Table Of ContentInspection,
testing and
commissioning
●
Malcolm Doughton and
John Hooper
Australia • Brazil • Japan • Korea • Mexico • Singapore • Spain • United Kingdom • United States
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Dedication
●
This series of studybooks is dedicated to the memory of Ted Stocks whose original
concept, and his publication of the first open learning material specifically for electrical
installation courses, forms the basis for these publications. His contribution to training
has been an inspiration and formed a solid base for many electricians practising their
craft today.
iii
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deemed that any suppressed content does not materially affect the overall learning experience. Cengage Learning reserves the right to remove additional content at any time if subsequent rights restrictions require it.
The Electrical
Installation Series
●
Legislation: Health and Organizing and Managing Principles of Design Installation
Safety & Environmental the Work Environment and Maintenance
Installing Wiring Systems Planning and Selection for Termination and Connection
Electrical Systems of Conductors
Fault Finding and Diagnosis Maintaining Electrotechnical
Systems
iv
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deemed that any suppressed content does not materially affect the overall learning experience. Cengage Learning reserves the right to remove additional content at any time if subsequent rights restrictions require it.
Contents
●
About the authors vi Part 2 Testing the continuity of protective
Acknowledgements vii conductors 62
Study guide viii Part 3 Testing continuity of ring final circuit
conductors 70
Unit Six Inspection, testing and Part 4 Testing insulation resistance 76
Part 5 Electrical separation, barriers and
commissioning
enclosures 83
Part 6 Polarity 86
1 Principles and regulatory Part 7 Earth electrode resistance 88
requirements for safe
5 Testing and commissioning an
isolation 2
installation (Part 2) 95
Part 1 The Electricity at Work Regulations 3
Part 2 The need for safe isolation 5 Part 1 Supply polarity and earth electrode
Part 3 Safe isolation procedures 8 testing 97
Part 4 Health and safety requirements 14 Part 2 Earth fault loop impedance
testing 101
2 Principles and regulatory Part 3 Prospective fault current testing 108
Part 4 Testing RCDs 111
requirements for inspecting,
Part 5 Phase sequence, functional testing
testing and commissioning 18
and voltage drop 117
Part 1 Purpose of inspection and testing 19 Part6Documentation andclientliaison 121
Part 2 Documentation 23
Part 3 Information required 26 6 Certificates and
documentation 126
3 Inspecting electrical
Part 1 Forms of certification 128
installations 33
Part 2 Information recorded on forms of
Part 1 Requirements of inspection 35 certification 133
Part 2 Carrying out the inspection 37 Part 3 The certification process 146
Part 3 Specific inspection items 40
Appendix 1: Certificates 152
Part 4 General inspection items 46
End test 163
Progress check 52
Answer section 169
Glossary 177
4 Testing and commissioning an
Index 178
installation (Part 1) 55
Part 1 General requirements for testing 57
v
Copyright 2012 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and/or eChapter(s). Editorial review has
deemed that any suppressed content does not materially affect the overall learning experience. Cengage Learning reserves the right to remove additional content at any time if subsequent rights restrictions require it.
About the authors
●
Malcolm Doughton John Hooper
Malcolm Doughton, I.Eng, MIET, LCG, has ex- John Hooper spent many years teaching a
perience in all aspects of electrical contracting diverse range of electrical and electronic subjects
and has provided training to heavy current from craft level up to foundation degree level.
electrical engineering to HNC level. He currently Subjects taught include: Electrical Technology,
provides training on all aspects of electrical in- Engineering Maths, Instrumentation, P.L.C.s,
stallations, inspection, testing, and certification, Digital, Power and Microelectronic Systems.
health and safety, PAT and solar photovoltaic John has also taught various electrical engineer-
installations. In addition, Malcolm provides nu- ing subjects at both Toyota and JCB. Prior to
merous technical articles and is currently man- lecturing in further and higher education he
aging director of an electrical consultancy and had a varied career in both electrical engineering
training company. and electrical installations.
vi
Copyright 2012 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and/or eChapter(s). Editorial review has
deemed that any suppressed content does not materially affect the overall learning experience. Cengage Learning reserves the right to remove additional content at any time if subsequent rights restrictions require it.
Acknowledgements
●
The authors and publisher would like to thank Chris Cox and Charles Duncan for their considerable
contribution in bringing this series of studybooks to publication. We extend our grateful thanks for
their unstinting patience and support throughout this process.
The authors and publisher would also like to thank the following for providing pictures for the book:
Brady Corporation
HSE
Ideal Industries Ltd.
IET
Kewtech
Martindale
MK Electric
Olimat
A special thank you to the ECA for providing the examples of Electrical Certificates and to Megger for
supplying equipment for images in this book.
Every effort has been made to contact the copyright holders.
This book is endorsed by:
Founded in 1901, the Electrical Contractors’ Association (ECA) is the UK’s leading trade association
representing the interests of contractors who design, install, inspect, test and maintain electrical
and electronic equipment and services.
www.eca.co.uk
vii
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deemed that any suppressed content does not materially affect the overall learning experience. Cengage Learning reserves the right to remove additional content at any time if subsequent rights restrictions require it.
Study guide
●
Thisstudybookhasbeenwrittenandcompiledtohelpyougainthemaximumbenefitfromthematerial
containedinit.Youwillfindprompts forvariousactivities allthe waythroughthestudybook.Theseare
designedtohelpyouensureyouhaveunderstoodthesubjectandkeepyouinvolvedwiththematerial.
Where you see ‘Sid’ as you work through the studybook, he is there to help you, and the activity ‘Sid’ is
undertaking will indicate what it is you are expected to do next.
Task
Familiarize yourself with the requirements of BS 7671, Section 526 Electrical Connections before you continue
with this chapter.
Task A‘Task’is anactivity thatmay take youaway from the book todofurther research either from other materialor tocomplete a
practicaltask. For these tasks youare given theopportunity toask colleagues atwork oryour tutor atcollege questions aboutpracti-
cal aspects of the subject. There are also tasks where you may be required to use manufacturers’ catalogues to look up your answer.
Theseareallimportantandwillhelpyourunderstandingofthesubject.
Try this
List five factors that must be considered before carrying out an insulation resistance test.
1 __________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
2 __________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
3 __________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
4 __________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
5 __________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Trythis A‘Trythis’isanopportunityforyoutocompleteanexercisebasedonwhatyouhavejustread,ortocompleteamathematical
problembasedononethathasbeenshownasanexample.
viii
Copyright 2012 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and/or eChapter(s). Editorial review has
deemed that any suppressed content does not materially affect the overall learning experience. Cengage Learning reserves the right to remove additional content at any time if subsequent rights restrictions require it.
