Mike Holt’s 2008 NEC IndexIntroduction This index is a free resource from Mike Holt Enterprises, Inc. It was designed to help you find what you’re looking for in the Code book in seconds! This index lists all those difficult key words and gives you the section where these words appear in the code. It’s a great tool to get you familiar with those hard to find references in the NEC! Use this index along with your Code Book and Tabs and you’ll be in great shape! About the Author Mike Holt worked his way up through the electrical trade from an apprentice electrician to become one of the most recognized experts in the world as it relates to electrical power installation. He was a Journeyman Electrician, Master Electrician, and Electrical Contractor. Mike came from the real world, and his dedication to electrical training is the result of his own struggles as an electrician looking for a program that would help him succeed in this challenging industry. It is for reasons like this that Mike continues to help the industry by providing free resources such as this index. It is the goal of Mike Holt and everyone on the Mike Holt Team to do everything in our power to aid in your pursuit of excellence. For more great FREE resources from Mike Holt visit www.MikeHolt.com Code Book Need to order a Code book? The spiral edition makes the code book much easier to use. The spiral coil allows you to conveniently study by placing the book folded on your desk. It lays flat and you can even put it on a hook in your truck. The most widely adopted element of a building code in the United States and the world, the NEC® is the benchmark for safe and efficient electrical installations. Whether your jurisdiction adopts the 2008 Code immediately or down the road, you need to extend your knowledge and take advantage of the benefits right away, not months or years behind your peers in the electrical industry. NFPA product. For more information, visit www.MikeHolt.com. Tabs These peel and stick tabs are a great way to customize your 2008 Code book. Included with the tabs is a 16” x 20” Raceway Poster and an Ohms Wheel Sticker. For more information, visit www.MikeHolt.com. Mike Holt Enterprises, Inc. • www.MikeHolt.com • 1.888.NEC.CODE i important terms and concepts. Be sure you understand that Article 100 defines the terms that apply to two or more articles. how can you apply the Code requirements for it? In addition. Grammar. which you can do by reading this textbook. This means that the definitions of those terms are only applicable for that given article. this is equivalent to completing a course on the basics of electrical theory. Section 250.” can dramatically change the requirement of a rule. Although they may understand this. and other qualified persons.1(C)]. The word “or” can imply alternate choices for equipment wiring methods. Grounding and Bonding.The National Electrical Code The National Electrical Code (NEC) is written for persons who understand electrical terms. If you don’t understand a term used in a Code rule. You have the foundation upon which to build. generators. and ii Mike Holt’s 2008 NEC Index . For example. arc blast. designers. There are thousands of specific and unique applications of electrical installations. In the electrical world. Unfortunately. and Punctuation It’s not only the technical words that require close attention. because even the simplest of words can make a big difference to the intent of a rule. The Code was not written to serve as an instructive or teaching manual for untrained individuals [90. electrical engineers. you’re ready to start playing the game. because you really do not understand how all the information works together. Let’s not forget about grammar and punctuation. Slang Terms or Technical Jargon Electricians. or equipment. it’s a great game if you enjoy mental warfare. To safely apply the NEC. engineers. the Code doesn’t cover every one of them. For example. many articles have terms unique for that specific article. For example. and other trade-related professionals use slang terms or technical jargon that isn’t shared by all. while “and” can mean an additional requirement. switch. NEC Terms and Concepts The NEC contains many technical terms. luminaire. safety procedures. To play chess well. You must first learn the names of the game pieces. back to the electrical world. and how each piece moves. at this point all you can do is make crude moves. be sure you use the proper word. motors. Not a Game Electrical work isn’t a game. The location of a comma “. arc fault. theory. not everyone does. but now you need to take it to the next level. and it must be taken very seriously. so it’s crucial for Code users to understand their meanings and their applications. you will need to learn how to use your knowledge by working on subtle strategies before you can work your way up to the more intriguing and complicated moves. Again. D and electric shock • irect current D • eries and parallel circuits S • lectrical formulas E • lternating current A • nduction. If you don’t know what a dwelling unit is. and don’t use a word if you don’t understand its definition and application. lots of electricians use the term “pigtail” when describing the short conductor for the connection of a receptacle. you must understand the purpose of a rule and how it affects the safety aspects of the installation. as well as the basic layout of the NEC gives you just enough knowledge to be dangerous. such as: • hat electricity is and how is it produced W • angers of electrical potential: fire. These individuals include electricians.2 contains the definitions of terms that only apply to Article 250. So where possible. how the pieces are placed on the board. electrical inspectors. Learning the basics of electricity. the term “Dwelling Unit” applies to many articles. Learning to use the NEC is somewhat like learning to play the game of chess. it will be impossible to properly apply the NEC requirement. This makes it very difficult to communicate because not everybody understands the intent or application of those slang terms. and transformers I Once you understand the fundamentals of the game of chess. electrical contractors. this is equivalent to completing a comprehensive course on basic electrical theory. and electrical trade practices. Small Words. and Tables (Chapter 9). Fine Print Notes (explanatory material) 9. Chapters. 1.26(A)(1). and information about formatting units of measurement.” etc. 3.8(A)(1) is located in Chapter 2. 6. or Less. they say “Article 210. Section 8. Articles.” Tables. • www. (b).The National Electrical Code NEC Style and Layout Before we get into the details of the NEC. each of which covers a specific subject. which is located in Part II—600 Volts. the introduction to the Code.8. For example. Numbers in parentheses (1). we need to take a few moments to understand its style and layout. Introduction. and Power-Limited Circuits Article 800 Communications Systems 5. The Table of Contents displays the layout of the Chapters. Articles. we have a tendency to forget what “Part” the NEC rule is relating to. Communications Systems (Chapter 8). etc. Article 90 (Introduction to the Code) 3. subsection (A). Nominal.632. examination of equipment for safety. and lowercase letters (a). If you think about it.. Exceptions (Code permissions) 8.8(A)(1). wiring planning. or less are contained in Table 110. and Similar Installations Article 725 Remote-Control. Table of Contents. Many Code requirements are contained within tables. (B). Sections and Tables (Code requirements) 7. what is covered and what is not covered along with how the Code is arranged. When attempting to locate the rules for a particular situation.MikeHolt.34(A) contains the working space clearances for electrical equipment. Table 110. It contains the purpose of the NEC. knowledgeable Code users often go first to the Table of Contents to quickly find the specific NEC part that applies.8. Annexes (information) 10. Sections and Tables. Inc. Larger articles are subdivided into parts. may further break down a subsection. Articles 90 through 830 (individual subjects) 5. Index 1. further break the rule down to the third level. Nominal installations. the rule requiring all receptacles in a dwelling unit bathroom to be GFCI protected is contained in Section 210. Satellite. The rules for working clearances for electrical equipment for systems 600V. Signaling.” when they should say “Section 210. and Parts as well as the page numbers. nominal. The NEC begins with Article 90. Author’s Comment: Because the parts of a Code article aren’t included in the section numbers. The articles fall into one of four groupings: General Requirements (Chapters 1 through 4). (2). Chapters 1 through 9 (major categories) 4. Each NEC rule is called a Code section. It’s an excellent resource and should be referred to periodically to observe the interrelationship of the various NEC components. Fountains. each of which is divided into articles. A Code section may be broken down into subsections by letters in parentheses “(A).888.NEC.34(A) is located in Part III. Parts. Parts (divisions of an article) 6. etc. Understanding the structure and writing style of the Code is very important before it can be used effectively. It also gives information on enforcement and how mandatory and permissive rules are written as well as how explanatory material is included. Data. For example. Sections. we might think this table applies to all electrical installations. For example: • • • • • • • • Article 110 General Requirements Article 250 Grounding and Bonding Article 300 Wiring Methods Article 430 Motors and Motor Controllers Article 500 Hazardous (Classified) Locations Article 680 Swimming Pools. Table of Contents 2. There are nine chapters. If we aren’t careful.888.CODE (1. 2. Many in the industry incorrectly use the term “Article” when referring to a Code section. you must read them carefully in order to understand Mike Holt Enterprises. The titles of the tables are extremely important. For example.2633) iii . Article 210. but Table 110. Specific Requirements (Chapters 5 through 7). The NEC contains approximately 140 articles.com • 1. and Cable TV) Chapter 9 Tables–Conductor and Raceway Specifications 4.. how can you use something if you don’t know how it works? The National Electrical Code is organized into ten components. which contains the requirements for Over 600 Volts. Article 90 also includes information on formal interpretations. Section 210. which are lists of NEC requirements placed in a systematic arrangement. • • • • • • • Chapter 1 General Chapter 2 Wiring and Protection Chapter 3 Wiring Methods and Materials Chapter 4 Equipment for General Use Chapter 5 Special Occupancies Chapter 6 Special Equipment Chapter 7 Special Conditions • • Chapter 8 Communications Systems (Telephone. sub-subsection (1). On the other hand. With this knowledge. you’ll need to use the Table of Contents to find the page number. terms. Fine Print Note (FPN). limitations.” then “services. If you try “disconnecting means. Many times notes are provided in or below a table. Exceptions. Code experts typically know the requirements so well they just go to the correct rule without any outside assistance. Annexes. applications. As you gain experience in using the Code and deepen your understanding of words. Note 1 for Table 300. and practices. Customizing Your Code Book One way to increase your comfort level with the Code is to customize it to meet your needs.MikeHolt. Index. If you use the Index. Index.5 explains how to measure the cover when burying cables and raceways. The phrase “shall not” means it isn’t permitted. and tables. or by calling 1. 8. you’re required to do it in a particular way. and Note 5 explains what to do if solid rock is encountered.5(C)]. it’s divided up into multiple parts (actually eight parts). on your experience with the NEC. A bullet symbol “•” is located on the margin to indicate the location of a rule that was deleted from a previous edition. Table of Contents. permitted for a service? If you’re an experienced Code user. to some degree.. Mandatory Exception. are identified by shading. A permissive exception uses words such as “shall be permitted. Exceptions are Code requirements or allowances that provide an alternative method to a specific requirement. However. By placing tabs on Code articles. For example.” which means it’s acceptable (but not mandatory) to do it in this way. or flip through the Code to Article 230. be sure to read them as well since they are also part of the requirement. and are included in the Code for informational purposes only. Many people complain that the NEC only confuses them by taking them in circles. but rules that have been relocated aren’t identified as a change. you’ll know Article 230 applies to “Services. Because the NEC doesn’t give a page number in the Index. The Index at the back of the NEC is helpful in locating a specific rule. Annexes aren’t a part of the NEC requirements. to look up the term “service disconnect. then continue to flip through pages until you find Part VI. Author’s Comment: Changes to the NEC since the previous edition(s). you can quickly go to the Table of Contents and see that it lists Service Equipment Disconnecting Means requirements in Part VI. Permissive Exception. A small six-inch ruler also comes in handy for locating specific information in the many Code tables.The National Electrical Code the contents.NEC. Underline or circle key words and phrases in the NEC with a red pen (not a lead pencil) and use a six-inch ruler to keep lines straight and neat. be sure you highlight those requirements in the Code that are the most important or relevant to you. There are two types of exceptions—mandatory and permissive. but it isn’t a Code requirement [90. 7.” you’ll find the Index specifies the rule is located in Article 230. those exceptions with mandatory requirements are listed before the permissive exceptions. A mandatory exception uses the words “shall” or “shall not. Author’s Comment: The number 70 precedes all page numbers because the NEC is NFPA standard number 70. As you read through this textbook. 10. you will find the NEC much easier to understand and use than you originally thought. You can do this by highlighting and underlining important NEC requirements. and that includes the Table of Contents and the Index. Let’s work out a simple example: What NEC rule specifies the maximum number of disconnects iv Mike Holt’s 2008 NEC Index . sections.” and because this article is so large. of each table in the Code. principles. This is a very handy way to make important requirements stand out. Tabbing the NEC. Underlining. it will make it easier for you to use the NEC. etc. How to Locate a Specific Requirement How to go about finding what you’re looking for in the Code depends. which lists subjects in alphabetical order. Be sure to highlight terms in the Index and Table of Contents as you use them. Use yellow for general interest and orange for important requirements you want to find quickly.com. When a rule has several exceptions.888. 9. too many tabs will defeat the purpose.” you’ll see there’s no listing. You can order a custom set of Code tabs online at www. Part VI. and by attaching tabs to important pages. average Code users should use all of the tools at their disposal. A fine print note contains explanatory material intended to clarify a rule or give assistance.CODE. The Table of Contents might be the only thing very experienced NEC users need to locate the requirement they’re looking for.” The word “shall” in an exception means that if you’re using the exception. Highlighting. 3 314.13 422.17 320.23 640.33 422.10 547.10 640.2 518.CODE (1. and Reproduction Equipment Audio Systems Near Bodies of Water Definitions Grounding and Bonding Locations and Other Articles Loudspeakers in Fire-Resistance-Rated Partitions.17 314.2633) 1 .21 314.2 640.100 320. Inc.65 440.40 320.63 440.5 314.32 440.4 440.15 422.21 640.1 518. Walls.com • 1.14 440.16 314.1 547.62 440.12 422.10 518.22 422. and Ceilings Mechanical Execution of Work Number of Conductors in a Raceway Protection of Electrical Equipment Scope Use of Flexible Cords and Flexible Cables Wiring Methods Wiring of Equipment Racks 320.30 314.2008 NEC Index Description Section Description Section A Agricultural Buildings Definitions Equipotential Planes and Bonding of Equipotential Planes Luminaires Scope Wiring Methods Air-Conditioning and Refrigeration Equipment General Ampacity and Rating Conductor Size for Several Motor-Compressors Conductor Size for Single Motor-Compressors Disconnect Location Short-Circuit and Ground-Fault Overcurrent Device Size Room Units Branch-Circuit Requirements Disconnecting Means.28 314.108 320.888.2 547.24 320.31 422.25 314.16 422.15 314.22 440. Amplification.34 422.64 640. Leakage Current Detector-Interrupter and Arc-Fault Circuit Interrupter Supply Cords Appliances Disconnect Cord-and-Plug-Connected Appliance Disconnects Permanently Connected Appliance Disconnects Unit Switches as Disconnects General Branch-Circuit Rating Central Heating Equipment (Furnaces) Central Vacuums Cord-and-Plug-Connected Vending Machines Electric Drinking Fountains Flexible Cords Overcurrent Protection Storage Water Heaters Support of Ceiling Paddle Fans Armored Cable Bends Boxes and Fittings Conductor Ampacities Construction Equipment Grounding Conductor Exposed Work 547.7 640.9 640.4 314.8 547.3 518.1 640.6 440.15 B Boxes Boxes and Conduit Bodies for Conductors 4 AWG and Larger Boxes Recessed in Walls or Ceilings Conductors That Enter Boxes or Conduit Bodies Covers and Canopies Damp or Wet Locations Handhole Enclosures Metal Boxes Nonmetallic Boxes Number of 6 AWG and Smaller Conductors in Boxes and Conduit Bodies Outlet Box Repairing Gaps Around Boxes Short-Radius Conduit Bodies Support of Boxes and Conduit Bodies 314.4 640.33 440.51 422.23 320.5 In Accessible Attics or Roof Spaces Securing and Supporting Through or Parallel to Framing Members Uses Not Permitted Uses Permitted Assembly OccupancIes General Classifications Other Articles Scope Wiring Methods Audio Signal Processing.23 Mike Holt Enterprises.52 422.18 320.80 320.20 314.11 422.25 640.12 320.27 314.3 640.6 640.632.10 422.30 320.NEC. • www.MikeHolt.888. 30 225. and Storage Classification of Hazardous Areas Definitions GFCI-Protected Receptacles Scope Seals Special Equipment Section 220.1 511.12 210.21 210.44 220.84 220.42 220.37 225.35 225.4 392.9 511.29 210.61 240.54 220.8 210.11 525.25 210.1 525.2 511.3 525.3 511.4 210.31 525.31 225.56 220.3 210. and Similar Events Definitions Equipment Bonding Equipment Grounding Equipment Grounding Conductor Continuity Assurance GFCI-Protected Receptacles and Equipment Multiple Sources of Supply Other Articles Outdoor Portable Distribution or Termination Boxes Overhead Conductor Clearances Protection of Electrical Equipment Rides.6 525. Tents.2 312.10 C Cabinets.3 312.60 220.Index Description Surface Extensions Wiring to be Accessible Branch Circuits Arc-Fault Circuit-Interrupter—Protected Circuits Branch Circuits Required Branch-Circuit Rating Branch-Circuit Requirements for Devices Buildings with Multiple Occupancies Conductor Sizing GFCI Protection Guest Rooms and Guest Suites Identification for Branch Circuits Multiwire Branch Circuits Outlet Device Rating Overcurrent Protection Permissible Loads Building Supplied by Feeder Access to Occupants Disconnect Construction Disconnect Location Disconnecting Means Grouping of Disconnects Identification of Multiple Feeders Identified as Suitable for Service Equipment Maximum Number of Disconnects Number of Supplies Rating of Disconnecting Means Section 314. Repair.10 525.87 220.11 392.33 225.14 2 Mike Holt’s 2008 NEC Index .8 392.53 220.43 220.2 525.7 392.6 392.55 220. and Meter Enclosure Damp or Wet Locations Enclosures Installed in Walls Repairing Gaps Used for Raceway and Splices Cable Trays Cable Installation Conductor Ampacity of Multiconductor Cables in Cable Trays Equipment Grounding Conductor Installation Number of Multiconductor Cables in Cable Trays Uses Not Permitted Uses Permitted Calculations Branch-Circuit Load General Lighting Maximum Load on a Branch Circuit Other Loads—All Occupancies 312.21 525.23 225.18 210.38 225.39 Description Feeder and Service Load Commercial—Kitchen Equipment Load Commercial—Show Window and Track Lighting Load Dwelling Unit—Appliance Load Dwelling Unit—Electric Clothes Dryer Load Dwelling Unit—Electric Ranges and Cooking Appliances Dwelling Unit—Small-Appliance and Laundry Load Feeder/Service Neutral Unbalanced Load Fixed Electric Space-Heating Load General Lighting Demand Factors Motor Load Noncoincident Loads Receptacle Load Optional Method Determining Existing Loads Dwelling Unit—Optional Load Calculation Multifamily—Optional Load Calculation Optional Calculation—Two Dwelling Units Carnivals.23 525.50 220.5 312. Circuses.22 314. and Concessions Scope Services Wiring Methods Cartridge Fuse Circuit Breakers Applications Indicating Markings Method of Operation Commercial Garages.80 511.82 220.18 220. Fairs.12 220.85 525. Cutout Boxes.34 225.9 392.22 525.81 240.5 525.52 220.20 210.5 210.36 225.32 525.12 511.4 312.61 220.85 240.8 392.30 525.20 240.32 225.11 210.3 220.51 220.7 210.19 210.83 240. 42 358.113 820.13 310.182 820.3 820. Inc.20 358.154 800.632.100 820.44 800.2 800.21 800.110 820.NEC.26 820.113 800.5 310.28 358. • www.888.133 820.3 800.24 362.179 820.1 820.CODE (1.182 800.com • 1.10 310.48 Description Cable Grounding Definitions Grounding or Interruption of Metallic Members of Coaxial CATV Cables Installation of Coaxial Cables and Equipment Listing of Coaxial Cables Listing Requirements for Coaxial Cables Listing Requirements for Coaxial Raceways Locations and Other Articles Mechanical Execution of Work Overhead Coaxial Cables Power Limitations Raceways for Coaxial Cables Scope Spread of Fire or Products of Combustion Underground Circuits Entering Buildings Unlisted Cables and Raceways Entering Buildings Conductors Conductor Ampacity Conductor Construction Conductor Identification Conductors Conductors in Parallel Corrosive Conditions Insulation Temperature Limitation Location Minimum Size Conductors Stranded Conductors Section 820.24 800.30 358.12 310.MikeHolt.Index Description Wiring and Equipment Above Hazardous Locations Wiring and Equipment in Hazardous Locations Communications Circuits Abandoned Cable Access to Electrical Equipment Behind Panels Designed to Allow Access Applications of Communications Cables Cable Grounding Definitions Dwelling Unit Communications Outlet Installation of Communications Cables Installation of Equipment Lightning Conductors Listing of Communications Cables Listing Requirements for Communications Cables Listing Requirements for Communications Raceways Mechanical Execution of Work Other Articles Overhead Communications Cables Primary Protection Raceways for Communications Circuits Scope Spread of Fire or Products of Combustion Unlisted Cables Entering Buildings Community Antenna Television (CATV) and Radio Distribution Systems Abandoned Cable Access to Electrical Equipment Behind Panels Designed to Allow Access Applications of Coaxial Cables and Raceways Section 511.1 800.133 800.2633) 3 .9 310.26 800.4 310.2 820.7 511.6 358.3 820.8 310.48 310.15 310.15 820.25 800.44 820.48 Mike Holt Enterprises.25 820.24 358.156 800.26 358.53 800.110 800.46 362.10 362.21 820.22 358.4 800.179 800.47 820.12 358.93 820.90 800.24 820.2 310.60 362.888.154 D Definitions 100 E Electrical Metallic Tubing Bends Couplings and Connectors Listing Requirement Number of Bends (360°) Number of Conductors Reaming and Threading Securing and Supporting Trade Size Uses Not Permitted Uses Permitted Electrical Nonmetallic Tubing Bends Bushings Equipment Grounding Conductor Joints 358.100 800.18 800. 11 402.3 402.9 600.130 424.1 620.22 362.6 700.118 Description Section F Feeders Equipment Grounding Conductor Ground-Fault Protection of Equipment Identification for Feeders Minimum Rating Overcurrent Protection Fire Alarm Systems Abandoned Cable Access to Electrical Equipment Behind Panels Designed to Allow Access Applications of Power-Limited Fire Alarm Cables (PLFA) Definitions Equipment Marking Fire Alarm Circuit Cables Extending Beyond a Building Fire Alarm Circuit Identification Fire Alarm Circuit Requirements Listing and Marking Requirements of Power-Limited Fire Alarm Cables (PLFA) Mechanical Execution of Work Other Articles Power Sources for Power-Limited Fire Alarm Circuits Power-Limited Fire Alarm Circuits.3 760.51 620.16 700.35 760.8 402.12 215.21 760.26 700.154 760.6 600. Transformers.Index Description Number of Bends (360°) Number of Conductors Securing and Supporting Trade Sizes Trimming Uses Not Permitted Uses Permitted Electric Signs and Outline Lighting Ballasts.1 760.10 400.10 600.2 600.4 600.14 4 Mike Holt’s 2008 NEC Index . Fixture Wires Allowable Ampacity of Fixture Wires Minimum Size Neutral Conductor Overcurrent Protection Raceway Size Types Uses Not Permitted Uses Permitted Flexible Cords and Flexible Cables Ampacity of Flexible Cords and Flexible Cables Equipment Grounding Conductor Identification Neutral Conductor Identification Overcurrent Protection Protection from Damage 215.24 760.6 215.23 400.32 240.1 620.3 700.124 760.85 620.179 760. and Comunications Circuits Scope Separation from Power Conductors Support Wiring Methods on Load Side of Power-Limited Fire Alarm Power Source Fixed Electric Space-Heating Equipment Branch Circuits Disconnect for Electric Duct Heater Controllers Disconnecting Means.139 760.33 250.9 240.7 600.10 215.5 600. Class 3. and Moving Walks Branch Circuit for Hoistway Pit Branch Circuit for Machine Room/Machinery Space Disconnecting Means GFCI-Protected Receptacles Scope Wiring in Elevator Hoistways and Machine Rooms Emergency Standby Power Systems Application of Other Articles Capacity Coordination Emergency Illumination Equipment Approval Ground-Fault Protection of Equipment Loads on Emergency Branch Circuits Scope Signs Tests and Maintenance Transfer Equipment Wiring Enclosure Damp or Wet Locations Vertical Position Equipment Grounding Conductor Equipment Bonding Jumpers Identification of Equipment Grounding Conductors Sizing Equipment Grounding Conductor Types of Equipment Grounding Conductors Section 362.15 700.27 700.30 362.21 600. and Electronic Power Supplies Branch Circuits Definitions Disconnects Grounding and Bonding Listing Location Markings Portable or Mobile Signs Scope Elevators.65 424.20 362.28 362.12 402.136 760.30 760.24 620.3 424.13 400.5 700.5 402.6 402. Class 2.23 620.25 760.102 250.122 250.22 400.2 760.2 215.121 760.10 600.37 700. Escalators.7 402.32 760.8 700.19 402.3 600.4 700.12 362.143 760.5 400.26 362.119 250.2 700.1 700.3 760. 8 90.13 90.26 348.10 250.3 110.22 110.7 348.CODE (1.4 110.2 90.7 250.9 90.6 348.10 110.1 90.53 680.NEC.632.5 110.6 110.34 250.7 110.104 250.11 110.5 110.14 110.146 250.24 348.28 348.2633) 5 .50 680.4 400.58 680.6 110. • www.Index Description Pull at Joints and Terminals Suitability Types of Flexible Cords and Flexible Cables Uses Not Permitted Uses Permitted Flexible Metal Conduit Bends Fittings Grounding and Bonding Listing Requirements Number of Bends (360°) Number of Conductors Securing and Supporting Trade Size Trimming Uses Not Permitted Uses Permitted Fountains Bonding Cord-and-Plug-Connected Equipment General GFCI-Protected Receptacles Luminaires.32 250.36 250.10 680.24 250. and Clothes Dryers Receptacle Grounding Terminal to Metal Enclosure Separately Derived Systems Service Equipment—Grounding and Bonding Service Raceways and Enclosures 110. and for good reason.51 680.8 400.15 110.3 400. Ovens.60 348.22 348. It’s a great site packed full with technical information you need—and it’s FREE! Mike Holt Enterprises.10 400.92 MikeHolt.2 110.57 Description Section G General Requirements Approval of Conductors and Equipment Code Arrangement Conductor Sizes Conductor Termination and Splicing Copper Conductors Deteriorating Agents Enclosure Types Enforcement Examination of Equipment for Product Safety Examination.888.888.com is recognized as the number one Electrical Code Website in the world.9 110.30 348.42 348.6 250.94 250.16 90.20 348.20 90. Submersible Pumps.30 250.148 250.97 250.28 250.4 90. Identification. Installation.12 110.21 110.106 250.12 250.com • 1. Grounding and Bonding Bonding Metal Parts Containing 277V and 480V Circuits Bonding of Piping Systems and Exposed Structural Metal Buildings or Structures Supplied by a Feeder or Branch Circuit Clean Surfaces Generators—Portable and Vehicle-Mounted Grounding Electrode Conductor High-Impedance Grounded Systems Intersystem Bonding Terminal Lightning Protection System Main Bonding Jumper and System Bonding Jumper Metal Boxes Objectionable Current Protection of Fittings Ranges.56 680.62 250.55 680.MikeHolt.140 250.12 348. and Other Submersibel Equipment Methods of Equipment Grounding Signs in or Adjacent to Fountains Section 400.3 110. Inc. and Use of Equipment Flash Protection Warning Formal Interpretations High-Leg Conductor Identification Identification of Disconnecting Means Interrupting Protection Rating Mandatory Requirements and Explanatory Material Manufacturer’s Markings Mechanical Execution of Work Mounting and Cooling of Equipment Purpose of the NEC Scope of the NEC Short-Circuit Current Rating Suitable Wiring Methods Units of Measurement Voltages Wiring Integrity. 10 517.1 517.145 501.18 517.105 501.5 500.40 501.115 502.140 502.70 680.13 517.4 645.60 250.125 502.5 502.1 503.54 250.100 501.1 501.1 500.130 502. Motor Controllers.140 501.15 645.130 501.135 501.125 501.5 503.12 424.150 I Information Technology Equipment Cables Not in Information Technology Equipment Room Definitions Disconnecting Means Equipment Grounding Conductor Information Technology Equipment Room Penetrations Scope 645.44 680.10 503.58 250.120 502.7 500.2 645.130 503. Circuit Breakers.74 680.30 501.66 250.4 500.68 Description Luminaires Motors and Generators Multiwire Branch Circuits Receptacles and Attachment Plugs Scope Seals Switches.120 501.Index Description Systems Required to be Grounded Termination of Grounding and Bonding Conductors Grounding Electrode Auxiliary Grounding Electrodes Common Grounding Electrode Contact Resistance of Ground Rod to the Earth Grounding Electrode Installation Requirements Grounding Electrode System Grounding Electrode Types Lightning Protection Electrode Grounding Electrode Conductor Grounding Electrode Conductor Installation Grounding Electrode Conductor Termination Fittings Sizing Grounding Electrode Conductor Termination to the Grounding Electrode Section 250.71 680.140 503.9 501.10 502.52 250.120 503.6 645.56 250.10 645.1 6 Mike Holt’s 2008 NEC Index .2 500.15 502.16 517.30 503.20 250.1 502.125 503.64 250.20 501.72 H Hazardous Locations Classifications of Locations Definitions Equipment General Other Articles Protection Techniques Scope—Articles 500 Through 504 Specific Occupancies Hazardous Locations—Class I Conductor Insulation Conduit and Cable Seals Control Transformers and Relays Enclosures Flexible Cords Grounding and Bonding Limited-Energy and Communications Systems Luminaires Meters.150 501. Instruments.150 503.50 250.115 501.53 250. Motor Controllers.3 500.73 680. Circuit Breakers. and Fuses Wiring Methods Hazardous Locations—Class III Control Transformers Flexible Cords General Grounding and Bonding Limited-Energy and Communications Systems Luminaires Motors and Generators Receptacles and Attachment Plugs Scope Switches.30 502.145 503.2 517.40 502. and Fuses Wiring Methods Health Care Facilities Applicability Definitions Essential Electrical Systems for Hospitals General Care Areas Grounding of Equipment in Patient Care Areas Receptacles With Insulated Grounding Terminals Scope Wiring Methods Heating Cables Hydromassage Bathtubs Accessibility Equipotential Bonding General GFCI Protection Other Electrical Equipment Section 502.8 250. and Relays Motors and Generators Multiwire Branch Circuits Receptacles and Attachment Plugs Scope Transformers and Capacitors Utilization Equipment Wiring Methods Hazardous Locations—Class II Control Transformers Explosionproof Equipment Flexible Cords Grounding and Bonding Limited-Energy and Communications Systems 500.70 250.7 645.115 503.15 501.8 500.145 502.30 517.10 517. 10 356.4 90.64 410.46 342. Inc.2 701.136 410.22 342.12 350.14 342.24 410.70 411. Instructors.68 410.CODE (1.632.Index Description Supply Circuits and Interconnecting Cables Uninterruptible Power Supplies (UPS) Intermediate Metal Conduit Bends Bushings Couplings and Connectors Dissimilar Metals Listing Requirements Number of Bends (360°) Number of Conductors.5 645.10 410.10 410.28 342.42 342.22 350.com • 1.26 356.22 356.3 90.9 Description Coordination Definitions Equipment Approval Ground-Fault Protection of Equipment Scope Signs Tests and Maintenance Transfer Equipment Wiring Lighting Outlet Lighting Systems Operating at 30V or Less Listing Required Secondary Circuits Specific Location Requirements Liquidtight Flexible Metal Conduit Bends Fittings Grounding and Bonding Listing Requirements Number of Bends (360°) Number of Conductors Securing and Supporting Trade Size Uses Not Permitted Uses Permitted Liquidtight Flexible Nonmetallic Conduit Bends Equipment Grounding Conductor Fittings Listing Requirement Number of Bends (360°) Number of Conductors Securing and Supporting Trade Size Uses Not Permitted Uses Permitted Luminaires Branch-Circuit Conductors and Ballasts Clothes Closets Connection of Electric-Discharge Luminaires Cord-Connected Luminaires Listing Required Luminaire Mounting Luminaires Connected Together Luminaires in Specific Locations Luminaires Near Combustible Material Luminaires Used as a Raceway Outlet Boxes to be Covered Polarization of Luminaires Section 701. Reaming Securing and Supporting Trade Size Uses Permitted Introduction to the National Electrical Code Code Arrangement Enforcement Examination of Equipment for Product Safety Formal Interpretations Mandatory Requirements and Explanatory Material Purpose of the NEC Scope of the NEC Units of Measurement Section 645.6 342.2633) 7 .7 90.6 356.20 356.26 342.5 90.30 356.1 90.65 410.10 210.30 350.7 701. Inspectors.11 342.6 90.60 356.6 350.2 90.3 701. The forum is designed for Contractors.24 342.22 410.888.10 90.26 350.6 410.5 701.30 342. Electricians.17 701.5 411.60 350.18 701. and electrically related individuals.20 350.4 701.62 410.12 356.9 701.20 342.24 356. Mike Holt Enterprises.11 410. Engineers.16 410.42 356.50 L Legally Required Standby Power Systems Application of Other Articles Capacity and Rating 701.1 701. • www.NEC.4 350.888.6 If you have an electrical question that needs to be answered.24 350.3 411. this is the place to find the right answer.42 350.MikeHolt. 12 330.21 376.30 376.84 514.109 430.62 430.4 555.14 430.87 430.2 N Neutral Conductor Identification of Terminals Neutral Conductor Identification Polarity Terminal Identification Use of White or Gray Color Nonmetallic-Sheathed Cable Attics and Roof Spaces Bends Conductor Ampacity 200.Index Description Screw-Shell Lampholders Space for Cove Lighting Supports Section 410.10 376.30 330.15 555.2 555.7 555.80 8 Mike Holt’s 2008 NEC Index .19 555.3 604. Taps.10 200.7 334.30 Description Motor Controllers Controller for Each Motor Controller Rating Need Not Open All Conductors of the Circuit Motor Fuel Dispensing Facilities Circuit Disconnect Classification of Locations Definition Grounding and Bonding Maintenance and Service of Dispensing Equipment Raceway Seal Scope Underground Wiring Wiring and Equipment Above Class I Locations Wiring and Equipment Within Class I Locations Motors Disconnecting Means Combination Controller and Disconnect Disconnect Requirement Disconnecting Means Rating Marking and Mounting Operation of Disconnect Readily Accessible General Branch-Circuit Short-Circuit and Ground-Fault Protection Feeder Protection Location of Motors Motor Controller Terminal Requirements Motor Feeder Taps Overload Several Motors—Conductor Size Single Motor Conductor Size Table FLC Versus Motor Nameplate Current Rating Multioutlet Assemblies Through Partitions Uses Section M Manufactured Wiring Systems Construction Definition Other Articles Scope Securing and Supporting Uses Permitted Marinas and Boatyards Boat Receptacle Disconnecting Means Definitions Electrical Connections Electrical Equipment Enclosures Grounding Load Calculations for Service and Feeder Conductors Location of Service Equipment Motor Fuel Dispensing Stations—Hazardous Locations Receptacles Repair Facilities Scope Transformers Metal Wireways Conductors—Maximum Size.1 604.90 410.9 200.17 555.56 376.12 555.10 430.102 430.80 330.1 555.11 514.2 604.4 430.31 430.24 430.6 604.23 330.23 330.1 514.22 376.11 200.21 555.3 380.13 514.3 514.7 604.72 430.83 430.9 514.2 514.18 410.22 430.10 555.9 430. Number of Conductors and Ampacity Splices.22 555.6 200.8 514.6 380.111 430.16 514.104 430.24 334.12 376.24 330.7 514.108 330. and Power Distribution Blocks Supports Uses Not Permitted Uses Permitted Wireway Sizing Metal-Clad Cable Bends Conductor Ampacities Equipment Grounding Conductor Fittings In Accessible Attics or Roof Spaces Securing and Supporting Through or Parallel to Framing Members Uses Not Permitted Uses Permitted Motor Control Circuits Disconnect for Control Circuits Overcurrent Protection for Control Circuits Protection of Conductors from Physical Damage 604.40 330.73 430.75 430.28 430.17 330.5 376.9 555.103 430.23 334.107 430.52 430. 41 408.104 334.133 770.11 680.110 770.6 702.182 770.24 770. and Equipment Cord-and-Plug-Connected Equipment Definitions Electric Water Heater Equipment Rooms and Pits Equipotential Bonding Feeders 408.5 702.24 240.7 680.112 334.888.19 225.40 408.8 702.1 P Panelboards Circuit Directory or Circuit Identification Equipment Grounding Conductor Maximum Number of Overcurrent Devices Neutral Conductor Terminations Overcurrent Protection of Panelboards Panelboards in Damp or Wet Locations Unused Openings Permanently Installed Pools.6 240.4 240.17 225.888.3 770.16 225.15 225. Outdoor Spas.10 Description Spread of Fire or Products of Combustion Unlisted Cables Entering Buildings Optional Standby Power Systems Application of Other Articles Capacity and Rating Definition Equipment Approval Outdoor Generator Sets Scope Signs Transfer Equipment Wiring Overcurrent Ground-Fault Protection of Equipment Location of Overcurrent Devices Overcurrent Protection Location in Circuit Protection of Conductors Protection of Equipment Protection of Flexible Cords and Fixture Wires Standard Ampere Ratings Supplementary Overcurrent Protection Ungrounded Conductors Overhead Conductors Attachment Clearance for Overhead Conductors Clearances from Buildings Masts as Support Minimum Size of Conductors Supports Over Buildings Trees for Conductor Support Section 770.179 770.5 240.2633) 9 .9 240.37 408.25 Mike Holt Enterprises.4 408. Receptacles.113 770. and Outdoor Hot Tubs Area Lighting.6 334.2 702.3 240.15 225.7 680.26 680.MikeHolt.154 770.100 334. Inc.13 240.30 334.1 702.6 225.3 702.NEC.48 702.CODE (1.2 680.9 680.18 225.6 770.com • 1.11 702.17 334.26 770.21 240.108 334.54 408.12 770. • www.632.36 408.10 240.21 770.12 334.22 680.26 O Optical Fiber Cables and Raceways Abandoned Cable Access to Electrical Equipment Behind Panels Designed to Allow Access Applications of Optical Fiber Cables and Raceways Definitions Innerduct Installation of Optical Fiber Cables Listing of Optical Fiber Cables Listing Requirements for Communications Raceways Listing Requirements for Optical Fiber Cables Locations and Other Articles Mechanical Execution of Work Optical Fiber Cables Raceways for Optical Fiber Cables Scope 770.25 770.2 770.4 702.15 334.Index Description Conductors Construction Equipment Grounding Conductor Exposed Insulation Listed Securing and Supporting Through or Parallel to Framing Members Uses Not Permitted Uses Permitted Section 334. 49 725. and Power-Limited Circuits Class 1 Circuit Requirements Class 1 Circuit Classifications and Power-Supply Requirements Class 1 Circuit Conductors Class 1 Circuit Wiring Methods Conductors of Different Circuits in Same Cable.1 680. or Raceway Number of Conductors in a Raceway Class 2 and Class 3 Circuit Requirements Applications of Class 2 and Class 3 Cables Conductors of Different Circuits in Same Cable.8 680. Transformer.13 810.143 725. Air-Conditioning.48 352.57 810.12 680.22 352.11 410.35 725. Adapters.127 725.51 240.21 725.3 680.54 810.18 810.Index Description General Junction Box.10 210. Enclosure.1 R Radio and Television Equipment Amateur Transmitting and Receiving Stations— Antenna Systems Antenna Discharge Units Clearance on Building Grounding Conductors Other Sections General Community Television Antenna Other Articles Scope Receiving Equipment—Antenna Systems Antenna Discharge Unit Avoid Contact with Conductors of Other Systems Clearances Grounding Conductors Metal Antenna Supports—Grounding Support of Lead-In Cables Receptacles Attachment Plugs. Cord Connectors.3 725.3 210. or Raceway Equipment Marking Power Sources for Class 2 and Class 3 Circuits Separation from Power Conductors Support Wiring Methods on Load Side of the Class 2 or Class 3 Power Source Wiring Methods on Supply Side of the Class 2 or Class 3 Power Source General Abandoned Cable Circuit Requirements Definitions Electrical Equipment Behind Access Panels Mechanical Execution of Work Other Articles Safety-Control Equipment Scope Listing Requirements Listing and Marking Requirements of Class 2 and Class 3 Cables and Raceways Section 406.46 352.139 725.51 810. Dormitories.4 406.121 725.27 680.25 725.46 725.60 210.130 725.21 680.30 352.28 352.5 406.51 725.10 680. and Refrigeration (HACR) Equipment Receptacle Faceplates Receptacle Mounting Receptacle Rating and Type Receptacles in Damp or Wet Locations Receptacles in Guest Rooms. and Similar Occupancies Show Windows Tamper-Resistant Receptacles in Dwelling Units Recessed Luminaires Clearances Thermally Protected Wiring Remote-Control.58 810.12 406.3 810.31 725.54 352.20 352.24 352.24 725.2 406.52 406.136 725.60 352.115 410.15 810. or GFCI Enclosure Maintenance Disconnecting Means Motors Other Articles Overhead Conductor Clearance Scope Specialized Equipment Underground Wiring Location Underwater Luminaires Plug Fuses Edison-Base Fuse Type S Fuses Type S Fuses.124 725.10 Description Connecting Receptacle Grounding Terminal to Equipment Grounding Conductor Dwelling Unit Receptacle Outlet Require ents m General Installation Requirements Heating. Signaling.26 352.53 240.63 406.116 410.48 725.154 725.6 725.20 810.117 725.41 725.20 680.23 240. Enclosure. Guest Suites.62 406.44 352.2 725. and Flanged Surface Devices 810.24 680.1 810.12 352.4 810.179 10 Mike Holt’s 2008 NEC Index . and Fuseholders PVC Conduit Bends Bushings Equipment Grounding Conductor Expansion Fittings Joints Number of Bends (360°) Number of Conductors Securing and Supporting Trade Size Trimming Uses Not Permitted Uses Permitted Section 680.8 210.21 810. 31 338. Inc.26 230.10 230.30 386.30 344.14 344.76 230.632.90 230.20 344.71 230.43 680.95 230.40 230. The test is timed and divided up into sections so that you do not have to take the entire test at one sitting.42 344.22 386. Exam results are displayed at the end of each practice session.46 344.com • 1.3 230.2 230.28 344.60 386.32 230.82 230.6 386.10 230.23 230. The exams simulate real-life conditions and will help you determine those areas you need to study.888.24 344.40 680.NEC.34 386.54 230.MikeHolt. • www.28 230.6 230.70 386.7 230.42 230.10 Service-Entrance Conductors Cable Trays High-Leg Identification Number of Service-Entrance Conductor Sets Overhead Service Locations Protection Against Physical Damage Service Cable Supports Size and Rating Spliced Conductors Wiring Methods Spas and Hot Tubs Emergency Switch for Spas and Hot Tubs General GFCI Protection Indoor Installations Outdoor Installations Storable Swimming Pools General GFCI-Protected Receptacles Pumps Receptacle Locations Surface Metal Raceways Equipment Grounding Conductor Listing Requirements Number of Conductors Securing and Supporting Separate Compartments Size of Conductors Splices and Taps Uses Not Permitted Uses Permitted Section 344.56 230.22 344.46 230.12 386.6 344.8 230.10 S Service Disconnect Equipment Connected to the Supply Side of the Service Disconnect Grouping of Disconnects Manual or Power Operated Number of Disconnects Rating of Disconnect General Conductors Considered Outside a Building Not to Pass Through a Building or Structure Number of Services Raceway Seals Service Conductors Separate from Other Conductors Vegetation as Support Test your strengths and weaknesses with our simulated exams.CODE (1.31 680.24 338.30 680.24 230.79 230.27 230.Index Description Rigid Metal Conduit Bends Bushings Couplings and Connectors Dissimilar Metals Listing Requirements Number of Bends (360°) Number of Conductors Reaming Securing and Supporting Trade Size Uses Permitted Section Description Overcurrent Ground-Fault Protection of Equipment Overload Protection Required Service Drop Means of Attachment Point of Attachment Service Masts Used as Supports Size and Rating Vertical Clearance for Service-Drop Conductors Service Lateral Protection Against Damage Service-Lateral Conductor Size and Rating Service-Entrance Cable Bends Uses Not Permitted Uses Permitted 230.43 680.42 680.41 680.56 386.32 680.50 230.12 338.72 230.44 230.44 680.2633) 11 . Mike Holt Enterprises.888.51 230.26 344.21 386. 20 300.23 285.151 450. Plenums.24 285.6 340.17 300.14 300.3 450.4 404.12 404.15 Underground Feeder and Branch-Circuit Cable Ampacity Bends Insulation Listing Requirements Uses Not Permitted Uses Permitted 340.11 404.5 590.13 450. and Other Air-Handling Spaces Electrical Continuity Induced Currents in Ferrous Metal Enclosures and Raceways Inserting Conductors in Raceways Length of Free Conductors Mechanical Continuity Not Permitted in Raceways Panels Designed to Allow Access Protection Against Corrosion and Deterioration Protection Against Physical Damage Raceway Sizing Raceways Exposed to Different Temperatures Raceways in Wet Locations Above Grade Securing and Supporting Splices and Pigtails Spread of Fire or Products of Combustion Supporting Conductors in Vertical Raceways Underground Installations 300.7 300.5 285.18 300.6 404.7 404.10 404.112 340.Index Description Surge Protective Devices Listing Location Number Required Routing of Conductors Short-Circuit Current Rating Type 1 SPD—Line Side of Service Equipment Type 2 SPD—Feeder Circuits Type 3 SPD—Branch Circuits Uses Not Permitted Switches Accessibility and Grouping Circuit Breakers Used as Switches Damp or Wet Locations Grounding of Enclosures Indicating Mounting Snap Switches Position of Knife Switches Rating and Use of Snap Switches Switch Connections Switch Enclosures Switch Faceplates Switch Marking Section Description Section U 285.2 404.4 285.6 590.6 285.3 300.11 450.9 300.8 404.13 300.9 404.25 285.24 340.3 404.11 285.14 404.3 410.4 590.3 404.1 590.12 285.10 W Wiring Methods Boxes or Conduit Bodies Conductors Ducts.22 300.5 T Temporary Installations All Installations General Ground-Fault Protection for Personnel Listing of Decorative Lighting Scope Time Constraints Track Lighting Fastening Installation Transformers Accessibility Marking Overcurrent Protection Ventilation 590.23 300.154 410.11 300.8 300.12 340.12 300.9 12 Mike Holt’s 2008 NEC Index .2 590.80 340.15 300.19 300.10 300.6 300.21 300.4 300. MP3 Audio CD.com .NEC.CODE For access to lots of great free resources visit www. The Grounding versus Bonding Library includes a textbook/workbook. Mike's dynamic teaching style and detailed graphics easily explain the most difficult subjects. The NEC Library includes three textbooks and ten DVDs • Understanding the National Electrical Code—Volume 1 textbook • Understanding the National Electrical Code—Volume 2 textbook • NEC Exam Practice Questions book • General Requirements DVD • Grounding versus Bonding DVD • Wiring Methods and materials DVD • Equipment for General Use DVD • Special Occupancies DVD • Special Equipment DVD • Limited Energy and Communication Systems DVD Please contact the office directly to place your order and be sure to mention coupon code DC08GB. This library includes five books and eighteen DVDs for the Journeyman and twenty-one DVDs for the Masters program: • Theory textbook/workbook • 3 Theory DVDs • Understanding the NEC 1 & 2 textbooks • 10 Code DVDs • Exam Prep textbook/workbook • Simulated Exam • 5 Calculation DVDs plus 3 additional ones for the Masters program Please contact the office directly to place your order and be sure to mention coupon code DC08GB. Order today to take advantage of these special offers! Call 1.Want to pass your Journeyman or Master Exam the first time? Then order one of Mike Holt's Comprehensive Exam Prep libraries. and two DVDs. • Grounding versus Bonding textbook/workbook • Grounding versus Bonding two 4. 16-Hour Online Program.5 hour DVDs • 16-Hour Online Grounding versus Bonding Program • Grounding versus Bonding MP3 Audio CD Please contact the office directly to place your order and be sure to mention coupon code DC08GB.MikeHolt.888.