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Guide to the IET Wiring Regulations: IET Wiring Regulations (BS 7671:2008 incorporating Amendment No 1:2011), 17th Edition

ISBN: 978-1-119-94169-9
384 pages
March 2012
Guide to the IET Wiring Regulations: IET Wiring Regulations (BS 7671:2008 incorporating Amendment No 1:2011), 17th Edition (1119941695) cover image

Description

This authoritative, best-selling guide has been extensively updated with the new technical requirements of the IET Wiring Regulations (BS 7671: 2008) Amendment No. 1:2011, also known as the IET Wiring Regulations 17th Edition. With clear description, it provides a practical interpretation of the amended regulations – effective January 2012 – offers real solutions to the problems that can occur in practice.

This revised edition features:

  • new material on hot topics such as electromagnetic compatibility (EMC), harmonics, surge protective devices, and new special locations including medical locations, and operative or maintenance gangways;
  • highlights the changes that have been made in this latest Amendment and their impact in practice;
  • examples of how to comply with the Wiring Regulations;
  • fully-integrated colour including sixty brand new colour illustrations, twenty tables and new high-quality photographs.

This essential guide retains its handy format, ideal for practicing electricians, trainee electricians and apprentices to carry with them for quick reference. It is a valuable resource for all users of BS 7671 who want to understand the background to the Regulations; electrical engineers and technicians, installation and design engineers, consulting and building services engineers, also dedicated inspectors and testers.

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Table of Contents

Foreword by Giuliano Digilio xi

Preface xiii

Acknowledgements xv

Chapter A – BS 7671:2008 Amd No. 1:2011 Requirements for Electrical Installations – Introduction and Overview 1

A 1 Introduction to BS 7671:2008 1

A 2 Plan and layout of BS 7671:2008 2

A 3 Overview of major changes 5

A 4 Amendment No. 1:2011 9

Chapter B – Legal Relationship and General Requirements of BS 7671:2008 Amd No. 1:2011 11

B 1 Legal requirements and relationship 11

B 2 The role of Standards 17

B 3 Part 3 of BS 7671:2008 – assessment of general characteristics 18

Chapter C – Circuitry and Related Parts of BS 7671:2008 Amd No. 1:2011 21

C 1 Introduction 21

C 2 Design procedure overview 21

C 3 Load assessment 23

C 4 Circuitry design 26

C 5 Sub-mains 56

C 6 Discrimination co-ordination 58

C 7 Parallel cables 62

C 8 Harmonics 63

C 9 Standard final circuit designs 64

C 10 RCDs and circuitry 73

C 11 Ring and radial final circuits 75

Chapter D – Selection and Erection – Equipment 79

D 1 Introduction and fundamentals 79

D 2 Compliance with Standards 80

D 3 Identification of conductors – introduction 81

D 4 Protection against voltage and electromagnetic disturbance 86

D 5 Wiring systems 95

D 6 Circuit breakers 106

D 7 Residual current devices 111

D 8 Other equipment 116

D 9 Generating sets 121

D 10 Rotating machines 121

D 11 Plugs and socket-outlets 122

D 12 Electrode water heaters and electrode boilers 123

D 13 Heating conductors 124

D 14 Lighting and luminaires 124

D 15 Safety services 127

D 16 Ingress protection (IP), external infl uences 129

Chapter E – Earthing and Bonding 133

E 1 Introduction 133

E 2 Earthing arrangements 133

E 3 General requirements of earthing and bonding 138

E 4 Protective conductors 139

E 5 Armoured cables as protective conductors 147

E 6 Protective bonding 149

E 7 High earth leakage installations 158

Chapter F – Inspection Testing and Certification (Part 6) 161

F 1 Introduction 161

F 2 Visual inspection 162

F 3 Testing 164

F 4 Certification paperwork 183

Chapter G – Special Locations 201

G 1 Introduction purpose and principles 201

G 2 Locations containing a bath or shower (701) 203

G 3 Swimming pools and other basins (702) 208

G 4 Agricultural and horticultural premises (705) 214

G 5 Caravan parks and camping parks (708) 218

G 6 Medical locations (710) 222

G 7 Exhibitions, shows and stands (711) 227

G 8 Solar photovoltaic (PV) power supply systems (712) 229

G 9 Mobile or transportable units (717) 235

G 10 Floor and ceiling heating systems (753) 237

References 240

Appendices 243

Appendix 1 – Standards and bibliography 244

Appendix 2 – Popular cables: current rating tables from BS 7671:2008 Appendix 4 249

Appendix 3 – Limiting earth fault loop impedance tables from BS 7671:2008 252

Appendix 4 – Cable data resistance, impedance and ‘R1 + R2’ values 254

Appendix 5 – Fuse I2t characteristics 258

Index 259

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