Code of Practice for the Electricity (Wiring) Regulations - 2009 Edition

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Page 6G Final Circuits Using 16A Industrial Socket Outlets to Requirements Prescribed in Appendix 4 39 6H Final Circuits Using 32A, 63A or 125A Industrial Socket Outlets to Requirements Prescribed in Appendix 4 39 7. Current Demand 46 7A Current Demand of a Circuit 47 7B Determination of Current Demand 47 8. Isolation and Switching 50 8A Provision of Isolation and Switching 51 8B Requirements of Isolation and Switching Devices 53 9. Overcurrent Protective Devices 57 9A General Requirements 58 9B Relation Between Circuit Conductors and Overcurrent Protective Devices 58 9C Breaking Capacity of Overcurrent Protective Devices 59 9D Position of Overcurrent Protective Devices 60 9E Other Requirements of Overcurrent Protective Devices 61 10. Neutral Conductor Protective Devices, Isolators and Switches 65 10A Linked Circuit Breakers, Linked Isolators and Linked Switches 66 10B Protection of Neutral Conductor 66 10C Single-pole Switch in Earthing Conductor 66 11. Earth Leakage and Earth Fault Currents 67 11A General 68 11B Basic Requirements 68 11C Protective Conductors 69 11D Earthing of Exposed Conductive Parts 70 11E Equipotential Bonding 71 11F Supplementary Bonding 72 11G Main Earthing Terminal 73 11H Earthing Conductor 74 11I Earth Fault Loop Impedance (Zs) 74 11J Residual Current Device (RCD) 75 11K Earth Electrodes 76 4
Page 12. Earthing Arrangement 84 12A General 85 12B Bonding Connections to the Point of Supply 85 12C Earth Electrode 86 13. Conductors, Joints and Connections 88 13A Selection and Sizing of Cable Conductors 89 13B Basic Protection 91 13C Joints and Connections 91 13D Other Requirements of Cables 92 14. Wiring Installation Enclosure 95 14A General Requirements 96 14B Steel Conduit System 96 14C Steel Trunking System 97 14D Plastic or PVC Conduit or Trunking 98 14E Cable Capacity of Enclosures 99 14F Enclosures of Busbar Trunking System and Powertrack System 100 14G Workmanship 100 15. Adverse Conditions Installation 104 15A Presence of Water (AD) or High Humidity (AB) 105 15B Ambient Temperature (AA) 106 15C Presence of Corrosive or Polluting Substance (AF) 107 15D Installation Exposed to Fire or Explosion 108 15E Impact (AG) 109 15F Vibration (AH) 110 15G Other Mechanical Stresses 110 16. Overhead Line Installations 116 16A General 117 16B Installation of Overhead Lines 117 16C Joints of Overhead Lines 117 16D Service to Building 117 16E Conductor to Ground Clearance 117 16F Pole 118 16G Stay Wire 118 16H Carrier Wire 118 16I Earthing of Metallic Parts and Earth Leakage Protection 119 5
Page 2 and 3: CODE OF PRACTICE FOR THE ELECTRICIT
Page 6 and 7: Page 17. Display of Labels and Noti
Page 8 and 9: Page Appendices 208 1. Prescribed R
Page 10 and 11: Code 1 INTRODUCTION PART I This Cod
Page 12 and 13: ‘cable trunking’ means a manufa
Page 14 and 15: ‘powertrack system’ means an as
Page 16 and 17: Code 3 APPLICATION 3A General Appli
Page 18 and 19: Code 4 GENERAL SAFETY REQUIREMENTS
Page 20 and 21: warning notices and the placing of
Page 22 and 23: 4E Working Space (a) A minimum clea
Page 24 and 25: Additional lighting should be provi
Page 26 and 27: (b) Work procedure for High Voltage
Page 28 and 29: (ii) Keep hands away from any circu
Page 30 and 31: Code 5 SEGREGATION OF CIRCUIT CATEG
Page 32 and 33: (i) A minimum horizontal or vertica
Page 34 and 35: Code 6 CIRCUIT ARRANGEMENT 6A Divis
Page 36 and 37: (2) Control Each circuit should be
Page 38 and 39: (4) Permanently connected equipment
Page 40: Type of Circuit A1 Ring A2 Radial A
Page 47 and 48: Code 7 CURRENT DEMAND 7A Current De
Page 49 and 50: Purpose of Conductors or Switchgear
Page 51 and 52: Code 8 ISOLATION AND SWITCHING 8A P
Page 53 and 54: (iv) luminaires (lamp replacement a
Page 55:
(3) Devices for switching off for m
Page 58 and 59:
Code 9 OVERCURRENT PROTECTIVE DEVIC
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Overload protective devices may hav
Page 62 and 63:
Table 9(1) Limiting Final Temperatu
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Table 9(4) Classification of MCB to
Page 66 and 67:
Code 10 NEUTRAL CONDUCTOR PROTECTIV
Page 68 and 69:
Code 11 EARTH LEAKAGE AND EARTH FAU
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(b) Subject to subparagraph (a) abo
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(Note: 1. An extraneous conductive
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(d ) Where a residual current devic
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(c) Values of k for protective cond
Page 80 and 81:
Table 11(4) Minimum Cross-sectional
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Table 11(11) Maximum Earth Fault Lo
Page 85 and 86:
Code 12 EARTHING ARRANGEMENT 12A Ge
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(4) Plate electrode Plate electrode
Page 89 and 90:
Code 13 CONDUCTORS, JOINTS AND CONN
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(a) the ambient temperature does no
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(2) Identification of cable cores (
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Code 14 WIRING INSTALLATION ENCLOSU
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(b) Flexible steel conduits should
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14E Cable Capacity of Enclosures (1
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Table 14(2) Cable Factors and Condu
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Table 14(4) Cable Factors and Trunk
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Code 15 ADVERSE CONDITIONS INSTALLA
Page 107 and 108:
(c) Where cables are to be connecte
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(d ) Electrical equipment and wirin
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(b) There should be adequate means
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Table 15(4) Selection of Electrical
Page 116 and 117:
Code 16 OVERHEAD LINE INSTALLATIONS
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(2) Any point of the span The condu
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Code 17 DISPLAY OF LABELS AND NOTIC
Page 124 and 125:
Code 18 ALTERATIONS AND ADDITIONS 1
Page 126 and 127:
Code 19 FIRST INSPECTION, TESTING A
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Code 20 PERIODIC INSPECTION, TESTIN
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(b) Examples of the above are dange
Page 132 and 133:
Code 21 PROCEDURES FOR INSPECTION,
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21B Testing of Low Voltage Installa
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(6) Polarity (a) A test of polarity
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(d ) Secondary Injection Test (i) T
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will have affected the results of t
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142
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144
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146
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Code 22 MAKING AND KEEPING OF RECOR
Page 150 and 151:
Checklists Requirements to be Used
Page 152 and 153:
Code 23 & Code 24 (Reserved for Fut
Page 154 and 155:
Part II Code 25 GENERAL WORKMANSHIP
Page 156 and 157:
equipment should be suitable for th
Page 158 and 159:
(2) Installation of PVC insulated,
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(c) Where cold compound with plasti
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(b) Earth continuity across joints
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Table 25(2) Spacing of Supports for
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166
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Code 26 REQUIREMENTS FOR SPECIFIC I
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Code 26 REQUIREMENTS FOR SPECIFIC I
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(iii) controls and switches of wate
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(vi) Except as provided by (vii) wh
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(b) Facilities should be incorporat
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(3) Starting facilities of electric
Page 180 and 181:
than the product of the total stead
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(5) Transformers (a) Every transfor
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(b) Electrical apparatus and wiring
Page 186 and 187:
(f ) Supply from generator set Wher
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manufacturer’s instructions. Othe
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• SELV, the source for SELV being
Page 192 and 193:
protected by an RCD having the char
Page 194 and 195:
(2) Basic protection and fault prot
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plug. The permanent connection to t
Page 198 and 199:
prevent electric shock to electrica
Page 200 and 201:
Table 26(1) Recommended Number of S
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202
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204
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206
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APPENDICES 1. Prescribed Requiremen
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(d ) The spacing of the socket cont
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diameter of the clamping screw and
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214
Page 216 and 217:
216
Page 218 and 219:
contact with appropriate socket con
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(ii) between live parts and any oth
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222
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224
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(1) General Appendix 3 Prescribed R
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(d ) An earthing terminal should be
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230
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232
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234
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Appendix 4 Prescribed Requirements
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(5) Screws and connections (a) Scre
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240
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242
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244
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246
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248
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250
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Appendix 5 Correction Factors for S
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(3) Correction factors for cables e
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Appendix 6 Current Carrying Capacit
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TABLE A6(1) Single-core PVC insulat
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TABLE A6(2) Multicore PVC insulated
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TABLE A6(3) Single-core armoured PV
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TABLE A6(4) Multicore armoured PVC
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TABLE A6(5) Single core XLPE insula
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TABLE A6(6) Multicore XLPE insulate
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TABLE A6(7) Single-core XLPE insula
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TABLE A6(8) Multicore armoured XLPE
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274
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276
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278
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280 Contactor Main make contact of
Page 282 and 283:
282 Junction, connection point
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No. Symbol Description 45. 46. 47.
Page 286 and 287:
No. Symbol Description 68. 69. 70.
Page 288 and 289:
Appendix 10 Degree of Protection Pr
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Appendix 11 Forms of Internal Separ
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Appendix 12 Worked Examples for App
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Appendix 13 A) Schedule of Test Res
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(iii) All joints of metal conduit o
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Checklist No. 4—Additional Items
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(iv) Suitable stay wires installed
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Tested by/Date (N/A if not applicab
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(vii) Protective conductor up to an
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Checklist No. 5—Items for H.V. In
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IEC 60947 Low-voltage switchgear an
Page 316 and 317:
BS 88 Part 6 Cartridge fuses for vo
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References may be made to the follo
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320
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(3) Precautions In the new colour c
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5.2 Single-phase installation Exten
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5.3 Three-phase installation Extens
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enclosure in conduit and trunking i
Page 334 and 335:
Double insulation Duct Earth fault
Page 336 and 337:
Joints and termination Labels bondi
Page 338:
Socket outlets general installation
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Code of Practice for the Electricity (Wiring) Regulations - 2009 Edition

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