1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationTests on electric and optical fibrecables under fire conditions Part 3-21: Test for vertical flame spread of vertically-mounted bunched wires or cables Category A F/RBS EN 60332-
2、3-21:2009Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 12/04/2010 07:28, Uncontrolled Copy, (c) BSINational forewordThis British Standard is the UK implementation of EN 60332-3-21:2009. Itwas derived by CENELEC from IEC 60332-3-21:200 . It supersedes BS EN50266-2-1:2001 which is withdrawn.T
3、he CENELEC common modifications have been implemented at the appropriate places in the text and are indicated by tags (e.g. ).The UK participation in its preparation was entrusted by Technical CommitteeGEL/20, Electric cables, to Subcommittee GEL/20/18, Fire testing.A list of organizations represent
4、ed on this subcommittee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application. BSI 2010 ISBN 978 0 580 66768 8 ICS 13.220.40; 29.020; 29.060.20; 33.180.10 Compliance with a
5、British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2010Amendments/corrigenda issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 60332-3-21:20090Lice
6、nsed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 12/04/2010 07:28, Uncontrolled Copy, (c) BSIEUROPEAN STANDARD EN 60332-3-21 NORME EUROPENNE EUROPISCHE NORM October 2009 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komi
7、tee fr Elektrotechnische Normung Central Secretariat: Avenue Marnix 17, B - 1000 Brussels 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60332-3-21:2009 E ICS 29.060.20; 13.220.40; 29.020 Supersedes EN 50266-2-1:2001 + corr.
8、 March 2002English version Tests on electric and optical fibre cables under fire conditions - Part 3-21: Test for vertical flame spread of vertically-mounted bunched wires or cables - Category A F/R (IEC 60332-3-21:2000, modified) Essais des cbles lectriques et des cbles fibres optiques soumis au fe
9、u - Partie 3-21: Essai de propagation verticale de la flamme des fils ou cbles en nappes en position verticale - Catgorie A F/R (CEI 60332-3-21:2000, modifie) Prfungen an Kabeln, isolierten Leitungen und Glasfaserkabeln im Brandfall - Teil 3-21: Prfung der vertikalen Flammenausbreitung von vertikal
10、angeordneten Bndeln von Kabeln und isolierten Leitungen - Prfart A F/R (IEC 60332-3-21:2000, modifiziert) This European Standard was approved by CENELEC on 2009-08-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Europea
11、n Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (Englis
12、h, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Be
13、lgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Licensed
14、 Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 12/04/2010 07:28, Uncontrolled Copy, (c) BSIForeword The text of the International Standard IEC 60332-3-21:2000, prepared by IEC TC 20, Electric cables, together with the common modifications prepared by the Technical Committee CENELEC TC 20, Electric c
15、ables, was submitted to the CENELEC Unique Acceptance Procedure and was accepted by CENELEC as EN 60332-3-21 on 2009-08-01. This European Standard supersedes EN 50266-2-1:2001 + corrigendum March 2002. The following dates were fixed: latest date by which the EN has to be implemented at national leve
16、l by publication of an identical national standard or by endorsement (dop) 2010-08-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2012-08-01 Annex ZA has been added by CENELEC. _ BS EN 60332-3-21:2009EN 60332-3-21:2009 (E) 2 Licensed Copy: Wang Bin,
17、 ISO/EXCHANGE CHINA STANDARDS, 12/04/2010 07:28, Uncontrolled Copy, (c) BSI 3 BS EN 60332-3-21:2009EN 60332-3-21:2009 (E)Endorsement notice The text of the International Standard IEC 60332-2-21:2000 was approved by CENELEC as a European Standard with agreed common modifications. Licensed Copy: Wang
18、Bin, ISO/EXCHANGE CHINA STANDARDS, 12/04/2010 07:28, Uncontrolled Copy, (c) BSIAnnex ZA (normative) Normative references to international publications with their corresponding European publications The following referenced documents are indispensable for the application of this document. For dated r
19、eferences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE Where an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Tit
20、le EN/HD Year IEC 60332-3-10 -1)Tests on electric and optical fibre cables under fire conditions - Part 3-10: Test for vertical flame spread of vertically-mounted bunched wires or cables - Apparatus EN 60332-3-10 20092)IEC 60695-4 -1)Fire hazard testing - Part 4: Terminology concerning fire tests EN
21、 60695-4 20062)IEC 60811-1-3 -1)Insulating and sheathing materials of electric and optical cables - Common test methods - Part 1-3: General application - Methods for determining the density - Water absorption tests - Shrinkage test EN 60811-1-3 19952)IEC Guide 104 -1)The preparation of safety public
22、ations and the use of basic safety publications and group safety publications - - 1)Undated reference. 2)Valid edition at date of issue. BS EN 60332-3-21:2009EN 60332-3-21:2009 (E) 4 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 12/04/2010 07:28, Uncontrolled Copy, (c) BSICONTENTSPageINTROD
23、UCTION 6Clause1 Scope 72 Normative references .73 Definitions84 Test apparatus .84.1 General.84.2 Ignition source 85 Test procedure.85.1 Test sample 85.2 Determination of the number of test pieces85.3 Mounting of the test sample.95.4 Flame application time 106 Evaluation of test results 107 Performa
24、nce requirements .108 Retest procedure109 Test report .11Annex A (normative) Guidance on cable selection for type approval testing 13Annex B (informative) Recommended performance requirements.14Figure 1 Typical arrangement and spacing of cables mounted on both sides of the standardladder (category A
25、 F/R).12Table A.1 Summary of test conditions 13BS EN 60332-3-21:2009EN 60332-3-21:2009 (E) 5 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 12/04/2010 07:28, Uncontrolled Copy, (c) BSIINTRODUCTIONParts 1 and 2 of IEC 60332 specify methods of test for flame spread characteristics for a single
26、vertical insulated wire or cable. It cannot be assumed that, because a cable or wire meets therequirements of parts 1 and 2, a vertical bunch of similar cables or wires will behave in asimilar manner. This is because flame spread along a vertical bunch of cables depends on anumber of features, such
27、asa) the volume of combustible material exposed to the fire and to any flame which may beproduced by the combustion of the cables;b) the geometrical configuration of the cables and their relationship to an enclosure;c) the temperature at which it is possible to ignite the gases emitted from the cabl
28、es;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 unarmoured, multi- or single-core.All of the foregoing assume that the cables are able to
29、be ignited when involved in an externalfire.Part 3 of IEC 60332 gives details of a test where a number of cables are bunched together toform various test sample installations. For easier use and differentiation of the various testcategories, the parts are designated as follows:Part 3-10: ApparatusPa
30、rt 3-21: Category A F/RPart 3-22: Category APart 3-23: Category BPart 3-24: Category CPart 3-25: Category DParts from 3-21 onwards define the various categories and the relevant procedures. Thecategories are distinguished by test duration, the volume of non-metallic material of the testsample and th
31、e method of mounting the sample for the test. In all categories, cables having atleast one conductor of cross-sectional area greater than 35 mm are tested in a spacedconfiguration, whereas cables of conductor cross-sectional area of 35 mm or smaller andoptical cables are tested in a touching configu
32、ration.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 offlame spread occurring in an actual fire.The method of mounting described as category A F/R (part 3-21
33、) is intended for special cabledesigns used in particular installations.Categories A, B, C and D (parts 3-22 to 3-25 respectively) are for general use where differentnon-metallic volumes are applicable.Text deleted BS EN 60332-3-21:2009EN 60332-3-21:2009 (E) 6 Licensed Copy: Wang Bin, ISO/EXCHANGE C
34、HINA STANDARDS, 12/04/2010 07:28, Uncontrolled Copy, (c) BSITESTS ON ELECTRIC AND OPTICAL FIBRE CABLES UNDERFIRECONDITIONS Part 3-21: Test for vertical flame spread of vertically-mountedbunched wires or cables Category A F/R1 ScopeThe series of International Standards covered by Parts 3-10, 3-21, 3-
35、22, 3-23, 3-24 and 3-25 ofIEC 60332 specifies methods of test for the assessment of vertical flame spread of vertically-mounted bunched wires or cables, electrical or optical, under defined conditions.NOTE For the purpose of this standard the term “electric wire or cable“ covers all insulated metall
36、ic conductorcables used for the conveyance of energy or signals.The test is intended for type approval testing. The requirements for the selection of cables fortesting are given in annex A. The flame spread is measured as the extent of damage of thecable sample. This procedure may be used to demonst
37、rate the cables ability to limit flamespread.This part of IEC 60332 covers category A F/R and relates only to power cables of conductorcross-sectional area greater than 35 mm installed on the test ladder in a spaced configurationon the front and rear to achieve a nominal total volume of non-metallic
38、 material of 7 l/m of testsample. The flame application time is 40 min. This method of mounting is intended for specialcable designs used in particular installations when required in the cable specification. CategoryA F/R is not intended for general use.A recommended performance requirement is given
39、 in annex B.2 Normative referencesThe following normative documents contain provisions which, through reference in this text,constitute provisions of this part of IEC 60332. For dated references, subsequent amendmentsto, or revisions of, any of these publications do not apply. However, parties to ag
40、reementsbased on this part of IEC 60332 are encouraged to investigate the possibility of applying themost recent editions of the normative documents indicated below. For undated references, thelatest edition of the normative document referred to applies. Members of IEC and ISO maintainregisters of c
41、urrently valid International Standards.IEC 60332-3-10:Tests on electric cables under fire conditions Part 3-10: Test for verticalflame spread of vertically-mounted bunched wires or cables ApparatusIEC 60695-4: Fire hazard testing Part 4: Terminology concerning fire testsIEC 60811-1-3: Insulating and
42、 sheathing materials of electric cables Common test methodsPart 1: General application Section 3: Methods for determining the density Waterabsorption tests Shrinkage test 7 BS EN 60332-3-21:2009EN 60332-3-21:2009 (E)Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 12/04/2010 07:28, Uncontrolle
43、d Copy, (c) BSIIEC Guide 104: The preparation of safety publications and the use of basic safety publicationsand group safety publications3 DefinitionsFor the purposeof this part of IEC 60332 the following definitions apply. The definitions aretaken from IEC 60695-4.3.1ignition sourcesource of energ
44、y that initiates combustion3.2charcarbonaceous residue resulting from pyrolysis or incomplete combustion3.3flame spreadpropagation of a flame front4 Test apparatus4.1 GeneralThe apparatus specified in IEC 60332-3-10 shall be used.4.2 Ignition sourceThe ignition source shall be one ribbon-type propan
45、e gas burner as specified in IEC 60332-3-10.5 Test procedure5.1 Test sampleThe test sample shall comprise a number of test pieces of cable from the same productionlength, 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
46、 anominal total volume of non-metallic material of 7 l/m of test sample.The test sample shall be chosen within the limitations given in annex A.The test pieces forming the test sample shall be conditioned at a temperature of (20 10) Cfor at least 16 h before commencing the test. The test pieces shal
47、l be dry.5.2 Determination of the number of test piecesIn order to calculate the appropriate number of test pieces, it is necessary to determine thevolume per metre of non-metallic material of one test piece. 8 BS EN 60332-3-21:2009EN 60332-3-21:2009 (E)Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA ST
48、ANDARDS, 12/04/2010 07:28, Uncontrolled Copy, (c) BSIA length of cable which shall be not less than 0,3 m long is carefully cut to ensure that thesurfaces are at right angles to the cable axis, thus enabling precise measurements of itslength.The density of each non-metallic component (including cell
49、ular material) shall be measured inan appropriate way, for example clause 8 of IEC 60811-1-3, in order to obtain valuesexpressed to the second decimal place.Each non-metallic material Cishall be removed from the test piece and weighed. Any non-metallic material making up less than 5 % of the total non-metallic mass of the test piece shallbe assumed to have a density of 1,0 kg/dm.Where semi-conducting screens cannot be removed from the insulating material, thecomponents may be consid
