1、 IEC 60364-7-704 Edition 3.0 2017-03 INTERNATIONAL STANDARD Low v oltage electrical installations Part 7-704:Requirements for special installations or locations Construction and demolition site installations IEC 60364-7-704:2017-03(en)THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2017 IEC,Geneva
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8、by email.Electropedia-www.electropedia.org The w or lds leading online dictionary of electronic and electrical terms containing 20 000 terms and definitions in English and Fr ench,w ith equiv alent ter ms in 16 additional languages.Also k nown as the Inter national Electr otechnical Vocabulary(IEV)o
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11、r special installations or locations Construction and demolition site installations INT ERNAT IONAL ELECT ROT ECHNICAL COMMISSION ICS 29.020;91.140.50 ISBN 978-2-8322-4020-5 Registered t rademark of the Internat ional Electrotechnica l Commission Warning!Mak e sure that you obtained this publication
12、 from an authorized distributor.2 IEC 60364-7-704:2017 IEC 2017 CONTENTS FOREWORD.3 INTRODUCTION.5 704 Construction and demolition site installations.6 704.1 Scope.6 704.2 Normative references.6 704.3 Terms and definitions.7 704.30 Assessment of general characteristics.7 704.31 Purposes,supplies and
13、 structure.7 704.313 Supplies.7 704.4 Protection for safety.7 704.41 Protection against electric shock.7 704.410 Introduction.7 704.411 Protective measure:automatic disconnection of supply.8 704.414 Protective measure:Extra-low voltage provided by SELV and PELV.8 704.44 Protection against voltage di
14、sturbances and electromagnetic disturbances.8 704.443 Protection against transient overvoltages of atmospheric origin or due to switching.8 704.5 Selection and erection of equipment.8 704.51 Common rules.8 704.511 Compliance with standards.8 704.512 Operational conditions and external influences.9 7
15、04.52 Wiring systems.9 704.53 Isolation,switching and control.9 704.536 Isolation and switching.9 704.56 Safety services.10 704.6 Verification.10 Annex A(informative)List of notes concerning certain countries.11 Bibliography.15 IEC 60364-7-704:2017 IEC 2017 3 INTERNATIONAL ELECTROTECHNICAL COMMISSIO
16、N _ LOW VOLTAGE ELECTRICAL INSTALLATIONS Part 7-704:Requirements for special installations or locations Construction and demolition site installations FOREWORD 1)The International Electrotechnical Commission(IEC)is a worldwide organization for standardization comprising all national electrotechnical committees(IEC National Committees).The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields.To this end and in a
