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.

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