SANS 60332-3-24-2009 Tests on electric and optical fibre cables under fire conditions Part 3-24 Test for vertical flame spread of vertically-mounted bunched wires or cables - Categ.pdf

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 978-0-626-22809-5 SANS 60332-3-24:2009Edition 1.1 and nat. amdt 1IEC 60332-3-24:2009Edition 1.1SOUTH AFRICAN NATIONAL STANDARD Tests on electric and

4、 optical fibre cables under fire conditions Amdt 1 Part 3-24: Test for vertical flame spread of vertically-mounted bunched wires or cables Category C This national standard is the identical implementation of IEC 60332-3-24:2009 and is adopted with the permission of the International Electrotechnical

5、 Commission. Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 60332-3-24:2009 Edition 1.1 and nat. amdt 1 IEC 60332-3-24:2009 Edition 1.1 Table of changes Change No. Date Scope Nat. amdt

6、 1 2007 Amended to change the designation from SABS to SANS, with no technical changes. IEC amdt 1 2008 Amended to include optical fibre cables in the standard, and to specify a precondition in the retest procedure. National foreword This South African standard was approved by National Committee SAB

7、S TC 66, Electric cables, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in May 2009. This SANS document supersedes SANS 60332-3-24:2000 (edition 1 as modified by nat. amdt 1:2007). IEC 60332-3-24Edi

8、tion 1.1 2009-02INTERNATIONAL STANDARD NORME INTERNATIONALETests on electric and optical fibre cables under fire conditions Part 3-24: Test for vertical flame spread of vertically-mounted bunched wires or cables Category C Essais des cbles lectriques et des cbles fibres optiques soumis au feu Partie

9、 3-24: Essai de propagation verticale de la flamme des fils ou cbles monts en nappes en position verticale Catgorie C INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE CBICS 29.060.20;13.220.40; 29.020 PRICE CODECODE PRIXISBN 2-8318-1029-6GROUP SAFETY PUBLICATION P

10、UBLICATION GROUPE DE SCURIT Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale SANS 60332-3-24:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS . 2 60332-3-24

11、IEC:2000+A1:2008 CONTENTS FOREWORD.3 INTRODUCTION.5 1 Scope.6 2 Normative references6 3 Definitions 7 4 Test apparatus .7 4.1 General .7 4.2 Ignition source.7 5 Test procedure .7 5.1 Test sample.7 5.2 Determination of the number of test pieces 7 5.3 Mounting of the test sample .8 5.4 Flame applicati

12、on time.9 6 Evaluation of test results.9 7 Performance requirements10 8 Retest procedure 10 9 Test report10 Annex A (normative) Guidance on cable selection for type approval testing.12 Annex B (informative) Recommended performance requirements .13 Figure 1 Spaced cables mounted on the front side of

13、the standard ladder .11 Figure 2 Touching cables mounted on the front side of the standard ladder (arrays of cables in contact) 11 Table A.1 Summary of test conditions.12 SANS 60332-3-24:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .603

14、32-3-24 IEC:2000+A1:2008 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ TESTS ON ELECTRIC AND OPTICAL FIBRE CABLES UNDER FIRE CONDITIONS Part 3-24: Test for vertical flame spread of vertically-mounted bunched wires or cables Category C FOREWORD 1) The International Electrotechnical Commission (IEC) i

15、s a worldwide organization for standardization 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

16、 other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in

17、the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with condit

18、ions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC Natio

19、nal Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National 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

20、 in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC

21、Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC provides 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 en

22、sure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, 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

23、 any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, 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 r

24、eferenced publications is indispensable for the correct application of this 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. In

25、ternational Standard IEC 60332-3-24 has been prepared by IEC technical committee 20: Electric cables. It has the status of a group safety publication in accordance with IEC Guide 104. IEC 60332-3-24 forms one of a series of publications dealing with tests on electric cables under fire conditions; th

26、e series supersedes IEC 60332-3 published in 1992. The parts of the series are described in the introduction. All pre-existing categories of test are retained and updated. A new category (category D) has been added to cater for testing at very low non-metallic volumes. SANS 60332-3-24:2009This s tan

27、dard may only be used and printed by approved subscription and freemailing clients of the SABS . 4 60332-3-24 IEC:2000+A1:2008 This consolidated version of IEC 60332-3-24 consists of the first edition (2000) documents 20/406/FDIS and 20/430/RVD and its amendment 1 (2008) documents 20/936/CDV and 20/

28、985A/RVC. The technical content is therefore identical to the base edition and its amendment and has been prepared for user convenience. It bears the edition number 1.1. A vertical line in the margin shows where the base publication has been modified by amendment 1. Annex A forms an integral part of

29、 this standard. Annex B is for information only. The committee has decided that the contents of the base publication and its amendments 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.

30、 At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. SANS 60332-3-24:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .60332-3-24 IEC:2000+A1:2008 5 INTRODUCTION Parts 1 and 2 of IEC 6033

31、2 specify methods of test for flame spread characteristics for a single vertical insulated wire or cable. It cannot be assumed that, because a cable or wire meets the requirements of parts 1 and 2, a vertical bunch of similar cables or wires will behave in a similar manner. This is because flame spr

32、ead along a vertical bunch of cables depends on a number of features, such as a) the volume of combustible material exposed to the fire and to any flame which may be produced by the combustion of the cables; b) the geometrical configuration of the cables and their relationship to an enclosure; c) th

33、e temperature at which it is possible to ignite the gases emitted from the cables; d) the quantity of combustible gas released from the cables for a given temperature rise; e) the volume of air passing through the cable installation; f) the construction of the cable, for example armoured or unarmour

34、ed, multi- or single core. All of the foregoing assume that the cables are able to be ignited when involved in an external fire. Part 3 of IEC 60332 gives details of a test where a number of cables are bunched together to form various test sample installations. For easier use and differentiation of

35、the various test categories, the parts are designated as follows: Part 3-10: Apparatus Part 3-21: Category A F/R Part 3-22: Category A Part 3-23: Category B Part 3-24: Category C Part 3-25: Category D Parts from 3-21 onwards define the various categories and the relevant procedures. The categories a

36、re distinguished by test duration, the volume of non-metallic material of the test sample and the method of mounting the sample for the test. In all categories, cables having at least one conductor of cross-sectional area greater than 35 mm are tested in a spaced configuration, whereas cables of con

37、ductor cross-sectional area of 35 mm2or smaller and optical cables are tested in a touching configuration. The categories are not necessarily related to different safety levels in actual cable installations. The actual installed configuration of the cables may be a major determinant in the level of

38、flame spread occurring in an actual fire. The method of mounting described as category A F/R (part 3-21) is intended for special cable designs used in particular installations. Categories A, B, C and D (parts 3-22 to 3-25 respectively) are for general use where different non-metallic volumes are app

39、licable. SANS 60332-3-24:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS . 6 60332-3-24 IEC:2000+A1:2008 TESTS ON ELECTRIC AND OPTICAL FIBRE CABLES UNDER FIRE CONDITIONS Part 3-24: Test for vertical flame spread of vertically-mounted bunch

40、ed wires or cables Category C 1 Scope The series of International Standards covered by Parts 3-10, 3-21, 3-22, 3-23, 3-24 and 3-25 of IEC 60332 specifies methods of test for the assessment of vertical flame spread of vertically-mounted bunched wires or cables, electrical or optical, under defined co

41、nditions. NOTE For the purpose of this standard, the term electric wire or cable covers all insulated metallic conductor cables used for the conveyance of energy or signals. The test is intended for type approval testing. The requirements for the selection of cables for testing are given in annex A.

42、 The flame spread is measured as the extent of damage of the cable sample. This procedure may be used to demonstrate the cables ability to limit flame spread. This part of IEC 60332 covers category C and relates to cables installed on the test ladder to achieve a nominal total volume of non-metallic

43、 material of 1,5 l per metre of test sample. The flame application time is 20 min. The method of mounting uses the front of the standard ladder. The category is intended for general use where low volumes of non-metallic material are required to be evaluated. A recommended performance requirement is

44、given in annex B. 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. IEC 6033

45、2-3-10: Tests on electric cables under fire conditions Part 3-10: Test for vertical flame spread of vertically-mounted bunched wires or cables Apparatus IEC 60695-4: Fire hazard testing Part 4: Terminology concerning fire tests IEC 60811-1-3: Insulating and sheathing materials of electric cables Com

46、mon test methods Part 1: General application Section 3: Methods for determining the density Water absorption tests Shrinkage test IEC Guide 104: The preparation of safety publications and the use of basic safety publications and group safety publications SANS 60332-3-24:2009This s tandard may only b

47、e used and printed by approved subscription and freemailing clients of the SABS .60332-3-24 IEC:2000+A1:2008 7 3 Definitions For the purpose of this part of IEC 60332 the following definitions apply. The definitions are taken from IEC 60695-4. 3.1 ignition source source of energy that initiates comb

48、ustion 3.2 char carbonaceous residue resulting from pyrolysis or incomplete combustion 3.3 flame spread propagation of a flame front 4 Test apparatus 4.1 General The apparatus specified in IEC 60332-3-10 shall be used. 4.2 Ignition source The ignition source shall be one ribbon-type propane gas burn

49、er as specified in IEC 60332-3-10. 5 Test procedure 5.1 Test sample The test sample shall comprise a number of test pieces of cable from the same production length, each having a minimum length of 3,5 m. The total number of test pieces in the test sample shall be that number required to provide a nominal total volume of non-metallic material of 1,5 l/m of test sample. The test sample shall be chosen within the limitations given in annex A. The test pieces forming the test