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 3-25: Test for vertical flame spread of vertically-mounted bunched wires or cables Category DBS EN 60332-3-25
2、:2009National forewordThis British Standard is the UK implementation of EN 60332-3-25:2009. It isidentical to IEC 60332-3-25:200It supersedes BS EN 50266-2-5:2001 which is withdrawn.The UK participation in its preparation was entrusted by Technical CommitteeGEL/20, Electric cables, to Subcommittee G
3、EL/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 acontract. Users are responsible for its correct application. BSI 2010 ISBN 978 0 580 66776 3 ICS 29.06
4、0.20; 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 Strategy Committee on 31 January 2010Amendments/corrigenda issued since publicationAmd. No. Date Text
5、 affectedBRITISH STANDARDBS EN 60332-3-25:20090, incorporating amendment 1:2008.The start and finish of text introduced or altered by amendment is indicated in the text by tags. Tags indicating changes to IEC text carry the number of the IEC amendment. For example, text altered by IEC amendment 1 is
6、 indicated by !“.EUROPEAN STANDARD EN 60332-3-25 NORME EUROPENNE EUROPISCHE NORM October 2009 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: Avenue Marnix 17, B - 10
7、00 Brussels 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60332-3-25:2009 E ICS 29.060.20; 13.220.40; 29.020 Supersedes EN 50266-2-5:2001 + corr. March 2002English version Tests on electric and optical fibre cables under fi
8、re conditions - Part 3-25: Test for vertical flame spread of vertically-mounted bunched wires or cables - Category D (IEC 60332-3-25:2000 + A1:2008) Essais des cbles lectriques et des cbles fibres optiques soumis au feu - Partie 3-25: Essai de propagation verticale de la flamme des fils ou cbles mon
9、ts en nappes en position verticale - Catgorie D (CEI 60332-3-25:2000 + A1:2008) Prfungen an Kabeln, isolierten Leitungen und Glasfaserkabeln im Brandfall - Teil 3-25: Prfung der Flammenausbreitung von vertikal angeordneten Bndeln von Kabeln und isolierten Leitungen - Prfart D (IEC 60332-3-25:2000 +
10、A1:2008) 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 European Standard the status of a national standard without any alteration. Up-to-date lists and bibliog
11、raphical 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 (English, French, German). A version in any other language made by translation under the responsibility
12、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, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece,
13、Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 60332-3-25:2009EN 60332-3-25:2009 2 Foreword The text of the International Standard IEC 60332-3-25:
14、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 60332-3-25 on 2009-08-01. This European Standard supersedes EN 50266-2-5:2001 + corrigendum March 2002. The following dates were fixed: latest date
15、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. _ Endorsement noti
16、ce The text of the International Standard IEC 60332-3-25:2000 and its amendment A1:2008 was approved by CENELEC as a European Standard without any modification. _ BS EN 60332-3-25:2009 3 EN 60332-3-25:2009 Annex ZA (normative) Normative references to international publications with their correspondi
17、ng 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, the latest edition of the referenced document (including any amendments) applies. NOTE Where an Internatio
18、nal 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 fibre cables under fire conditions - Part 3-10: Test for vertical flame spread of vertically-mounted bunched wi
19、res 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 materials of electric and optical cables - Common test methods - Part 1-3: General application - Methods for determi
20、ning 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 publications - - 1)Undated reference. 2)Valid edition at date of issue. BS EN 60332-3-25:2009 4 60332-3-25 I
21、EC:2000+A1:2008 CONTENTS 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 application time.9 6
22、Evaluation of test results.9 7 Performance requirements9 8 Retest procedure 9 9 Test report9 Annex A (normative) Guidance on cable selection for type approval testing.11 Annex B (informative) Recommended performance requirements .12 Figure 1 Touching cables mounted on the front side of the standard
23、ladder (arrays of cables in contact) 10 Table A.1 Summary of test conditions.11 BS EN 60332-3-25:200960332-3-25 IEC:2000+A1:2008 5 INTRODUCTION Parts 1 and 2 of IEC 60332 specify methods of test for flame spread characteristics for a single vertical insulated wire or cable. It cannot be assumed that
24、, 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 on a number of features, such as a) the volume of combustible material exposed to the
25、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 ignite the gases emitted from the cables; d) the quantity of combustible gas released from
26、 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 be ignited when involved in an external fire. Pa
27、rt 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 designated as follows: Part 3-10: Apparatus Part 3-21: Category A F/R Part 3-22: Categor
28、y 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 of non-metallic material of the test sample and the method of mounting the sample for
29、 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 mm or smaller are tested in a touching configuration. The categories are not necessarily related
30、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 method of mounting described as category A F/R (part 3-21) is intended for special cable designs used in
31、 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 60332-3-25:2009!Text deleted“ 6 60332-3-25 IEC:2000+A1:2008 TESTS ON ELECTRIC AND OPTICAL FIBRE CABLES UNDER FIRE CONDITIONS Part 3-25:
32、 Test for vertical flame spread of vertically-mounted bunched wires or cables Category D 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 bunch
33、ed 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 metallic conductor cables used for the conveyance of energy or signals. The test is intended for type approval testing. The requirements
34、for the selection of cables for testing are given in annex A. 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 D and relates only to small cables of ove
35、rall diameter 12 mm or smaller and cross-section of 35 mm2or smaller installed on the test ladder to achieve a nominal total volume of non-metallic material of 0,5 l/m of test sample. The flame application time is 20 min. The method of mounting uses the front of the standard ladder in touching forma
36、tion only. The category is intended for use with small cables where very low volumes of non-metallic material are required to be evaluated. A recommended performance requirement is given in annex B. 2 Normative references The following referenced documents are indispensable for the application of th
37、is 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 under fire conditions Part 3-10: Test for vertical flame spread of vertically-mounted
38、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 application Section 3: Methods for determining the density Water absorption tests Shri
39、nkage test IEC Guide 104, The preparation of safety publications and the use of basic safety publications and group safety publications BS EN 60332-3-25:2009!“!“60332-3-25 IEC:2000+A1:2008 7 3 Definitions For the purpose of this part of IEC 60332 the following definitions apply. The definitions are
40、taken from IEC 60695-4. 3.1 ignition source source of energy that initiates combustion 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
41、.2 Ignition source The ignition source shall be one ribbon-type propane gas burner 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
42、 of test pieces in the test sample shall be that number required to provide a nominal total volume of non-metallic material of 0,5 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 temperatur
43、e of (20 10) C for at least 16 h before commencing the test. The test pieces shall be dry. 5.2 Determination of the number 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 lengt
44、h 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 the cable axis, thus enabling precise measurements of its length. The density of each non-metallic component (including cellular material) shall be measured in an appropriate way, f
45、or example clause 8 of IEC 60811-1-3, in order to obtain values expressed to the second decimal place. BS EN 60332-3-25:2009 8 60332-3-25 IEC:2000+A1:2008 Each non-metallic material Ci shall be removed from the test piece and weighed. Any non-metallic material making up less than 5 % of the total no
46、n-metallic mass of the 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 ea
47、ch non-metallic material Ciis calculated as follows: l=iiiMV where Miis the mass of the component 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 sum of th
48、e individual volumes V1, V2, etc. The closest integer (0,5 and above corresponding to 1) of the number of test pieces to be mounted 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 sample Each
49、test piece shall be attached, either individually or as part of an array, to each rung of the ladder by means of metal wire (steel or copper) between 0,5 mm and 1,0 mm in diameter. Test pieces shall be attached to the front of the standard ladder in touching formation in one or more layers up to a maximum total width of 300 mm. There shall be a minimum distance of 50 mm between the edge of the test sample and the inside of the ladder uprights. When mou
