1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-21082-3 SANS 60423:2008 Edition 2 IEC 60423:2007 Edition 3 SOUTH AFRICAN NATIONAL STANDARD Conduit systems for cable management Outside di
4、ameters of conduits for electrical installations and threads for conduits and fittings This national standard is the identical implementation of IEC 60423:2007, and is adopted with the permission of the International Electrotechnical Commission. Published by Standards South Africa 1 dr lategan road
5、groenkloof private bag x191 pretoria 0001 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa This standard may only be used and printed by approved subscription and freemailing clients of the SABS.SANS 60423:2008 Edition 2 IEC 60423:2007 Edition 3
6、Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee StanSA SC 67C, Electricity distribution systems and components Electrical accessories, in accordance with procedures of Standards South Africa, in compliance with annex 3 of the WT
7、O/TBT agreement. This SANS document was published in April 2008. This SANS document supersedes SABS IEC 60423:1993 (first edition). This standard may only be used and printed by approved subscription and freemailing clients of the SABS. IEC 60423 Edition 3.0 2007-08 INTERNATIONAL STANDARD NORME INTE
8、RNATIONALE Conduit 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 installations lectriques et filetages pour conduits et accessoiresINTERN
9、ATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE M ICS 29.120.10 PRICE CODE CODE PRIX ISBN 2-8318-9268-6 SANS 60423:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS. 2 60423 IEC:2007 CONTENTS FOREWORD.3 INTRODUC
10、TION.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 outside diameters of threadable conduits10 Figure 3a Gauges for checking minimum outside diame
11、ters 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 of threadable conduits.12 Table 1 Outside diameters for threadable conduits and thread deta
12、ils for conduits and associated fittings .8 Table 2 Outside diameters for non-threadable conduit 9 SANS 60423:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.60423 IEC:2007 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ CONDUIT SYSTEMS FOR C
13、ABLE MANAGEMENT OUTSIDE DIAMETERS 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 Committee
14、s). 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 International Standards, Technical Specifications, Technical Reports, Publicly Available
15、Specifications (PAS) and Guides (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 organiz
16、ations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical mat
17、ters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC Nation
18、al Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IE
19、C National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC provi
20、des no marking procedure to indicate 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, employe
21、es, servants or agents including 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 p
22、ublication, use of, or reliance 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 pos
23、sibility 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 60423 has been prepared by subcommittee 23A: Cable management systems, of IEC technical committe
24、e 23: Electrical accessories. 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; condu
25、it range increased to 110 mm 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. SANS 60423:2008This stan
26、dard may only be used and printed by approved subscription and freemailing clients of the SABS. 4 60423 IEC:2007 This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. The committee has decided that the contents of this publication will remain unchanged until the mainte
27、nance 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 publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. SANS 60423:2008This standard may only be used and printed by approve
28、d subscription and freemailing clients of the SABS.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 61386 series). SANS 60423:2008This
29、standard may only be used and printed by approved subscription and freemailing clients of the SABS. 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 out
30、side diameters for conduits used in electrical installations or in communication systems 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 spec
31、ified in IEC 60981. 2 Normative references The following referenced documents are indispensable 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
32、-1:1998, ISO general purpose screw threads Basic profile Part 1: Metric screw threads ISO 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
33、 diameters, tolerances and details of threadable conduit and external and internal metric 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 Gauge
34、s External threads are checked by means of threaded GO ring gauges and plain NO-GO ring 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 G
35、O ring gauges specified in Figure 2 and NO-GO gap gauges specified in Figure 3a for threadable rigid metal conduits, or NO-GO ring gauges specified in Figure 3b for threadable conduits other than rigid metal. SANS 60423:2008This standard may only be used and printed by approved subscription and free
36、mailing clients of the SABS.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. SANS 60423:2008This standard may only be used and printed by approved subscription and freemai
37、ling clients of the SABS. 8 60423 IEC:2007 Table 1 Outside diameters for threadable conduits and thread details for conduits and associated fittings Dimensions in millimetres Outside diameters and thread for conduits External threads Internal threads Major diameter (d) Effective diameter (d 2) Minor
38、 diameter (d 1) Major diameter (D) Effective diameter (D 2) Minor diameter (D 1) Outside diameters Metric threads Class of fit Pitch max. min. max. min. max. min. min. max. min. max. min. 6 0/0,1 M6 0,75 6 g/6H 0,75 5,978 5,838 5,491 5,391 5,058 4,929 6,000 5,645 5,513 5,378 5,188 8 0/0,2 M8 1 8 g/7
39、H 1,00 7,974 7,694 7,324 7,144 6,747 6,528 8,000 7,540 7,350 7,217 6,917 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 9,217 8,917 12 0/0,3 M12 1,5 8 g/7H 1,50 11,968 11,593 10,994 10,770 10,128 9,846 12,000 11,262 11,026 10,751 10,376 16 0/0,3 M16 1,5 8 g/7H 1,50
40、 15,968 15,593 14,994 14,770 14,128 13,846 16,000 15,262 15,026 14,751 14,376 20 0/0,3 M20 1,5 8 g/7H 1,50 19,968 19,593 18,994 18,770 18,128 17,846 20,000 19,262 19,026 18,751 18,376 25 0/0,4 M25 1,5 8 g/7H 1,50 24,968 24,593 23,994 23,758 23,128 22,834 25,000 24,276 24,026 23,751 23,376 32 0/0,4 M
41、32 1,5 8 g/7H 1,50 31,968 31,593 30,994 30,758 30,128 29,834 32,000 31,276 31,026 30,751 30,376 40 0/0,4 M40 1,5 8 g/7H 1,50 39,968 39,593 38,994 38,758 38,128 37,834 40,000 39,276 39,026 38,751 38,376 50 0/0,4 M50 1,5 8 g/7H 1,50 49,968 49,593 48,994 48,744 48,128 47,820 50,000 49,291 49,026 46,751
42、 48,376 63 0/0,4 M63 1,5 8 g/7H 1,50 62,968 62,593 61,994 61,744 61,128 60,820 63,000 62,291 62,026 61,751 61,376 75 0/0,4 M75 1,5 8 g/7H 1,50 74,698 74,593 73,994 73,744 73,128 72,820 75,000 74,291 74,026 73,751 73,376 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,
43、001 88,701 88,310 87,835 110 0/0,5 M110 2 8 g/7H 2,00 109,962 109,512 108,663 108,383 107,508 107,151 110,000 109,001 108,701 108,310 107,835 NOTE See Figure 1 for details. SANS 60423:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.60423 IE
44、C: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 0,4 50 +0,0 0,5 63 +0,0 0,6 75 +0,0 0,7 90 +0,0 0,9 110 +0,0 1,1 P P 2 P 8 P 4 3/8 H H 8 H 4 H 5/8 H D
45、, d D 2 , d 2D 1 , d 130 60 90 Axis of screw thread IEC 1566/073/8 H = 0,324 76 P H = 0,866 03 P 5/8 H = 0,541 27 P P = Pitch Figure 1 Basic profile of screw threads SANS 60423:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS. 10 60423 IEC:2
46、007 d d g15 0,3b b Slightly rounded edges IEC 1567/07Admissible wear: +0,01 mm Material: steel It shall be possible to slide the gauge completely over the conduit without excessive force. For conduits normally provided with a protective coating, this test may be carried out before the application of
47、 the protective coating. Size mm d g a mm b mm d mm 6 6,04 8 32 8 8,04 8 32 10 10,04 8 32 12 12,04 10 38 16 16,04 12 45 20 20,04 12 45 25 25,04 16 60 32 32,04 18 70 40 40,04 18 70 50 50,04 20 85 63 63,04 20 100 75 75,04 24 120 NOTE For conduits above 75 mm, alternate appropriate measuring methods ma
48、y be used. a Manufacturing tolerance: 00 0 01 0 , , + mm Figure 2 Gauges for checking maximum outside diameters of threadable conduits SANS 60423:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.60423 IEC:2007 11 e 2e 1g c s Slightly rounded
49、 edges IEC 1568/07 Material: steel It shall not be possible to pass the gauge over the conduit, in any position, without excessive force. C Manufacturing tolerance Admissible wear e 1e 2 g s Size mm mm mm mm mm mm mm 6 5,900 +0,000 0,016 +0,016 0,000 8 7,800 +0,000 0,016 +0,016 0,000 10 9,800 +0,000 0,016 +0,016 0,000 5 11 12 7 12 11,700 +0,000 0,018 +0,018 0,000 6 13 14 8 16 15,700 +
