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

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Code 10 NEUTRAL CONDUCTOR PROTECTIVE DEVICES, ISOLATORS AND SWITCHES 10A Linked Circuit Breakers, Linked Isolators and Linked Switches (a) Any linked circuit breaker, linked switch or linked isolator with switched neutral should be arranged to have the neutral pole contact open after the phase pole contacts and should close before or at the same time as the phase pole contacts. (b) No fuse, circuit breaker, isolator or switch, other than a linked circuit breaker, linked isolator or linked switch, should be inserted in a neutral conductor. 10B Protection of Neutral Conductor A single pole switch should be inserted in the phase conductor of a single phase circuit only. No fuse, circuit breaker, isolator or switch, other than a linked circuit breaker, linked isolator or linked switch should be inserted in a neutral conductor. 10C Single-pole Switch in Earthing Conductor Notwithstanding Code 10B, a single-pole switch may be inserted between the earthing connection and the neutral terminals of generators running or likely to be running in parallel if it is recommended by the manufacturer and adequate precautions have been taken to avoid danger. 66
Code 11 EARTH LEAKAGE AND EARTH FAULT CURRENTS 11A General 11B Basic Requirements 11C Protective Conductors (1) Types of protective conductors (2) Sizing of protective conductors 11D Earthing of Exposed Conductive Parts (1) General (2) Types of exposed conductive parts (3) Circuit protective conductor (CPC) 11E Equipotential Bonding 11F Supplementary Bonding 11G Main Earthing Terminal 11H Earthing Conductor 11I Earth Fault Loop Impedance (Zs) 11J Residual Current Device (RCD) (1) Use of residual current device (2) Requirements for residual current device 11K Earth Electrodes 67
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CODE OF PRACTICE FOR THE ELECTRICIT
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Page 6G Final Circuits Using 16A In
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Page 17. Display of Labels and Noti
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Page Appendices 208 1. Prescribed R
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Code 1 INTRODUCTION PART I This Cod
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‘cable trunking’ means a manufa
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‘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
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Page 55: (3) Devices for switching off for m
Page 58 and 59: Code 9 OVERCURRENT PROTECTIVE DEVIC
Page 60 and 61: Overload protective devices may hav
Page 62 and 63: Table 9(1) Limiting Final Temperatu
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Page 68 and 69: Code 11 EARTH LEAKAGE AND EARTH FAU
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Page 76 and 77: (d ) Where a residual current devic
Page 78 and 79: (c) Values of k for protective cond
Page 80 and 81: Table 11(4) Minimum Cross-sectional
Page 82: Table 11(11) Maximum Earth Fault Lo
Page 85 and 86: Code 12 EARTHING ARRANGEMENT 12A Ge
Page 87 and 88: (4) Plate electrode Plate electrode
Page 89 and 90: Code 13 CONDUCTORS, JOINTS AND CONN
Page 91 and 92: (a) the ambient temperature does no
Page 93 and 94: (2) Identification of cable cores (
Page 95 and 96: Code 14 WIRING INSTALLATION ENCLOSU
Page 97 and 98: (b) Flexible steel conduits should
Page 99 and 100: 14E Cable Capacity of Enclosures (1
Page 101 and 102: Table 14(2) Cable Factors and Condu
Page 103 and 104: Table 14(4) Cable Factors and Trunk
Page 105 and 106: Code 15 ADVERSE CONDITIONS INSTALLA
Page 107 and 108: (c) Where cables are to be connecte
Page 109 and 110: (d ) Electrical equipment and wirin
Page 111 and 112: (b) There should be adequate means
Page 114 and 115: Table 15(4) Selection of Electrical
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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
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Code 18 ALTERATIONS AND ADDITIONS 1
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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
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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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146
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Code 22 MAKING AND KEEPING OF RECOR
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Checklists Requirements to be Used
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Code 23 & Code 24 (Reserved for Fut
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Part II Code 25 GENERAL WORKMANSHIP
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equipment should be suitable for th
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(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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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
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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
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(f ) Supply from generator set Wher
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manufacturer’s instructions. Othe
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• SELV, the source for SELV being
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protected by an RCD having the char
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(2) Basic protection and fault prot
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plug. The permanent connection to t
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prevent electric shock to electrica
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Table 26(1) Recommended Number of S
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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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contact with appropriate socket con
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(ii) between live parts and any oth
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(1) General Appendix 3 Prescribed R
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(d ) An earthing terminal should be
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Appendix 4 Prescribed Requirements
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(5) Screws and connections (a) Scre
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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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280 Contactor Main make contact of
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282 Junction, connection point
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No. Symbol Description 45. 46. 47.
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No. Symbol Description 68. 69. 70.
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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
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BS 88 Part 6 Cartridge fuses for vo
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References may be made to the follo
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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
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Double insulation Duct Earth fault
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Joints and termination Labels bondi
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Socket outlets general installation
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Code of Practice for the Electricity (Wiring) Regulations - 2009 Edition

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