric Co.. 115 Hawaiian Electric Co. Ltd.. Inc. • Hawaii Electric Light Co.. OTHER METERING UNDERGROUND OVERHEAD GENERAL OTHER REQUIREMENTS . . . . OTHER METERING UNDERGROUND OVERHEAD GENERAL OTHER REQUIREMENTS .. • Maui Electric Co. Inc. Ltd... • Hawaii Electric Light Co.119 Hawaiian Electric Co. Inc.
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