IEC-60364-7-721-2007.pdf
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1、 INTERNATIONAL STANDARD IEC CEI NORME INTERNATIONALE 60364-7-721 First edition Premire dition 2007-04 Low-voltage electrical installations Part 7-721: Requirements for special installations or locations Electrical installations in caravans and motor caravans Installations lectriques basse tension Pa
2、rtie 7-721: Exigences pour les installations ou emplacements spciaux Installations lectriques dans les caravanes et caravanes moteur Reference number Numro de rfrence IEC/CEI 60364-7-721:2007 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2007 IEC, Geneva, Switzerland All rights reserved. Unless
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6、sirez obtenir des droits supplmentaires sur cette publication, utilisez les coordonnes ci-aprs ou contactez le Comit national de la CEI de votre pays de rsidence. IEC Central Office 3, rue de Varemb CH-1211 Geneva 20 Switzerland Email: inmailiec.ch Web: www.iec.ch About the IEC The International Ele
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15、 NORME INTERNATIONALE 60364-7-721 First edition Premire dition 2007-04 Low-voltage electrical installations Part 7-721: Requirements for special installations or locations Electrical installations in caravans and motor caravans Installations lectriques basse tension Partie 7-721: Exigences pour les
16、installations ou emplacements spciaux Installations lectriques dans les caravanes et caravanes moteur For price, see current catalogue Pour prix, voir catalogue en vigueur PRICE CODE CODE PRIX U Commission Electrotechnique Internationale International Electrotechnical Commission -,-,- 2 60364-7-721
17、IEC:2007 CONTENTS FOREWORD.3 INTRODUCTION.5 721 Electrical installations in caravans and motor caravans6 721.1 Scope 6 721.2 Normative references.6 721.3 Terms and definitions 8 721.31 Purposes, supplies and structure .8 721.313 Supplies 8 721.4 Protection for safety.8 721.41 Protection against elec
18、tric shock8 721.413 Protective measure: electrical separation.9 721.414 Protective measure: extra-low voltage provided by SELV and PELV 9 721.43 Protection against overcurrent .9 721.5 Selection and erection of equipment 10 721.51 Common rules .10 721.510 Introduction10 721.512 Operational condition
19、s and external influences 10 721.514 Identification10 721.521 Types of wiring systems.10 721.522 Selection and erection of wiring systems in relation to external influences 11 721.524 Cross-sectional areas of conductors 11 721.526 Electrical connections11 721.528 Proximity of wiring systems to other
20、 services .11 721.53 Isolation, switching and control 11 721.536 Isolation and switching.11 721.543 Protective conductors 12 721.55 Other equipment12 Annex A (normative) Instructions for electricity supply .14 Annex B (informative) Extra low-voltage d.c. installations 15 Annex C (informative) Curren
21、t-carrying capacities .22 Annex D (informative) List of notes concerning certain countries .25 Bibliography26 Figure C.1 Graph for obtaining minimum cross-sectional area for conductors for fixed wiring installations with a voltage drop of 0,8 V 22 Figure C.2 Graph for obtaining minimum cross-section
22、al area for conductors for battery cable installations with a voltage drop of 0,3 V23 Table 721A Cross-sectional areas of flexible cords and cables for caravan connection 13 Table B.721.1 Functional allocation and cross-sectional areas of cores for caravan connectors18 -,-,- 60364-7-721 IEC:2007 3 I
23、NTERNATIONAL ELECTROTECHNICAL COMMISSION _ LOW-VOLTAGE ELECTRICAL INSTALLATIONS Part 7-721: Requirements for special installations or locations Electrical installations in caravans and motor caravans FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for stan
24、dardization 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 addition to other activities, IEC publishes In
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