Student's Guide to the IET Wiring Regulations BS 7671:2018+A2:2022 3rd Edition 2022 (PDF)

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About the book:

Publisher: IET
Place of Publication: United Kingdom
Pages: 305
Edition: 2022
Language: English
Size: 90 Mb

Complies with BS7671:2018+A2:2022.

Content:

List of Figures 7
List of Tables 11
Acknowledgements 1 3
Welcome 15
What is the right route for you? 15
What will you get from this Guide? 20
The road ahead 20
Section 1 The IET Wiring Regulations 23
1.1 The IET Wiring Regulations 23
1.2 Who is responsible for writing the
lET Wiring Regulations? 24
1.3 IET standards and compliance staff 26
1.4 Symbols and SI units 33
1.5 Vocabulary: terms, acronyms and abbreviations 34
1.6 Policies and legal requirements 45
1 .7 Guidance on predetermined values in the
IET Wiring Regulations 46
Section 2 Health and Safety 51
2.1 Introduction 51
2.2 Risk assessments and method statements 52
2.3 Safe isolation procedure 60
2.4 Tool safety 63
Section 3 Generation and Transmission 71
3.1 What is used to generate electricity? 71
3.2 What are the characteristics of the electricity generated in the UK? 73
3.3 How is electricity transmitted? 74
3.4 How do we measure what we use? 77
Section 4 Supply 81
4.1 Supply intake arrangements 81
4.2 Live conductors 81
4.3 Current 82
4.4 Earthing arrangement 84
4.5 Responsibility 87
4.6 Tails 88
4.7 The consumer unit 89
Section 5 Protection and Isolation 95
5.1 Protective devices 95
5.2 Selecting protective devices 109
5.3 Selectivity 111
5.4 Integration of devices and components 114
5.5 Isolation and switching (Chapter 53 of the IET Wiring Regulations) 114
5.6 Isolators and switches (Chapter 46 of the IET Wiring Regulations) 115
5.7 Isolation 116
5.8 Switching off for mechanical maintenance 118
5.9 Emergency switching off 119
5.10 Functional switching 119
5.11 Undervoltage protection 120
Section 6 Earthing and Bonding 123
6.1 What is earthing and why do we need it? 123
6.2 Protective equipotential bonding 130
6.3 Supplementary equipotential bonding 135
Section 7 Cable Calculations 139
7.1 Why do we need cable calculations? 139
7.2 Current rating of equipment and protective devices and current-carrying capacity of cables 140
7.3 How design current, protective device rating and current-carrying capacity relate to each other 145
7.4 Voltage drop 151
Section 8 Final Circuits 157
8.1 General installation practices 157
8.2 Designing and installing a new circuit 158
8.3 Luminaires and lighting installations 165
8.4 Radial final circuits (power) 177
8.5 Ring final circuits 179
8.6 Spurs 182
8.7 Shower circuit 184
8.8 Separated extra-low voltage systems (SELV) 185
8.9 Protective extra-low voltage systems (PELV) 186
8.10 Functional extra-low voltage systems (FELV) 188
Section 9 Inspection and Testing 191
9.1 Why inspect and test? 191
9.2 Initial inspection 193
9.3 The tests in detail 195
9.4 Dead tests 197
9.5 Live tests 213
Section 10 Fault Finding 219
10.1 What is a fault? 219
10.2 How to diagnose and locate a fault 222
Section 1 1 Common Calculations 235
11.1 Simple transposition 235
11.2 Triangle method: voltage, current, resistance and power 237
11.3 Resistors 238
Section 12 Diversity 243
12.1 What is diversity? 243
12.2 Calculating diversity 244
12.3 Diversity for ring final circuits 246
Section 13 Prosumer’s Electrical Installations 251
13.1 Prosumer’s installations 251
13.2 Types of prosumer's electrical installations 253
13.3 Operating modes 253
Appendix A Special installations or locations 257
Appendix B Tables of symbols 271
Appendix C Degrees of protection provided by enclosures (IP code) 281
Answers 283
Section 1 The IET Wiring Regulations 283
Section 2 Health and Safety 284
Section 3 Generation and Transmission 284
Section 4 Supply 285
Section 5 Protection and Isolation 285
Section 6 Earthing and Bonding 286
Section 7 Cable Calculations 287
Section 8 Final Circuits 289
Section 9 Inspection and Testing 290
Section 10 Fault Finding 290
Section 11 Common Calculations 291
Section 12 Diversity 291
Section 13 Prosumer’s Electrical Installations 293
Index 295

Tags: Students Guide bs7671-2022 iet pdf, Students Guide BS 7671:2018+A2:2022, Students Guide Wiring Regulations 2022