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、3-21:2009National 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 It supersedes BS EN50266-2-1:2001 which is withdrawn.The CENELEC common modifications have been implemented at the appropriate places in the text and are
3、 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 represented on this subcommittee can be obtained onrequest to its secretary.This publication does not purpor
4、t 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 British Standard cannot confer immunity from legal obligations.This British Standard was published
5、under the authority of the Standards Policy and Strategy Committee on 28 February 2010Amendments/corrigenda issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 60332-3-21:20090EUROPEAN STANDARD EN 60332-3-21 NORME EUROPENNE EUROPISCHE NORM October 2009 CENELEC European Committee
6、 for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee 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 member
7、s. Ref. No. EN 60332-3-21:2009 E ICS 29.060.20; 13.220.40; 29.020 Supersedes EN 50266-2-1:2001 + corr. 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
8、 (IEC 60332-3-21:2000, modified) Essais des cbles lectriques et des cbles fibres optiques soumis au feu - 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 Leitunge
9、n und Glasfaserkabeln im Brandfall - Teil 3-21: Prfung der vertikalen Flammenausbreitung von vertikal 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 c
10、omply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European 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
11、Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, 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
12、 as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Pola
13、nd, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Foreword 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, Electri
14、c cables, 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 l
15、evel 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 3 BS EN 60332-3-21:20
16、09EN 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. Annex ZA (normative) Normative references to international publications with their corresponding European publication
17、s 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. NOTE Where an International Publication has bee
18、n modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title 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 - Apparat
19、us EN 60332-3-10 20092)IEC 60695-4 -1)Fire hazard testing - Part 4: Terminology concerning fire tests EN 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 - Wate
20、r absorption tests - Shrinkage test EN 60811-1-3 19952)IEC Guide 104 -1)The preparation of safety publications 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 CONTENTSPageI
21、NTRODUCTION 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 Per
22、formance 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 (categ
23、ory A F/R).12Table A.1 Summary of test conditions 13BS EN 60332-3-21:2009EN 60332-3-21:2009 (E) 5 INTRODUCTIONParts 1 and 2 of IEC 60332 specify methods of test for flame spread characteristics for a singlevertical insulated wire or cable. It cannot be assumed that, because a cable or wire meets the
24、requirements 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 asa) the volume of combustible material exposed to the fire and to any flame which may beprodu
25、ced 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 cables;d) the quantity of combustible gas released from the cables for a given temperature rise;e)
26、 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 be ignited when involved in an externalfire.Part 3 of IEC 60332 gives details of a test where
27、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: ApparatusPart 3-21: Category A F/RPart 3-22: Category APart 3-23: Category BPart 3-24: Category CPart 3-2
28、5: 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 the method of mounting the sample for the test. In all categories, cables having atleast one con
29、ductor 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 configuration.The categories are not necessarily related to different safety levels in actual cable i
30、nstallations.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) is intended for special cabledesigns used in particular installations.Categories A, B, C and
31、 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 TESTS ON ELECTRIC AND OPTICAL FIBRE CABLES UNDERFIRECONDITIONS Part 3-21: Test for vertical flame spread of vertically-mountedbunched
32、 wires or cables Category A F/R1 ScopeThe series of International Standards covered by Parts 3-10, 3-21, 3-22, 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 con
33、ditions.NOTE For the purpose of this standard the term “electric wire or cable“ covers all insulated metallic 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
34、 flame spread is measured as the extent of damage of thecable sample. This procedure may be used to demonstrate 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 t
35、est ladder in a spaced configurationon the front and rear to achieve a nominal total volume of non-metallic 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
36、specification. CategoryA F/R is not intended for general use.A recommended performance requirement is given 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 reference
37、s, subsequent amendmentsto, or revisions of, any of these publications do not apply. However, parties to agreementsbased 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, the
38、latest edition of the normative document referred to applies. Members of IEC and ISO maintainregisters of currently 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 Appar
39、atusIEC 60695-4: Fire hazard testing Part 4: Terminology concerning fire testsIEC 60811-1-3: Insulating and 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 60332-3-21:200
40、9EN 60332-3-21:2009 (E)IEC 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
41、of energy 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-typ
42、e propane 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
43、 provide 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 pie
44、ces shall 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)A length of cable which shall be not l
45、ess 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 cellular material) shall be measured inan appropriate way, for example clause 8 of IEC 60811-1-
46、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 sem
47、i-conducting screens cannot be removed from the insulating material, thecomponents may be considered as one for the purpose of measuring their mass and density.The volume Vi(litres per metre of cable) of each non-metallic material Ciis calculated asfollows:lMV=iiiwhereMiis the mass of the component
48、Ci(kg);iis the density of the component Ci(kg/dm);l is the length of the test piece of cable (m).The total volume, V, of the non-metallic materials contained in 1 m of cable is equal to the sumof the individual volumes V1, V2, etc.The closest integer (0,5 and above corresponding to 1) of the number
49、of test pieces to bemounted is obtained by dividing the volume per metre, specified in 5.1, by the total volume, V,of non-metallic material per metre of cable.5.3 Mounting of the test sampleEach test piece shall be attached individually to each rung of the ladder by means of metal wire(steel or copper). For cables up to and including 50 mm diameter use wire between 0,5 mmand 1,0 mm in diameter. For cables above 50 mm diameter use wire between 1,0 mm and1,5 mm in diameter.The st
