17th-wiring-regulations.pdf
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1、 17th Edition IEE Wiring Regulations: Design and Verification of Electrical Installations By the same author 17th Edition IEE Wiring Regulations: Inspection, Testing and Certification, ISBN 978-0-7506-8719-5 17th Edition IEE Wiring Regulations: Explained and Illustrated, ISBN 978-0-7506-8720-1 Elect
2、ric Wiring: Domestic, ISBN 978-0-7506-8735-5 PAT: Portable Appliance Testing, ISBN 978-0-7506-8736-2 Wiring Systems and Fault Finding, ISBN 978-0-7506-8734-8 Electrical Installation Work, ISBN 978-0-7506-8733-1 17th Edition IEE Wiring Regulations: Design and Verification of Electrical Installations
3、Sixth edition Brian Scaddan , IEng, MIET AMSTERDAM BOSTON HEIDELBERG LONDON NEW YORK OXFORD PARIS SAN DIEGO SAN FRANCISCO SINGAPORE SYDNEY TOKYO Newnes is an imprint of Elsevier Newnes is an imprint of Elsevier Linacre House, Jordan Hill, Oxford OX2 8DP , UK 30 Corporate Drive, Suite 400, Burlington
4、, MA 01803, USA First published 1995 Reprinted 1996, 1999 Second edition 1999 Third edition 2001 Fourth edition 2002 Reprinted 2002, 2003, 2004 Fifth edition 2005 Sixth edition 2008 Copyright 2008, Brian Scaddan. Published by Elsevier Ltd. All rights reserved The right of Brian Scaddan to be identif
5、ied as the author of this work has been asserted in accordance with the Copyright, Designs and Patents Act 1988 No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means electronic, mechanical, photocopying, recording or otherwise without
6、the prior written permission of the publisher Permissions may be sought directly from Elseviers Science fax ( ? 44) (0) 1865 853333; email: . Alternatively you can submit your request online by visiting the Elsevier website at http:/ , and selecting Obtaining permission to use Elsevier material Noti
7、ce 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 i
8、n Publication Data Scaddan, Brian 17th edition IEE wiring regulations : design and verification of electrical installations. 6th ed. 1. Electric wiring, Interior safety regulations Great Britain 2. Electric wiring, Interior Handbooks, manuals, etc. I. Title II. Scaddan, Brian. 16th edition IEE wirin
9、g regulations III. Institution of Electrical Engineers IV. Seventeenth edition IEE wiring regulations 621.319240941 Library of Congress Control Number: 2008926538 ISBN: 978-0-7506-8721-8 For information on all Newnes publications visit our website at Typeset by Charon Tec Ltd., A Macmillan Company.
10、 () Printed and bound in Slovenia 08 09 10 11 11 10 9 8 7 6 5 4 3 2 1 In memory of Ted Stocks A friend and colleague This page intentionally left blank 17th Edition IEE Wiring Regulationsvii Contents PREFACE . ix CHAPTER 1Design 1 Assessment of General Characteristics 1 Protection for Safety 6 Prote
11、ction Against Electric Shock .7 Protection Against Thermal Effects (IEE Regulations Chapter 42) .15 Protection Against Overcurrent 16 Protection Against Overload .18 Protection Against Fault Current 19 Protection Against Undervoltage (IEE Regulations Section 445) .23 Protection Against Overvoltage (
12、IEE Regulations Sections 442 and 443) .23 Isolation and Switching 23 Design Calculations .25 CHAPTER 2 Inspection and Testing 53 Initial Verification .53 Inspection .54 Testing 54 Approved Test Lamps and Indicators .55 Calibration, Zeroing/Nulling and Care of Instruments .57 The Tests 58 Continuity
13、of Protective Conductors .59 Continuity of Ring Final Circuit Conductors 61 Insulation Resistance 70 Polarity .72 Ring Final Circuits .72 Radial Circuits .73 Earth Electrode Resistance 73 External Loop Impedance Z e 77 Earth Fault Loop Impedance Z s .78 Additional Protection .78 vii viii CHAPTER 3 S
14、pecial Locations IEE Regulations Part 7 .85 Introduction 85 BS 7671 Section 701: Bathrooms, etc. . .86 BS 7671 Section 702: Swimming Pools .89 BS 7671 Section 703: Hot Air Saunas .92 BS 7671 Section 704: Construction Sites .93 BS 7671 Section 705: Agricultural and Horticultural Locations .95 BS 7671
15、 Section 706: Restrictive Conductive Locations .97 BS 7671 Section 708: Caravan and Camping Parks .97 BS 7671 Section 709: Marinas 99 BS 7671 Section 711: Exhibitions, Shows and Stands 100 BS 7671 Section 712: Solar Photovoltaic (PV) Supply Systems 101 BS 7671 Section 717: Mobile or Transportable Un
16、its .102 BS 7671 Section 721: Caravans and Motor Caravans 102 BS 7671 Section 740: Amusement Devices, Fairgrounds, Circuses, etc. 104 BS 7671 Section 753: Floor and Ceiling Heating Systems 104 APPENDIX 1 BS 7671 Appendices 107 APPENDIX 2 Sample Questions .109 APPENDIX 3Suggested Solutions to Sample
17、Questions 115 INDEX .123 Contents ix Preface There are many electrical operatives who, quite innocently I am sure, select wiring systems based on the old adage of thats the way its always been done or we always use that size of cable for that circuit etc. Unfortunately this approach, except for a fe
18、w standard circuits, is quite wrong. Each wiring system should be designed to be fit for purpose and involves more than arbitrary choices. The intention of this book is to illustrate the correct procedure for basic design of installations from initial assessment to final com- missioning. It will als
19、o be of use to candidates studying for a C the operation of residual current devices (RCDs) may be impaired by the magnetic fields of other equipment; computers, PLCs, etc. may be affected by normal earth leakage currents from other circuits. Maintainability The Electricity at Work Regulations 1989
20、require every system to be maintained such as to prevent danger; consequently, all installa- tions require maintaining, some more than others, and due account of the frequency and quality of maintenance must be taken at the design stage. It is usually the industrial installations that are mostly aff
21、ected by the need for regular maintenance, and hence, consult- ation with those responsible for the work is essential in order to Table 1.1 Examples of Classifications of External Influences. EnvironmentUtilizationBuilding Water CapabilityMaterials AD6 Waves BA3 Handicapped CA1 Non-combustible IEE W
22、iring Regulations: Design and Verification4 ensure that all testing, maintenance and repair can be effectively and safely carried out. The following example may serve to illus- trate an approach to consideration of design criteria with regard to a change of usage. Example 1.1 A vacant two-storey lig
23、ht industrial workshop, 12 years old, is to be taken over and used as a Scout/Guide HQ. New shower facilities are to be provided. The supply is three-phase 400/230 V and the earthing system is TN-S. The existing electrical installation on both floors comprises steel trunking at a height of 2.5 m aro
24、und all perimeter walls, with steel conduit, to all socket outlets and switches (metal-clad), to numerous isolators and switch-fuses once used to control single- and three-phase machinery, and to the lighting which comprises fluorescent luminaires suspended by chains from the ceilings. The ground fl
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