PAT: Portable Appliance Testing, Second Edition: In-Service Inspection and Testing of Electrical Equipment

80 Pages·2008·0.92 MB·English

by  Brian Scaddan

PAT: Portable Appliance Testing
By the same author
Electrical Installation Work, ISBN 978-0-7506-8733-1
Electric Wiring: Domestic, ISBN 978-0-7506-8735-5
Wiring Systems and Fault Finding, ISBN 978-0-7506-8734-8
17th Edition IEE Wiring Regulations: Explained and Illustrated,
ISBN 978-0-7506-8720-1
17th Edition IEE Wiring Regulations: Design and Verification
of Electrical Installations, ISBN 978-0-7506-8721-8
17th Edition IEE Wiring Regulations: Inspection, Testing and
Certification, ISBN 978-0-7506-8719-5
PAT: Portable Appliance Testing
In-Service Inspection and Testing of
Electrical Equipment
Second edition
Brian Scaddan, IEng, MIET
AMSTERDAM • BOSTON • HEIDELBERG • LONDON •
NEW YORK • OXFORD • PARIS • SAN DIEGO •
SAN FRANCISCO • SINGAPORE • SYDNEY • TOKYO
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Newnes is an imprint of Elsevier
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First published 2000
Revised edition 2003
Second edition 2008
Copyright © 2008, Brian Scaddan. Published by Elsevier Ltd. All rights reserved
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asserted in accordance with the Copyright, Designs and Patents Act 1988
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No responsibility is assumed by the publisher for any injury and/or damage to
persons or property as a matter of products liability, negligence or otherwise, or
from any use or operation of any methods, products, instructions or ideas
contained in the material herein
British Library Cataloguing in Publication Data
Scaddan, Brian
PAT : portable appliance testing : in-service inspection
and testing of electrical equipment. – Rev. ed.
1. Electric apparatus and appliances – Testing 2. Electric
apparatus and appliances – Testing – Problems, exercises,
etc.
I. Title
621.3’1042’0287
Library of Congress Control Number: 2008926543
ISBN: 978-0-7506-8736-2
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Contents
PREFACE ............................................................................................. ix
CHAPTER 1 Legislation ........................................................................1
The Health and Safety at Work etc. Act 1974 ..........................................1
The Management of Health and Safety at
Work Regulations 1999 ......................................................................1
The Provision and Use of Work Equipment Regulations 1998 .................1
The Electricity at Work Regulations 1989 ............................................... 2
Prosecutions ..........................................................................................3
CHAPTER 2 Setting Up .........................................................................5
Equipment Register .............................................................................. 7
Combined Inspection and Testing Form ................................................ 7
Faulty Equipment and Repair Register ................................................ 1 0
CHAPTER 3 Equipment to be Inspected and Tested ............................11
Basic Protection ................................................................................. 11
Fault Protection ................................................................................... 11
Class 0 Equipment or Appliances .........................................................12
Class 01 Equipment or Appliances .......................................................12
Class I Equipment or Appliances .......................................................... 1 2
Class II Equipment or Appliances .........................................................13
Class III Equipment or Appliances ........................................................ 1 5
Equipment Types .................................................................................16
CHAPTER 4 Inspection .......................................................................19
User Checks ........................................................................................19
Formal Visual Inspection ...................................................................... 20
vii
viii Contents
CHAPTER 5 Combined Inspection and Testing .................................. 23
T esting ................................................................................................23
Preliminary Inspection ......................................................................... 23
APPENDIX 1 Shock Risk . ...................................................................35
E lectric Shock .................................................................................... 35
Basic Protection .................................................................................. 37
Fault Protection ................................................................................... 37
What Is Earth and Why and How We Connect to It? ..............................38
APPENDIX 2 Basic Electrical Theory Revision ....................................43
Electrical Quantities and Units ............................................................. 43
Relationship Between Voltage, Current and Resistance ........................44
Common Multiples of Units ..................................................................44
Resistance in Series ........................................................................... 44
Resistance in Parallel ..........................................................................45
APPENDIX 3 Sample 2377 Questions .................................................49
The Management of Electrical Equipment Maintenance .......................49
Inspection and Testing of Electrical Equipment ..................................... 5 9
APPENDIX 4 Answers to Sample 2377 Questions .............................. 67
The Management of Electrical Equipment Maintenance ...................... 67
Inspection and Testing of Electrical Equipment ................................... 67
INDEX ................................................................................................ 69
Preface
The introduction of The Electricity at Work Regulations (EAWR)
1989 prompted, among many other things, a rush to inspect and
test portable appliances. The Regulations do not require such
inspecting and testing, nor do they specifically mention portable
appliances. They do, however, require any electrical system to be
constructed, maintained and used in such a manner as to prevent
danger, and in consequence inspection and testing of systems (port-
able appliances are systems) is needed in order to determine if
maintenance is required.
All electrical equipment connected to the fixed wiring of an instal-
lation will need attention, not just portable appliances. I have how-
ever left the title of this book as PAT: Portable Appliance Testing as
such words are now indelibly imprinted on our minds, even though
it should read ‘Inspection and Testing of In-service Electrical
Equipment’.
The book is intended for those who need be involved in this
inspection and testing process, either as a business venture or as an
‘in-house’ procedure to conform with the EAWR. It is also a use-
ful reference document for anyone embarking on a City & Guilds
2377 course.
Brian Scaddan, April 2008
This new edition has been updated in line with the 17th Edition
Wiring Regulations and the 3rd edition of the Code of Practice for
In-Service Inspection and Testing of Electrical Equipment.
ix