BS EN 62305-2 Risk Assessment Questionnaire. R. C. Cutting Co. Ltd.Case details Client name: Project Name: Project address: Project ref: Questionnaire completed by: Of: Date: BSEN62305 requires a Risk Assessment calculation to be carried out to determ ine which of the 4 levels of Lightning Protection is required (Levels I to IV) Important Notes - please read The questions herein are part of BSEN62305, and the resul tant Risk Assessment has to be carried out for all buildings. Please note that this assessm ent cannot take place until the information is received, and a design and quotation cannot commence, so it is important that we receive answers to the questions below. Now an essential part of Lightning Protection is the fiiting of surge protection equipment to protect the sensitive electronic equipment within the building. To fully develop the deisgn, we will need detailed information on all plant and equipment at roof level and whether each item is connected back to a distribution board to decide whether separate surge protecti on at roof level is required. We accept that certain information may not be available, and our Risk Assessment software is programmed to enter default data (on a 'worst case' basis) which is likely to increase the level of Lightning Protection required, and subsequently increase the costs. There are now four risks of lightning damage that can be considered, with the primary risk being that of 'Loss of Human Life' - R1. Unless specified to the contrary this will be the sole loss that is considered. All four, or a selection may be preferred. Notes Risks being considered: R1 : Risk R2 : Risk R3 : Risk R4 : Risk of loss of human life (This is the most important risk) of loss of service to the public of loss of cultural heritage of loss of econom ic value Tick the relevant options shown to the left. Unless indicated to the contra ry - the sole risk R1 will be considererd. Page 1 of 7 3 2.100mm max opening Conductive frame with conducting cladding .Height of buildings less than 10m Urban . Cutting Co.5) 2 2.III or II Non conducting with LPS level I Conductive frame with non conducting cladding Conductive frame with conducting cladding .2 2. Ltd. or enter a user specified value (of KS1) at the bottom of the list. 1 1.4 Service line density: Ce Tick one of the options shown to the left.3 Soil resistivity (Wm): Location relative to surroundings: 1.4 Structure length (m) Structure width (m) Structure height (m) User specified Lb Wb Hb Page 2 of 7 . We can insert this data if you do not know it.2) Ng Td r Cd 1. If in doubt the option 'Non conducting . If not known 500 W m will be assumed Object surrounded by higher objects or trees Object surrounded by objects or trees of the sam e height or smaller Isolated object: no other objects in the vicinity Isolated object on a hilltop or knoll Rural Suburban .Height of buildings greater than 20m Tick one of the options shown to the left.timber. (Ref BS EN 62305-2 T able A. R. C.timber.typical door openings Conductive frame with conducting cladding .10mm max opening Structure fully clad with metal .1 Structure definition Shield at structure boundary: Notes K S1 Non conducting .1 Environmental influences Lightning activity Notes Flashes to ground per k m 2 per annum Thunderstorm days/year: Enter a value in one of the boxes.Height of buildings ranging between 10m and 20m Urban with tall buildings . masonry structure and cladding Non conducting with LPS level IV. masonry structure and cladding' will yield a more conservative result K S1 2. (Ref BS EN 62305-2 T able A.BS EN 62305-2 Risk Assessment Questionnaire.no openings Tick one of the options shown to the left.2 1. (Ref BS EN 62305-2 T able A.please specify height above ground If not known .Socket outlets (electronic equipment) 2.3 (Ref BS EN 62305-2 T able A.routing precautions in order to avoid large loops Unshielded cable .3 Presence of HV/LV transformer: Connected equipment withstand: Ct Service only Service with 2 windings transformer 1.4 Uw 3.routing precautions in order to avoid loops Shielded cable 5 < Rs <= 20 Ohm s/km Shielded cable 1 < Rs <= 5 Ohm s/km Shielded cable Rs <= 1 Ohm s/km Tick one of the options shown to the left. Please ensure that at least the Power Shielded cable with no bonding column is completed.Sub-distribution board (electrical equipment) 4 kV .6 3.6m will be assumed If not known 1000m will be assumed Object surrounded by higher objects or trees Object surrounded by objects or trees of the sam e height or smaller Isolated object: no other objects in the vicinity Isolated object on a hilltop or knoll Tick one of the options shown to the left. If in doubt use the same option chosen at 1.5 kV . Cutting Co.8 Height of line (m): Length of line (m): Location relative to surroundings: Hc Lc Cd For Aerial cables .5 kV .5 Type of service: Tick one of the options shown to the left. 3.BS EN 62305-2 Risk Assessment Questionnaire. 3.4) Tick one of the options shown to the left. Shielded and bonded cable 5 < Rs <= 20 Ohm s/km If in doubt the option 'Unshielded cable' will yield Shielded and bonded cable 1 < Rs <= 5 Ohm s/km a more conservative result Shielded and bonded cable Rs <= 1 Ohm s/km Unshielded cable .Main distribution board 6 kV.2) Page 3 of 7 . Ltd.Electricity meter Aerial Buried Tick one of the options shown to the left.7 3. C. If in doubt the option 'Unshielded cable . R.1 3.no routing precautions in order to avoid loops' will yield a more conservative result 3.no routing precautions in order to avoid loops Unshielded cable . 3 3.1 Line definition Line identification: Incoming line type: P = Power T = Telecoms O = Other (please specify)_____________________________ Notes P T O Tick one of the options shown to the left for each Unshielded cable service.2 Internal wiring type: 3. BS EN 62305-2 Risk Assessment Questionnaire. r a/r u Agricultural Concrete Marble None Low 4.no openings 4.timber.typical door openings Conductive frame with conducting cladding . C.6 Shield at zone boundary: K S2 If not known the option 'Non conducting . Ceramic Gravel Carpet Ordinary High Asphalt Linoleum Wood Explosion Tick one of the options shown to the left.3 Zone definition Zone identification: Zone location: Type of soil or floor: Inside the structure Inside the structure Notes It is possible to separate a building into zones. 4 4.1 4. Cutting Co. Ltd.100mm max opening Conductive frame with conducting cladding .tick Ordinary If the Automatic system is not fitted with Surge Protection Devices (SPD's) tick the Manual option 4. Or enter a user specified value (of KS2) at the bottom of the list. masonry structure and cladding Conductive frame with non conducting cladding Conductive frame with conducting cladding . R. masonry structure and cladding' will yield a more conservative result.5 rp None (or known risk of explosion) Manual extinguishers or alarms Automatic extinguishers or alarms Non conducting . K S2 User specified Page 4 of 7 .10mm max opening Zone fully clad with metal .2 4. If this is necessary we will approach you later for more information.timber.4 Risk of fire or physical damage: Fire protection system: rf Where specific information is not known or available . occupants <100) Average level of panic (e.3 L f1 Due to fire or physical damage: Please indicate the use of the building. None Factory Medical centre Shops/shopping centre Airport building Farm building Museum Sports stadium Base station Fuel/service station Petro chem plant Substation Block of flats Gas compound Care home Telephone exchange Cathedral Halls of residence Emergency service Theatre Church Hospital Power station University Civic building Hotel Prison Water treatm ent works Commercial/office block Industrial warehouse Railway station Wind farm Community centre Large house Ruin Departmental store Leisure centre School User specified .g. occupants <1000) Difficulty of evacuation (e. Hospitals User specified . limited to two floors. occupants >1000) Hazard for surroundings or environment Contamination for surroundings or environment This is the primary and sole loss that will be considered (R1) unless indicated to the contra ry on Page 1. Cutting Co.g.g.7.7.BS EN 62305-2 Risk Assessment Questionnaire. This section only needs to be com pleted for buildings with Risk of Explosion or Hospitals or such buildings where the loss of service would immediately endanger life. Number of people that are likley to be in the building.2 Due to step & touch voltage: L t1 Uninhabited Inhabited internal zone Inhabited external zone User specified .1 Loss of human life Due to special hazard: h Z1 No special hazard Low level of panic (e. immobilized persons.7. cultural or sport events. Ltd.7 4. Number of people that are likely to be in the building. 4. 4.Please indicate the following 4.g.4 Due to overvoltage: L o1 Number of hours per day the building will be occupied. None Risk of explosion Safety critical systems ie. Page 5 of 7 . cultural or sport events. R.Please indicate the following Number of hours per day the building will be occupied. C.7. Number of people that are likely to be in the building. hospitals) High level of panic (e. 4.Please indicate the following Number of hours per day the building will be occupied. R3 f rom Page 1. Stately home etc. Public Buildings Hospitals. Hotels. User specified .Public entertainment. Offices.R2 f rom Page 1. Museum.10. Cutting Co. Churches Hospitals.10. Hotels 4. Prisons.BS EN 62305-2 Risk Assessment Questionnaire.9 No service provided Gas Water Power Communications Government Health Financial Manufacturing Retail Leisure User specified Manufacturing Retail Leisure Number of hours per day the building will be occupied. Otherwise go to Section 4. 4. Agricultural.4 Due to overvoltage: L o4 Page 6 of 7 .10 Loss of Economic Value Only to be com pleted if Loss of Economic Value is being considered .2 Due to overvoltage: L o2 No service provided Communications Gas Government Water Health Power Financial User specified . C.Please indicate the following L f3 Number of hours per day the building will be occupied. Otherwise go to Section 5 No special hazard Hazard for surroundings or environment Contamination for surroundings or environment None Agricultural properties with animals inside / outside the structure No ecenomic loss Schools.8 Loss of service to the public Only to be com pleted if Loss of Service to the Public is being considered .8. Otherwise go to Section 4.R4 f rom Page 1. Ltd.10.1 Due to fire or physical damage: L f2 4. 4. Industrial.2 Due to step & touch voltage: 4.10 None Museum. Number of people that are likely to be in the building. Agricultural None Risk of explosion Museums.9.Please indicate the following 4. Churches. R. Schools.1 Loss of Cultural Heritage Due to fire or physical damage: Only to be com pleted if Loss of Cultural Hertiage is being considered .3 Due to fire or physical damage: L t4 L f4 4. Number of people that are likely to be in the building. 4. Commercial.1 Due to special hazard: h Z4 4.7. Industrial or commercial complex.8.9 4. Main Power service Single Phase .240V Three Phase .0 Cost of any animals in this zone Cost of any systems in this zone Cost of the building Cost of the contents of this zone C PM I a m Cost of protection measures Interest rate Amortization rate Maintenance rate Surge Protection at Service Entry Point The bonding of all services should always be ensured. 4.415V Page 7 of 7 . Ltd. Cutting Co.11 Costs of loss Information required to calculate costs of loss versus savings derived from fitting Lightning Protection. CA CS CB CC 5.BS EN 62305-2 Risk Assessment Questionnaire. R. including the provision of equipotential bonding of all power and telecomms line conductors at their point of entry to the structure using Surge Protection Devices (SPD's) as this will minimise potential differences and m ay reduce radiated magnetic fields. C.
Report "BS EN 62305-2 Risk Assessment Questionnaire"