IEE On- Site Guide: To BS 7671 : 201 (2004) Including Amendments No 1 : 2002 and No 2 : 2004)Iee Wiring Regulations Brown

184 Pages·2004·1.28 MB·English

ON-SITE GUIDE
BS 7671 : 2001 (2004)

Wiring Regulations
16th Edition

Including Amendments
No 1: 2002 and Na 2 = 2008

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Published by: The IE, LONCON, UK
(22004 The Institution of Electrical Engineers

Printed February 1992
Reprinted fay 1953, with amendments

Reprinted July 1983, with arendemant (appends)

Reprinted February 1994 with amendaents

Revised February 1995 to honmporate Amendment No 1 lo 857671
Revsed lune 198, new cover only

Reveed line 1996 to inconprate fender No 2108S 7671
Revised Feb 2002 to incorporote BS 7671 200, ine Ard No 12502
Repvinted July 2003,neecover only

Revised Apr 2004 to incorporate BS 7571: 2001 Ie Ard No: 2000

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CONTENTS

PREFACE
FOREWORD

SECTION 1. INTRODUCTION

1 scape
112. Basie Information Required

SECTION 2, THE SERVICE POSITION

2 General Layout of Equipment
22, Function af Componente:

SECTION 3, PROTECTION

131 Types of Protective Devices)
32 Overload Protection

39 Fault current Protection

344. Protection Against Elecic Shock
35. Disconnection Times

316. Residual Current Devices (RCO)

SECTION 4. BONDING AND EARTHING

“44 Main Equipotential Bonding of Meal
Services Figs a. Ac)

42. Main Earthing and Main Equipotential
Bonding cond.ctor Cross sectional Arwas

43 Main Equlpotential Bonding - Plastic Senvces

44 Eanhing

45. Supplementary Equipatentia! Bonding in
locations of Inreared Shark Risk = Metal
Pipework

46 Supplementary Bonding in other Locations -
Metal Pipework

447” Supplemencary Bonding of Plc Pipe
installations

48 arth Electrode {Fig 4)

49. Typesot tanh Electrode

4410 Typical Earting Arrangements
SECTIONS. ISOLATION AND SWITCHING 28

‘54 Islation Py
52. Functional witching ea
54. Switching Off or Mechanical maintenance 35
5a etrergency sulting ES
SECTION 6. LABELLING ”
‘6.4 Labeleto be Provided 2
SECTION ?. FINAL CIRCUS a0
7A Final Grcuits 40
72 Using the Tabulated Final Cicuits a
73 Intalation Considerations 32
ZA Smoke Alarins and Emergency Lighting 56

SECTION 3. SPECIAL LOCATIONS GIVING RISE TO
INCREASED RISK OF ELECTRIC SHOCK 58

181 Locations Containing a Bath er shower 5
8.2. Shower Cubicles ina Room used for Other
Purposes eo

163 Temporary and Garclen Builings, Dorestle
Garages, Buildings of Lightweight

Eanstrction ete «
84 Enrthing requirements of Equipment
having High Protective Conductor Curemt 60
SECTION 9, INSPECTION AND TESTING oa
31 Inspection and Testing 6
32 Inspection e
94 testing 6
SECTION 10. GUIDANCE NOTES ON INITIAL TESTING OF
INSTALLATIONS. 66
10.1 Safety and equipment 56
10.2 Sequence of Tess 5

1013 Tet Procedures co
SECTION 11. OPERATION OF RESIDUAL CURRENT
OPERATED DEVICES(RCDs) AND.
RESIDUAL CURRENT BREAKERS WITH
OVERCURRENT PROTECTION {RCBOs)

1114 General Te: Procedure

11.2 General purpose RCDs 0 BS 4293

113 General purpose CCHS to BS EN 61008 oF
RCBOR 10 BS EN 51009

11.4 ROD protected sockel-oulets to 05 7288

11> addtional Requlreinent for Supplementary
Protection

116 integral Tes. Device
APPENDICES.

1

Maximum demand and diversity

2. Maxirum permisible measures earth
Fault loop Impedance
2 Notes on the selection of types of
‘able and flexible cord for particilar
Uses and external influences
4 Notas on methods of support tor
‘ables, conductors and wiring Systeme
5 Cable capacttos of coulurt and
‘tunking
6 Current-carrying copacites and
voltage drop for copper conductors
7 Gertfication and reporting
8 Standard circuit arrangement for
‘nourahold and similar installations
9. Resistance of copper and s'uminium
conductors
“0. Protective conductor sizing
11 dentition of conductors
INDEXES
(@)Theinsta lation
(i) Bonding and earthing
{ii} Spacal locations and REDS
(2) lespectlon and testing
(Alphabetical

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157
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164

17
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174
176
178
Co-operating Organisations
‘he te ackncaladgee the contribution made by the following organisations
Inthe preparation at tN guide
-uciation 6 Manufacturers of Comes Fleeces
‘Sa MacConmacher 8 CEng MEE
Me ali td
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PD Stoke ta CEng hes
‘itn standard rertion
‘iy & Guid of orton insttute
"WR Lovegrove eng FE
fteepieal Contactar Arcrition
D Locke eng Acs
HHeevical Cantons’ Assxiaion uf Sealand Ua SELECT
‘el ng MIE MILE
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ERA Technology
WW Coates BEng
Federcln ofthe Elections Inhow'y
FW deatson CEvg MIE
‘ne Gawbien axocation Ltd
Ror BS CEng MIFE
Heath a Safery executive
Tur nglA Mela Bic CEng FEE FICSH
Instion 2 Incorporated Engineers
Taal rg ME
Lahtion associat on
KR Kear rg ot
Natioral specionCouitor Bevin real. Cerwacing
safety Aswsineyt Federa.an Lite
“Serna BS ene) CEng MEE
Soret of Cece ae! Mechaniltngree seg Local Governmert
(Ed Tanel CEng MEE MBSE

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PREFACE

‘The On-site Guide is one at 2 number of publications prepared by
{he IE to simplify some aspects af 85 7671: 2001 (2004) Requirements
for Electiea rstaations (EE Wiring Regulations Sisteerth Edron)
85 7671 is ajoire publication of the British Standards Institution andl
the Pisituion of Electrical Engineers

‘The scape generally follows that of BS 7671, fe includes material nat
inluded in 8S 7571, provides background ta the intentions of BS 7673,
and gees other sources of iormatin,

However, this quide does not ensure compliance with BS 7671.1 fea
simple guide to the requirements of 85 7671, and electricians stould
always consult BS 7671 to satisfy themselves cf vompliance

Its expected that persons camrying out werk in accordance with this
tulde willbe competent to do 80

Evectrical installations in the United Kingdom which comply with the
IEE Wrring Regulations, ES 7671, should alee comply ‘with the

Statutory Regulations siwh ae the Elect at Work Regulntions W001

1983, H cannot ba guaranteed thet BS 76?" complies with all
felevant Regulations abd fis sssed that iti essental to estabish
what statutory andl other Regulations apply and to. install

Sccorelingly. For example, on instalation in Licensed Preises may Appl

Fave requiremen's aifterent fram or addtional to BS 7671 and these
sl take precedence over BS 7671
FOREWORD

‘his Guide fs concemed with Rmited app
sxcorlance with para 1 Senpe,

85 7671 and the On-Site Guide are not dasign guides. ti exential to
Prepare aschedls of the srk to be dane prior to commencernent
ralteration ofan elecceal installation and ta provide all necessary
Information and operational manuals of ary equipment suppl
the scr on completion,

‘Any specification should ct wut the detailed design and provide
sutficent informaiton to enable competent penn to cary oul the
insallation erd to cormmission K Tre specication mist meee 3
dlesrptfon of how the system is to operate and al af he design and
(pe-stional parameters.

‘The spectation must provide forall the commissioning procedures
that wll be required and for the produrtion of any operational
manuel

te must be noted that itis a matter of cartvact z= 10 which person
cor argarisation i responsible forthe production af the parts of the
Sesign,sperieation ard any operational manual

The persons of organisations, wha may be concemed in the
prewaration of the speciation include:

The Designer
The neallers)

The Electric Distributor

‘The intaPation Gsvner andor User
The Archivedt

The Fo Prevention Officer

‘The Hanning Supervisor

Ab Regulatory Authors

Any Leersing Authority

‘The Heath and Safety Exeauive
in producing the specification advice should be sought from the
Installation awnee andor user 35 to the intended use. Often, such
2s ina speculative building, the detailed intended use is unknown. In
‘those reumsarces the spéeftation andlor the operational manual
Tnust stout the boss of une Tor whch the ntallaton suitable

Precise details of each item of equipment should be cbtained from
‘he manufacturer aneior supplier and compliance vith appropriate
Bandards confirmed.

“The operational manus must inckide a description of how the
sjslan as nstaled isto operate and all commésioning records. The
manual should alto include manufacturers techmical data for all
Roms of swileigea, huininaives, accesrories ste and ary special
ingtrocions that ray be needed. The Health ond Safety al Work etc
‘AEt 1974 Section § and the Censtrucion (Design and Managemen)
Regulations 1994 are concerned with te provsion of information.
{Guidance on the preparation of tachnical manuals given in BS 4834
‘Specification for echnical manuals) ard B§ 4849 (Recommendations
for the preeentation of technical information about products and
Services in the construction industry the size and complex oF the
installers vil ciate the nature and extent oF the mana,

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