1、 IEC 60702-3 Edition 1.0 2016-04 INTERNATIONAL STANDARD NORME INTERNATIONALE Mineral insulated cables and their terminations with a rated voltage not exceeding 750 V Part 3: Guidance for use Cbles isolant minral et leurs terminaisons de tension assigne ne dpassant pas 750 V Partie 3: Guide dutilisat
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19、s dsirez nous donner des commentaires sur cette publication ou si vous avez des questions contactez-nous: csciec.ch. IEC 60702-3 Edition 1.0 2016-04 INTERNATIONAL STANDARD NORME INTERNATIONALE Mineral insulated cables and their terminations with a rated voltage not exceeding 750 V Part 3: Guidance f
20、or use Cbles isolant minral et leurs terminaisons de tension assigne ne dpassant pas 750 V Partie 3: Guide dutilisation INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE ICS 29.060.20 ISBN 978-2-8322-3324-5 Registered trademark of the International Electrotechnical
21、 Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. 2 IEC 60702-3:2016 IEC 2016 CONTENTS FOREWO
22、RD . 3 1 Scope 5 2 Normative references. 5 3 Terms and definitions 5 4 Safety . 5 4.1 Fundamental considerations 5 4.2 General . 5 4.3 Support and fixing . 7 5 Limiting conditions . 7 5.1 General . 7 5.2 Voltage . 7 5.3 Current carrying capacity . 7 5.4 Thermal effects . 8 5.5 Mechanical stress . 9
23、5.5.1 General . 9 5.5.2 Tension . 9 5.5.3 Bending . 9 5.5.4 Compression 9 5.6 Compatibility . 9 5.7 Dynamic stresses 10 5.8 Flexing 10 5.9 Corrosion protection and direct burial 10 6 Installation . 10 7 Initial and periodic verification 10 8 Packaging, storage and handling/transportation . 11 8.1 Pa
24、ckaging . 11 8.2 Storage/transportation . 11 8.3 Handling . 11 Bibliography . 12 Table 1 Limiting temperature conditions . 6 Table 2 Recommended fixing distances 7 IEC 60702-3:2016 IEC 2016 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ MINERAL INSULATED CABLES AND THEIR TERMINATIONS WITH A RATED VOL
25、TAGE NOT EXCEEDING 750 V Part 3: Guidance for use 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
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35、 publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60702-3 has been prepared by IEC technical committ
36、ee 20: Electric cables. This first edition of IEC 60702-3 is based on CENELEC HD 586.3. The text of this standard is based on the following documents: FDIS Report on voting 20/1618/FDIS 20/1623/RVD Full information on the voting for the approval of this standard can be found in the report on voting
37、indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. 4 IEC 60702-3:2016 IEC 2016 A list of all parts in the IEC 60702 series, published under the general title Mineral insulated cables and their terminations with a rated voltage not excee
38、ding 750 V, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC website under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will b
39、e reconfirmed, withdrawn, replaced by a revised edition, or amended. IEC 60702-3:2016 IEC 2016 5 MINERAL INSULATED CABLES AND THEIR TERMINATIONS WITH A RATED VOLTAGE NOT EXCEEDING 750 V Part 3: Guidance for use 1 Scope This part of IEC 60702 provides guidance for the safe use of mineral insulated ca
40、bles and their terminations with a rated voltage not exceeding 750 V which are specified in IEC 60702- 1 and IEC 60702-2. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references,
41、only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60364-1, Low-voltage electrical installations Part 1: Fundamental principles, assessment of general characteristics, definitions 3 Terms and definitions For t
42、he purposes of this document, the terms and definitions given in IEC 60364-1 apply. 4 Safety 4.1 Fundamental considerations 4.1.1 Safety of a cable means that the product does not present an unacceptable risk of danger to life or property whilst being used in its intended manner. 4.1.2 Unless otherw
43、ise stated, cables shall not be used for any other purpose than the transmission and distribution of electricity. 4.1.3 The test methods, test parameters and requirements described in IEC 60702-1 and IEC 60702-2 are only provided for the purpose of checking design with respect to safety and quality
44、assurance. They shall not be regarded as providing guidance as to whether the cables are suitable for service under conditions equivalent to the test conditions. 4.2 General 4.2.1 All conductors and cables shall be selected so as to be suitable for the voltages and currents likely to occur under all
45、 conditions which are or shall have been anticipated in the equipment or installation in which they are used. 4.2.2 Cables shall be constructed, installed, protected, used and maintained so as to prevent danger so far as it is reasonably practical. 4.2.3 The limiting temperature conditions under whi
46、ch mineral insulated cables and terminations can reasonably be expected to operate safely under normal circumstances are given in Table 1. 6 IEC 60702-3:2016 IEC 2016 These conditions are those which are considered capable of ensuring a reasonable length of life in service. It has been accepted as r
47、easonable by experience and use of the cable and terminations in the particular installations. Table 1 Limiting temperature conditions Temperature condition Limit value Maximum continuous sheath operating temperature, exposed to touch or in contact with combustible material: bare copper sheath 70 C
48、covered copper sheath 70 C Maximum continuous sheath operating temperature, not exposed to touch, and not in contact with combustible material: bare copper sheath and 105 C seals 105 C bare copper sheath and 250 C seals 250 C Maximum conductor temperature under fault conditions, exposed to touch or
49、in contact with combustible material: bare or covered sheath 160 C aMaximum conductor temperature under fault conditions, not exposed to touch, and not in contact with combustible material bare copper sheath 250 C aMinimum installation temperature: bare copper sheath bcovered copper sheath cMinimum continuous operating temperature bare copper sheath bcovered copper sheath caSeals shall be suitable for this temperat