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 3-24: Test for vertical flame spread of vertically-mounted bunched wires or cables Category CBS EN 60332-3-24
2、:2009Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 12/04/2010 07:52, Uncontrolled Copy, (c) BSINational forewordThis British Standard is the UK implementation of EN 60332-3-24:2009. It isidentical to IEC 60332-3-24:200It supersedes BS EN 50266-2-4:2001 which is withdrawn.The UK participatio
3、n 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 committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions of acon
4、tract. Users are responsible for its correct application. BSI 2010 ISBN 978 0 580 66771 8 ICS 29.060.20; 13.220.40; 29.020; 33.180.10Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and St
5、rategy Committee on 31 January 2010Amendments/corrigenda issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 60332-3-24:20090, incorporating amendment 1:2008.The start and finish of text introduced or altered by amend-ment is indicated in the text by tags. Tags indicating change
6、s to IEC text carry the number of the IEC amendment. For example, text altered by IEC amendment 1 is indicated by !“.Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 12/04/2010 07:52, Uncontrolled Copy, (c) BSIEUROPEAN STANDARD EN 60332-3-24 NORME EUROPENNE EUROPISCHE NORM October 2009 CENELEC
7、 European Committee 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
8、 for CENELEC members. Ref. No. EN 60332-3-24:2009 E ICS 29.060.20; 13.220.40; 29.020 Supersedes EN 50266-2-4:2001 + corr. March 2002English version Tests on electric and optical fibre cables under fire conditions - Part 3-24: Test for vertical flame spread of vertically-mounted bunched wires or cabl
9、es - Category C (IEC 60332-3-24:2000 + A1:2008) Essais des cbles lectriques et des cbles fibres optiques soumis au feu - Partie 3-24: Essai de propagation verticale de la flamme des fils ou cbles monts en nappes en position verticale - Catgorie C (CEI 60332-3-24:2000 + A1:2008) Prfungen an Kabeln, i
10、solierten Leitungen und Glasfaserkabeln im Brandfall - Teil 3-24: Prfung der vertikalen Flammenausbreitung von vertikal angeordneten Bndeln von Kabeln und isolierten Leitungen - Prfart C (IEC 60332-3-24:2000 + A1:2008) This European Standard was approved by CENELEC on 2009-08-01. CENELEC members are
11、 bound to comply 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 t
12、he Central 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
13、same status 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, N
14、orway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 60332-3-24:2009Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 12/04/2010 07:52, Uncontrolled Copy, (c) BSIEN 60332-3-24:2009 2 Foreword The text of the International Standard IEC 60
15、332-3-24:2000 and its amendment A1:2008, prepared by IEC TC 20, Electric cables, was submitted to the CENELEC Unique Acceptance Procedure and was accepted as EN 60332-3-24 on 2009-08-01. This European Standard supersedes EN 50266-2-4:2001 + corrigendum March 2002. The following dates were fixed: lat
16、est date by which the EN has to be implemented at national level 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. _ Endorse
17、ment notice The text of the International Standard IEC 60332-3-24:2000 and its amendment A1:2008 was approved by CENELEC as a European Standard without any modification. _ BS EN 60332-3-24:2009Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 12/04/2010 07:52, Uncontrolled Copy, (c) BSI 3 EN 60
18、332-3-24:2009 Annex 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 references, only the edition cited applies. For undated references
19、, 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 Title EN/HD Year IEC 60332-3-10 -1)Tests on electric and optical fib
20、re 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 60695-4 20062)IEC 60811-1-3 -1)Insulating and sheathing material
21、s 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 publications and the use of basic safety publications and group safety
22、publications - - 1)Undated reference. 2)Valid edition at date of issue. BS EN 60332-3-24:2009Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 12/04/2010 07:52, Uncontrolled Copy, (c) BSI 4 60332-3-24 IEC:2000+A1:2008 CONTENTS INTRODUCTION.5 1 Scope.6 2 Normative references6 3 Definitions 7 4 T
23、est 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 application time.9 6 Evaluation of test results.9 7 Performance requirements10 8 Retest procedure 10 9 Test repor
24、t10 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 the standard ladder .11 Figure 2 Touching cables mounted on the front side of the standard ladder (array
25、s of cables in contact) 11 Table A.1 Summary of test conditions.12 BS EN 60332-3-24:2009Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 12/04/2010 07:52, Uncontrolled Copy, (c) BSI60332-3-24 IEC:2000+A1:2008 5 INTRODUCTION Parts 1 and 2 of IEC 60332 specify methods of test for flame spread ch
26、aracteristics 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 spread along a vertical bunch of cables depends
27、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) the temperature at which it is possible to igni
28、te 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 unarmoured, multi- or single core. All of the foregoi
29、ng 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 the various test categories, the parts are de
30、signated 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 are distinguished by test duration, the volume
31、 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 conductor cross-sectional area of 35 mm2or small
32、er 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 flame spread occurring in an actual fire. The
33、 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 applicable. BS EN 60332-3-24:2009!Text deleted“!
34、“Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 12/04/2010 07:52, Uncontrolled Copy, (c) BSI 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 bunched wires or cables Category C 1 Sco
35、pe 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 conditions. NOTE For the purpose of t
36、his 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. The flame spread is measured as th
37、e 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 material of 1,5 l per metre of tes
38、t 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 given in annex B. 2 Normative refer
39、ences 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 60332-3-10: Tests on electric cables un
40、der 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 Common test methods Part 1: General ap
41、plication 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 BS EN 60332-3-24:2009!“Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 12
42、/04/2010 07:52, Uncontrolled Copy, (c) BSI60332-3-24 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 combustion 3.2 char carbonaceous residue re
43、sulting 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 burner as specified in IEC 60332-3-10. 5 Te
44、st 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 mate
45、rial 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 sample shall be conditioned at a temperature of (20 10) C for at least 16 h before commencing the test. The test pieces shall be dry. 5.2 Determination of the num
46、ber of test pieces In order to calculate the appropriate number of test pieces, it is necessary to determine the volume per metre of non-metallic material of one test piece. A length of cable which shall be not less than 0,3 m long is carefully cut to ensure that the surfaces are at right angles to
47、the cable axis, thus enabling precise measurements of its length. BS EN 60332-3-24:2009Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 12/04/2010 07:52, Uncontrolled Copy, (c) BSI 8 60332-3-24 IEC:2000+A1:2008 The density of each non-metallic component (including cellular material) shall be m
48、easured in an appropriate way, for example clause 8 of IEC 60811-1-3, in order to obtain values expressed 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 th
49、e test piece shall be assumed to have a density of 1,0 kg/dm. Where semi-conducting screens cannot be removed from the insulating material, the components 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 as follows: l=iiiMV where Mi is the mass of the component Ci(kg); i is the density of the component Ci(kg/dm); l is the length of the
