Practical Guide to Inspection Testing and Certification of Electrical Installations Conforms to

Practical guide to inspection, testing and certification of electrical installations......Page 4
Copyright page......Page 5
Contents......Page 6
Preface......Page 10
Foreword......Page 12
Acknowledgements......Page 14
Why inspect and test?......Page 16
Section 1. Design, Installation, Inspection and Testing......Page 17
Section 3. Information about other legislation......Page 18
Compliance with Building Regulations Part P......Page 19
Registered domestic installer......Page 20
DIY installer......Page 21
Summary......Page 22
Part P, Domestic Electrical Installation Certificate......Page 24
Certification required for the inspecting and testing of installations other than domestic......Page 25
Initial verification inspection......Page 26
Periodic inspection report......Page 28
Periodic inspection......Page 29
Periodic testing......Page 36
Voltage drop in conductors......Page 38
Safe isolation......Page 40
Isolation procedure......Page 43
Main equipotential bonding......Page 46
Continuity of supplementary bonding......Page 50
Method one......Page 55
Complete ring circuit......Page 57
Interconnections......Page 58
Performing the test......Page 60
Insulation resistance test......Page 66
Testing a whole installation......Page 67
Testing of individual circuits......Page 72
Testing of 3 phase installations......Page 74
Polarity tests......Page 77
Polarity test on a radial circuit such as a cooker or immersion heater circuit......Page 78
Polarity test on a lighting circuit......Page 79
Live polarity test......Page 82
Earth fault loop impedance tester......Page 85
Measurement using an earth electrode test instrument......Page 87
Earth fault loop impedance Z[sub(e)]......Page 88
Earth fault path for a TT system......Page 89
Earth fault path for a TNS system......Page 90
Earth fault path for a TNCS system......Page 91
Circuit earth fault loop impedance......Page 94
Method one......Page 97
Method two......Page 98
Prospective fault current test......Page 107
Types of RCD......Page 113
RCDs and supply systems......Page 116
Testing of RCDs......Page 118
Minor Electrical Installation Works Certificate......Page 124
Electrical Installation Certificate......Page 130
Schedule of Circuit Details and Test Results......Page 136
Schedule of Items Inspected......Page 142
Method of protection against electric shock......Page 145
Cables and conductors......Page 148
General......Page 149
Periodic Inspection Report......Page 151
Completing the form......Page 152
Overall assessment......Page 156
Means of earthing......Page 158
Main protective conductors......Page 159
Correct selection of protective devices......Page 164
Test equipment......Page 171
Instruments required......Page 172
Calibration of test instruments......Page 173
Electric shock......Page 175
Testing a 3 phase induction motor......Page 179
Appendix A. IP codes......Page 182
Appendix B. Exercises......Page 184
Appendix C. Questions......Page 190
Appendix D. Answers to Exercises......Page 196
Appendix E. Answers to Questions......Page 212
Appendix F. Useful information......Page 220
O......Page 224
Z......Page 225