1、 IEC 60423Edition 3.0 2007-08INTERNATIONAL STANDARD NORME INTERNATIONALEConduit systems for cable management Outside diameters of conduits for electrical installations and threads for conduits and fittings Systmes de conduits pour la gestion du cblage Diamtres extrieurs des conduits pour installatio
2、ns lectriques et filetages pour conduits et accessoires IEC60423:2007THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2007 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or m
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16、ication ou si vous avez des questions, visitez le FAQ du Service clients ou contactez-nous: Email: csciec.ch Tl.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC 60423Edition 3.0 2007-08INTERNATIONAL STANDARD NORME INTERNATIONALEConduit systems for cable management Outside diameters of conduits for elect
17、rical installations and threads for conduits and fittings Systmes de conduits pour la gestion du cblage Diamtres extrieurs des conduits pour installations lectriques et filetages pour conduits et accessoiresINTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE MICS 29.
18、120.10 PRICE CODECODE PRIXISBN 2-8318-9268-6 2 60423 IEC:2007 CONTENTS FOREWORD.3 INTRODUCTION.5 1 Scope.6 2 Normative references6 3 Outside diameters and threads .6 4 Gauges.6 5 Samples of conduit .7 Bibliography13 Figure 1 Basic profile of screw threads .9 Figure 2 Gauges for checking maximum outs
19、ide diameters of threadable conduits10 Figure 3a Gauges for checking minimum outside diameters of rigid metallic threadable conduits.11 Figure 3b Gauges for checking minimum outside diameters of threadable conduits other than rigid metallic .12 Figure 3 Gauges for checking minimum outside diameters
20、of threadable conduits.12 Table 1 Outside diameters for threadable conduits and thread details for conduits and associated fittings .8 Table 2 Outside diameters for non-threadable conduit 9 60423 IEC:2007 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ CONDUIT SYSTEMS FOR CABLE MANAGEMENT OUTSIDE DIAM
21、ETERS OF CONDUITS FOR ELECTRICAL INSTALLATIONS AND THREADS FOR CONDUITS AND FITTINGS 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
22、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 International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Gui
23、des (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC
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28、ndicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents includ
29、ing individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or relian
30、ce upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the ele
31、ments 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 60423 has been prepared by subcommittee 23A: Cable management systems, of IEC technical committee 23: Electrical accessories.
32、 This third edition cancels and replaces the second edition published in 1993. This edition constitutes a technical revision. The following main changes have been made to the second edition: revised figures and tables plus editorial and normative reference updates; conduit range increased to 110 mm
33、outside diameter. The text of this standard is based on the following documents: FDIS RVD 23A/541/FDIS 23A/545/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. 4 60423 IEC:2007 This publication has been drafted in
34、 accordance with the ISO/IEC Directives, Part 2. The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publ
35、ication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. 60423 IEC:2007 5 INTRODUCTION The mechanical performance of the threadable parts of the conduit system will be a function of material and wall thickness, which is specified in the appropriate product standard (IEC 613
36、86 series). 6 60423 IEC:2007 CONDUIT SYSTEMS FOR CABLE MANAGEMENT OUTSIDE DIAMETERS OF CONDUITS FOR ELECTRICAL INSTALLATIONS AND THREADS FOR CONDUITS AND FITTINGS 1 Scope This International Standard specifies outside diameters for conduits used in electrical installations or in communication systems
37、 and the dimensional requirements for threads. It also specifies the dimensional requirements for threads used in associated fittings. It is not applicable to extra heavy-duty electrical rigid steel conduits specified in IEC 60981. 2 Normative references The following referenced documents are indisp
38、ensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 68-1:1998, ISO general purpose screw threads Basic profile Part 1: Metric screw threads IS
39、O 965-1:1998, ISO general-purpose metric threads Tolerances Part 1: Principles and basic data ISO 1502:1996, ISO general-purpose metric screw threads Gauges and gauging 3 Outside diameters and threads The outside diameters, tolerances and details of threadable conduit and external and internal metri
40、c threads are given in Table 1. Details of the thread form are given in Figure 1, which is based on ISO 68-1 and ISO 965-1. Outside diameters and tolerances of non-threadable conduit are given in Table 2. 4 Gauges External threads are checked by means of threaded GO ring gauges and plain NO-GO ring
41、gauges specified in ISO 1502. Internal threads are checked by means of threaded GO plug gauges and plain NO-GO plug gauges specified in ISO 1502. Outside diameters of threadable conduits are checked by means of GO ring gauges specified in Figure 2 and NO-GO gap gauges specified in Figure 3a for thre
42、adable rigid metal conduits, or NO-GO ring gauges specified in Figure 3b for threadable conduits other than rigid metal. 60423 IEC:2007 7 Outside diameters of non-threadable conduits may be checked by any suitable measuring technique. 5 Samples of conduit The samples shall be (500 5) mm in length. 8
43、 60423 IEC:2007 Table 1 Outside diameters for threadable conduits and thread details for conduits and associated fittings DimensionsinmillimetresOutside diameters and thread for conduitsExternal threads Internal threads Major diameter (d) Effective diameter (d2) Minor diameter (d1) Majordiameter (D)
44、 Effective diameter (D2) Minor diameter (D1) Outside diameters Metricthreads Class of fit Pitch max. min. max. min. max. min. min. max. min. max. min. 6 0/0,1 M6 0,756 g/6H 0,75 5,978 5,838 5,491 5,391 5,058 4,929 6,000 5,645 5,513 5,3785,188 8 0/0,2 M8 1 8 g/7H 1,00 7,974 7,694 7,324 7,144 6,747 6,
45、528 8,000 7,540 7,350 7,2176,917 10 0/0,2 M10 1 8 g/7H 1,00 9,974 9,694 9,324 9,144 8,747 8,528 10,000 9,540 9,350 9,2178,917 12 0/0,3 M12 1,58 g/7H 1,50 11,968 11,593 10,994 10,770 10,128 9,846 12,000 11,262 11,026 10,75110,376 16 0/0,3 M16 1,58 g/7H 1,50 15,968 15,593 14,994 14,770 14,128 13,846 1
46、6,000 15,262 15,026 14,75114,376 20 0/0,3 M20 1,58 g/7H 1,50 19,968 19,593 18,994 18,770 18,128 17,846 20,000 19,262 19,026 18,75118,376 25 0/0,4 M25 1,58 g/7H 1,50 24,968 24,593 23,994 23,758 23,128 22,834 25,000 24,276 24,026 23,75123,376 32 0/0,4 M32 1,58 g/7H 1,50 31,968 31,593 30,994 30,758 30,
47、128 29,834 32,000 31,276 31,026 30,75130,376 40 0/0,4 M40 1,58 g/7H 1,50 39,968 39,593 38,994 38,758 38,128 37,834 40,000 39,276 39,026 38,75138,376 50 0/0,4 M50 1,58 g/7H 1,50 49,968 49,593 48,994 48,744 48,128 47,820 50,000 49,291 49,026 46,75148,376 63 0/0,4 M63 1,58 g/7H 1,50 62,968 62,593 61,99
48、4 61,744 61,128 60,820 63,000 62,291 62,026 61,75161,376 75 0/0,4 M75 1,58 g/7H 1,50 74,698 74,593 73,994 73,744 73,128 72,820 75,000 74,291 74,026 73,75173,376 90 0/-0,5 M90 2 8 g/7H 2,00 89,962 89,512 88,663 88,383 87,508 87,151 90,000 89,001 88,701 88,31087,835 110 0/0,5 M110 2 8 g/7H 2,00 109,96
49、2 109,512 108,663 108,383 107,508 107,151 110,000 109,001 108,701 108,310107,835 NOTESee Figure 1 for details.60423 IEC:2007 9 Table 2 Outside diameters for non-threadable conduit Outside diameters mm Tolerance mm 6 +0,0 0,1 8 +0,0 0,2 10 +0,0 0,2 12 +0,0 0,3 16 +0,0 0,3 20 +0,0 0,3 25 +0,0 0,4 32 +0,0 0,4 40 +0,0 0
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