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. ICS 29.120.10 ISBN 0-626-14441-8 SANS 61386-21:2003 Edition 1 IEC 61386-21:2002 Edition 1 SOUTH AFRICAN NATIONAL STANDARD Conduit systems for cable manag
4、ement Part 21: Particular requirements Rigid conduit systems This national standard is the identical implementation of IEC 61386-21:2002 and is adopted with the permission of the International Electrotechnical Commission. Published by Standards South Africa 1 dr lategan road groenkloof ! private bag
5、 x191 pretoria 0001 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa 2003 SANS 61386-21:2003 Edition 1 IEC 61386-21:2002 Edition 1 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Commi
6、ttee, STANSA SC 67C, Electrical accessories, in accordance with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. This standard is identical to and is reproduced from IEC 61386-21:2002. NORMEINTERNATIONALECEIIECINTERNATIONALSTANDARD61386-21Premire ditionFirst
7、 edition2002-02Systmes de conduitspour installations lectriques Partie 21:Rgles particulires Systmes de conduits rigidesConduit systems for cable management Part 21:Particular requirements Rigid conduit systemsNumro de rfrenceReference numberCEI/IEC 61386-21:200261386-21 IEC:2002 3 CONTENTSFOREWORD.
8、51 Scope.92 Normative references93 Definitions 94 General requirements .95 General conditions for tests 96 Classification 97 Marking and documentation 98 Dimensions.119 Construction .1310 Mechanical properties.1311 Electrical properties 1712 Thermal properties .1713 Fire hazard .1914 External influe
9、nces .1915 Electromagnetic compatibility19Figure 101 Bending apparatus for metallic and composite conduits.21Figure 102 Gauge for checking the minimum inside diameter of the conduit systemafter impact, bending, collapse and resistance to heat tests.23Figure 103 Bending apparatus for non-metallic and
10、 composite conduit25Figure 104 Arrangement for collapse test .27Table 101 Thread lengths.11Table 102 Maximum entry diameter and minimum entry length details 1361386-21 IEC:2002 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION_CONDUIT SYSTEMS FOR CABLE MANAGEMENT Part 21: Particular requirements Rigid con
11、duit systemsFOREWORD1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprisingall national electrotechnical committees (IEC National Committees). The object of the IEC is to promoteinternational co-operation on all questions concerning standardi
12、zation in the electrical and electronic fields. Tothis end and in addition to other activities, the IEC publishes International Standards. Their preparation isentrusted to technical committees; any IEC National Committee interested in the subject dealt with mayparticipate in this preparatory work. I
13、nternational, governmental and non-governmental organizations liaisingwith the IEC also participate in this preparation. The IEC collaborates closely with the International Organizationfor Standardization (ISO) in accordance with conditions determined by agreement between the twoorganizations.2) The
14、 formal decisions or agreements of the IEC on technical matters express, as nearly as possible, aninternational consensus of opinion on the relevant subjects since each technical committee has representationfrom all interested National Committees.3) The documents produced have the form of recommenda
15、tions for international use and are published in the formof standards, technical specifications, technical reports or guides and they are accepted by the NationalCommittees in that sense.4) In order to promote international unification, IEC National Committees undertake to apply IEC InternationalSta
16、ndards transparently to the maximum extent possible in their national and regional standards. Anydivergence between the IEC Standard and the corresponding national or regional standard shall be clearlyindicated in the latter.5) The IEC provides no marking procedure to indicate its approval and canno
17、t be rendered responsible for anyequipment declared to be in conformity with one of its standards.6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subjectof patent rights. The IEC shall not be held responsible for identifying any or all suc
18、h patent rights.International Standard IEC 61386-21 has been prepared by subcommittee 23A: Cablemanagement systems, of IEC technical committee 23: Electrical accessories.The text of this standard is based on the following documents:FDIS Report on voting23A/369/FDIS 23A/372/RVDFull information on the
19、 voting for the approval of this standard can be found in the report onvoting indicated in the above table.This publication has been drafted in accordance with the ISO/IEC Directives, Part 3.This part 21, which specifies particular requirements for rigid conduit systems, is to be used inconjunction
20、with IEC 61386-1, Conduit systems for electrical installations Part 1: GeneralRequirements, and its amendments1. It was established on the basis of the first edition (1996)of that standard and its amendment 1 (2000)._1Please note that the generic title of the IEC 61386 series has been changed to Con
21、duit systems for cablemanagement since the publication of part 1, hence all other parts of the series are now published under this newtitle.61386-21 IEC:2002 7 This part 21 supplements or modifies the corresponding clauses of IEC 61386-1. Where aparticular clause or subclause of part 1 is not mentio
22、ned in this part 21, that clause orsubclause applies as far as is reasonable. Where this part 21 states “addition“, “modification“or “replacement“, the relevant text of part 1 is to be adapted accordingly.Subclauses, tables and figures which are in addition to those in part 1 are numbered startingwi
23、th 101.A conduit system which complies with this standard, is deemed safe for use when installed inaccordance with national wiring regulations, whilst applying the manufacturers installationinstructions and conduit classification.NOTE The following print types are used: requirements: in roman type t
24、est specifications: in italic type notes: in small roman typeThe committee has decided that the contents of this publication will remain unchanged until2006-12. At this date, the publication will be reconfirmed; withdrawn; replaced by a revised edition, or amended.61386-21 IEC:2002 9 CONDUIT SYSTEMS
25、 FOR CABLE MANAGEMENT Part 21: Particular requirements Rigid conduit systems1 ScopeThis clause of part 1 is applicable, except as follows:Addition:This part of IEC 61386 specifies the requirements for rigid conduit systems.2 Normative referencesThis clause of part 1 is applicable.3 DefinitionsThis c
26、lause of part 1 is applicable.4 General requirementsThis clause of part 1 is applicable.5 General conditions for testsThis clause of part 1 is applicable.6 ClassificationThis clause of part 1 is applicable, except as follows:6.1.1 1, 6.1.2 1, 6.1.3 2, 6.1.3 3, 6.1.3 4, 6.1.4 1 and 6.1.5 1 are not ap
27、plicable.NOTE Rigid conduit systems according to 6.1.1 2 and 6.1.2 2 and classification 1X from 6.2.1, table 1 are notallowed in France.7 Marking and documentationThis clause of part 1 is applicable, except as follows:Addition:7.1.101 The conduit shall be marked in accordance with 7.1 along its enti
28、re length at regularintervals of preferably 1 m but not longer than 3 m and each length shall be marked at leastonce.Compliance is checked by inspection.61386-21 IEC:2002 11 7.1.102 The manufacturer shall document for the system the minimum inside diameter andthe classification in accordance with cl
29、ause 6.Compliance is checked by inspection.8 DimensionsReplacement:8.1 Threads and outside diameters shall comply with IEC 60423.Compliance is checked by means of the gauges specified in IEC 60423.8.2 Threadable conduits and threadable conduit fittings, except terminating conduit fittings,shall comp
30、ly with table 101. Non-threadable conduit fittings, except fittings which are part of aconduit system declaring tensile strength, shall comply with table 102. The minimum insidediameter of the conduit system shall be as declared by the manufacturer.Compliance is checked by measurement.Table 101 Thre
31、ad lengthsExternal thread Internal threadSize Minimum lengthmmMinimum lengthmm681012162025324050637505,506,508,510,512,514,017,019,019,019,019,019,006,507,509,511,513,515,018,020,020,020,020,020,061386-21 IEC:2002 13 Table 102 Maximum entry diameter and minimum entry length detailsExternal thread In
32、ternal threadSize Maximum entry diametermmMinimum entry lengthmm681012162025324050637506,508,510,512,516,520,525,532,640,750,863,975,906,008,010,012,016,020,025,030,032,042,050,050,09 ConstructionThis clause of part 1 is applicable.10 Mechanical propertiesThis clause of part 1 is applicable, except
33、as follows:10.4 Bending testReplacement:Conduits which are declared by the manufacturer as being bendable are tested in accordancewith 10.4.101, 10.4.102 or 10.4.103.10.4.101 Metallic conduits10.4.101.1 Conduit sizes 16, 20 and 25 are subjected to a bending test by means of theapparatus shown in fig
34、ure 101. Testing of other sizes is in accordance with the manufacturersinstructions.10.4.101.2 Samples having a length equal to 30 times the nominal diameter, are bent so thatwhen released, they have an angle of (90 5), so that the inside radius of the bend is equal tosix times the nominal diameter.
35、10.4.101.3 For conduits with welded seams, six samples are tested, three with the seam onthe outside of the bend, three with the seam on the side.61386-21 IEC:2002 15 10.4.101.4 After the test: the basic material of the conduits and the protective coating of the conduits shall show nocracks visible
36、to normal or corrected vision without magnification; seams, if any, shall not have opened; the section of the conduit shall not have distorted unduly.The distortion of the section is checked as follows:When the bent conduit is held in such a position that the straight portions are at an angle ofappr
37、oximately 45 to the vertical, one end of the sample pointing upwards and the otherdownwards, it shall be possible to pass the appropriate gauge as shown in figure 102 throughthe sample under its own weight and without any initial speed.10.4.102 Non-metallic conduits10.4.102.1 Conduit sizes 16, 20 an
38、d 25 are subjected to a bending test by means of theapparatus shown in figure 103. The length of the sample is approximately 500 mm. Testing ofother sizes is in accordance with the manufacturers instructions.10.4.102.2 A bending aid, in the form of a coiled spring of square section metal wire, witho
39、utburrs and having an overall diameter between 0,7 mm and 1,0 mm less than the specifiedminimum inside diameter of the conduit, or a bending aid recommended by the manufacturer, isinserted into each sample before bending.10.4.102.3 Before the test, the sample with the bending aid inserted is conditi
40、oned for at least2 h in a refrigerator within which the temperature is maintained at the declared temperature asgiven in table 1 with a tolerance of +2 C.The bending apparatus is placed beside the refrigerator and the test is carried out within 10 safter the removal of the sample from the refrigerat
41、or.10.4.102.4 Each sample is placed in position as shown in figure 103, and held lightly in thegroove of the former by means of the clamp. The sample is bent round the former by movingthe bending rollers so that, when released, it has an angle of (90 5), In this position, it shallbe possible to remo
42、ve the bending aid without damage to the sample or the aid.After the test, the sample shall show no cracks visible to normal or corrected vision withoutmagnification and it shall be possible to pass the appropriate gauge, as shown in figure 102,through the sample under its own weight and without any
43、 initial speed.10.4.103 Composite conduitsComposite conduits which are declared by the manufacturer as being bendable are tested bothin accordance with 10.4.101 and 10.4.102, using new samples for each test.The test is carried out at the declared temperature as given in table 1 with a tolerance of +
44、2 C.61386-21 IEC:2002 17 10.5 Flexing testThis subclause of part 1 is not applicable.10.6 Collapse testReplacement:10.6.101 Metallic conduitsMetallic conduits are not subjected to a collapse test.10.6.102 Non-metallic and composite conduits10.6.102.1 Conduits which are declared by the manufacturer a
45、s being bendable shall betested in accordance with 10.4.102 with the exception of 10.4.102.3.10.6.102.2 The samples are fixed to a rigid support by means of four straps, as shown infigure 104, after having removed the bending spring or any other bending aids recommendedby the manufacturer.The suppor
46、t with the sample in position is kept for 24 h 15 min in a heating cabinet at thedeclared temperature as given in table 2 with a tolerance of +2 C.After this period, with the support in such a position that the straight portions of the sample areat an angle of approximately 45 to the vertical, one e
47、nd of the sample pointing upwards andthe other downwards, it shall be possible to pass the appropriate gauge, as shown infigure 102, through the sample under its own weight and without any initial speed.10.7 Tensile strengthThis subclause of part 1 is applicable, except as follows:10.7.3 Not applica
48、ble.11 Electrical propertiesThis clause of part 1 is applicable.12 Thermal propertiesThis clause of part 1 is applicable, except as follows:12.3 Replacement:The load is then removed and immediately after its removal it shall be possible to pass theappropriate gauge, as shown in figure 102, through t
49、he conduit under its own weight andwithout any initial speed, with the sample in the vertical position.61386-21 IEC:2002 19 13 Fire hazardThis clause of part 1 is applicable.14 External influencesThis clause of part 1 is applicable.15 Electromagnetic compatibilityThis clause of part 1 is applicable.61386-21 IEC:2002 21 Bending radius Radius of grooveSizeInside radius RmmOutside radius R1mmrmm162025961201501131411788,110,112,7NOTE This drawing is not intende
