1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS 7211:2012Electric cables Thermosetting insulatedand thermoplastic sheathedcables for voltages up toand including 450/750 V forelectric power and lightingand having low emissio
2、n ofsmoke and corrosive gaseswhen affected by firePublishing and copyright informationThe BSI copyright notice displayed in this document indicates when thedocument was last issued. The British Standards Institution 2012Published by BSI Standards Limited 2012ISBN 978 0 580 75843 0ICS 29.060.20The fo
3、llowing BSI references relate to the work on this standard:Committee reference GEL/20/17Draft for comment 12/30248745 DCPublication historyFirst published September 1989Second edition, March 1994Third edition, October 1998Fourth (present) edition, September 2012Amendments issued since publicationDat
4、e Text affectedBS 7211:2012 BRITISH STANDARDContents1 Scope 12 Normative references 13 Terms and definitions 24 Rated voltage 35 Construction 46 Conductors 47 Insulation 48 Identification of cores 59 Multi-core circular cables 510 Optional extruded inner covering 611 Sheath 612 Cable marking and add
5、itional information 713 Schedule of tests 914 Test conditions 915 Routine tests 916 Sample tests 1117 Type tests 12AnnexesAnnex A (informative) Coding cross references 18Annex B (informative) Traditional UK cables transferred to BS EN 50525 19Annex C (informative) Guide to use 21Annex D (normative)
6、Compatibility test 23Annex E (normative) Method of test for voltage withstand 24Annex F (informative) Notes on type tests 25List of figuresFigure1Anexample of the marking as used on the outer sheath of thecable 8List of tablesTable 1 Maximum permitted voltages against rated voltage of cable 3Table 2
7、 Schedule of tests 10Table 3 Thermosetting insulated, single-core, sheathed cables 6181B,450/750 V 14Table 4 Thermosetting insulated, circular 2-core 6182B, 3-core 6183B, 4-core6184B, 5-core 6185B sheathed cables, 450/750 V 15Table 5 Thermosetting insulated, single core 6241B, flat twin 6242B and fl
8、at3-core 6243B sheathed cables with circuit protective conductor (CPC)300/500 V 17Table A.1 UK and harmonized CENELEC coding cross references 18Table B.1 Halogen free, low smoke, conduit cable 450/750 V: formerlyin BS 7211 19Table B.2 Halogen free, low smoke, flexible conduit cable 450/750 V: former
9、lyin BS 7211 20Table B.3 Halogen free, low smoke, conduit cable 300/500 V: formerlyin BS 7211 20Table B.4 Halogen free low smoke flexible conduit cable 300/500 V: formerlyin BS 7211 21Table C.1 Constructional details, methods of installation and temperature forTable 3 to Table 5 22Table C.2 Guide to
10、 use 23Table D.1 Compatibility requirements 24Summary of pagesThis document comprises a front cover, an inside front cover, pages i to iv,pages 1 to 28, an inside back cover and a back cover.BRITISH STANDARD BS 7211:2012 The British Standards Institution 2012 iForewordPublishing informationThis Brit
11、ish Standard is published by BSI Standards Limited, under licence fromThe British Standards Institution, and comes into effect on 1 January 2013. It wasprepared by Subcommittee GEL/20/17, Low voltage cables, under the authorityof Technical Committee GEL/20, Electric cables. A list of organizationsre
12、presented on this committee can be obtained on request to its secretary.SupersessionThis British Standard supersedes BS 7211:1998 (incorporating AmendmentsNos. 1 and 2), which is to be withdrawn on 31 December 2012.Relationship with other publicationsThe new edition takes account of: BS EN 60228 (re
13、placing BS 6360) on conductors; BS EN 50363-5 (replacing BS 7655-5.1) on materials; BS EN 50395 (replacing Annex B of BS 7211:1998) on electrical tests; BS EN 50396 (replacing BS 6469-99.1) on thickness measurement of sheath; BS EN 60332-1-2 (replacing BS EN 50265-2-1), BS EN 60332-3-24 (replacingBS
14、 EN 50266-2-4) and BS EN 61034-2 (replacing BS EN 50268-2) on reactionto fire performance tests; BS EN 62230 (replacing BS EN 50356) on spark testing.Information about this documentIn the preparation of BS 7211, GEL/20/17 has requested that references to otherstandards for which the committee is res
15、ponsible are undated, even if referringto a specific clause. It is the committees intention not to amend thefundamentals (e.g. clause numbers, material type designation) in any of thesestandards and so the latest edition applies.This is a full revision of the standard, which has been revised due to
16、theconversion of CENELEC Harmonization Documents HD 21 and HD 22 toBS EN 50525 (all parts). The previous edition of BS 7211 included a number ofcable types that were harmonized and marked with CENELEC harmonized codedesignations. The following cables are now included in BS EN 50525 andwithdrawn from
17、 BS 7211, which now only contains national types: thermosetting insulated, non-sheathed, single core, (H07Z-U, H07Z-R andH07Z-K) 450/750 V; thermosetting insulated, non-sheathed, single core, (H05Z-U and H05Z-K)300/500 V.The content of BS 7211 has been aligned with that found in BS EN 50525, whereap
18、propriate.Annex A has been included to provide further clarification on whereinformation from BS 7211:1998 has been moved to in this edition of BS 7211and BS EN 50525-3-41. Annex B has been included to provide clarification onwhich cables have been transferred to BS EN 50525 (all parts).The importan
19、ce of the relationship between the traditional United KingdomCable Code (formerly known as the CMA coding) and its equivalent harmonizedCENELEC code designations is emphasized. This additional information helps theuser to choose the appropriate cable.BRITISH STANDARDBS 7211:2012ii The British Standa
20、rds Institution 2012Product certification/inspection/testing. Users of this British Standard are advisedto consider the desirability of third-party certification/inspection/testing ofproduct conformity with this British Standard. Users seeking assistance inidentifying appropriate conformity assessme
21、nt bodies or schemes may ask BSI toforward their enquiries to the relevant association.Hazard warningsWARNING. This British Standard calls for the use of substances and/orprocedures that can be injurious to health if adequate precautions are nottaken. It refers only to technical suitability and does
22、 not absolve the userfrom legal obligations relating to health and safety at any stage.Use of this documentIt has been assumed in the preparation of this British Standard that theexecution of its provisions will be entrusted to appropriately qualified andexperienced people, for whose use it has been
23、 produced.Presentational conventionsThe provisions of this standard are presented in roman (i.e. upright) type. Itsrequirements are expressed in sentences in which the principal auxiliary verb is“shall”.Commentary, explanation and general informative material is presented insmaller italic type, and
24、does not constitute a normative element.Requirements in this standard are drafted in accordance with The BSI guide tostandardization Section 2: Rules for the structure, drafting and presentation ofBritish Standards, subclause 11.3.1, which states, “Requirements should beexpressed using wording such
25、as: When tested as described in Annex A, theproduct shall .”. This means that only those products that are capable ofpassing the specified test will be deemed to conform to this standard.Presentational conventionsThe provisions in this British Standard are presented in roman (i.e. upright) type.Its
26、requirements are expressed in sentences in which the principal auxiliary verbis “shall”.Commentary, explanation and general informative material is presented insmaller italic type, and does not constitute a normative element.Contractual and legal considerationsThis publication does not purport to in
27、clude all the necessary provisions of acontract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legalobligations.BRITISH STANDARD BS 7211:2012 The British Standards Institution 2012 iiiBRITISH STANDARDBS 7211:2012This page deliberatel
28、y left blankiv The British Standards Institution 20121 ScopeThis British Standard specifies requirements and test methods for theconstruction and performance of cables that:a) have a thermosetting insulation of rated voltage up to and including450/750 V;b) emit limited amounts of smoke (see 16.6) an
29、d corrosive gases whensubjected to relevant tests compared with corresponding PVC cablesconforming to BS 6004;c) are intended for electric power and lighting.The types of cable included in this British Standard are: thermosetting insulated and thermoplastic low smoke halogen freesheathed cable 450/7
30、50 V single core 6181B (see Table 3); thermosetting insulated and thermoplastic low smoke halogen freesheathed circular cables 450/750 V, 2-core 6182B, 3-core 6183B, 4-core 6184Band 5-core 6185B (see Table 4); thermosetting insulated and thermoplastic low smoke halogen freesheathed cables 300/500 V
31、single-core 6241B, flat twin 6242B, flat 3-core6243B with circuit protective conductor (see Table 5).The insulation and other components are suitable to permit operation of thecables at a maximum sustained conductor temperature of 90 C and for amaximum short-circuit conductor temperature of 250 C (f
32、or a maximum periodof 5 s).NOTE 1 Limitation on the temperature of the cables may be imposed in situationswhere they could be touched, or where they could touch other materials.NOTE 2 In installations that include wiring accessories, junction boxes andconsumer units etc., the performance of these ac
33、cessories should be taken intoaccount in deciding the maximum operating temperature of the cable.NOTE 3 Annex A provides a guide to the cross-referencing of the traditional UnitedKingdom Cable Codes (formerly known as the CMA codes) and harmonized CENELECcodes. Furthermore, Annex B gives information
34、 on the traditional UK cablestransferred to BS EN 50525.NOTE 4 Annex C gives guidance on the use of the cables specified in this BritishStandard.NOTE 5 Annex D gives the compatibility test method.NOTE 6 Annex E gives the voltage withstand test.NOTE 7 Annex F gives notes on type tests.NOTE 8 In this
35、British Standard, corrosive (and acid) gases are defined as those thatare determined as HCl.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in thisdocument and are indispensable for its application. For dated references, onlythe edition cited applies. F
36、or undated references, the latest edition of thereferenced document (including any amendments) applies.BS 5099, Electric cables Voltage levels for spark testingBS 7655-1.3, Specification for insulating and sheathing materials for cables Part 1: Cross-linked elastomeric insulating compounds Section 1
37、.3: XLPEBRITISH STANDARD BS 7211:2012 The British Standards Institution 2012 1BS 7655-6.1, Specification for insulating and sheathing materials for cables Part 6: Thermoplastic sheathing compounds having low emission of corrosivegases, and suitable for use in cables having low emission of smoke when
38、affected by fire Section 6.1: General application thermoplastic typesBS EN 50267-2-1, Common test methods for cables under fire conditions Tests on gases evolved during combustion of materials from cables Part2-1: Procedures Determination of the amount of halogen acid gasBS EN 50363-5, Insulating, s
39、heathing and covering materials for low voltageenergy cables Part 5: Halogen-free, cross-linked insulating compoundsBS EN 50395, Electrical test methods for low voltage energy cablesBS EN 50396, Non electrical test methods for low voltage energy cablesBS EN 60228, Conductors of insulated cablesBS EN
40、 60332-1-2:2004, Tests on electric and optical fibre cables under fireconditions Part 1-2: Test for vertical flame propagation for a single insulatedwire or cable Procedure for 1 kW pre-mixed flameBS EN 60332-3-24:2009, Tests on electric and optical fibre cables under fireconditions Part 3-24: Test
41、for vertical flame spread of vertically-mountedbunched wires or cables Category CBS EN 60811-401, Electric and optical fibre cables Test methods fornon-metallic materials Part 401: Environmental tests Thermal ageing methods Ageing in an air ovenBS EN 60811-501, Electric and optical fibre cables Test
42、 methods fornon-metallic materials Part 501: Mechanical tests Tests for determining themechanical properties of insulating and sheathing compoundsBS EN 60811-502, Electric and optical fibre cables Test methods fornon-metallic materials Part 502: Mechanical tests Shrinkage test forinsulationsBS EN 61
43、034-2, Measurement of smoke density of cables burning under definedconditions Part 2: Test procedure and requirementsBS EN 62230, Electric cables Spark-test methodIEC 60050-461, International Electro technical Vocabulary Part 461: Electriccables3 Terms and definitionsFor the purposes of this British
44、 Standard, the terms and definitions given inIEC 60050-461 and the following apply.3.1 cable manufacturerorganization that has the capability to both produce and control the conformityof cable made to this British StandardNOTE See 12.1a) for information on marking the cable with the cablemanufacture
45、rs name and identifier.3.2 length of layaxial length of one complete turn of the helix formed by one cable component3.3 routine tests, Rtests made on all production lengths of cable to demonstrate their integrityBRITISH STANDARDBS 7211:20122 The British Standards Institution 20123.4 sample tests, St
46、ests made on samples of completed cable, or components taken from acompleted cable, adequate to verify that the product meets the designspecifications3.5 type tests, Ttests made before supplying, on a general commercial basis, a type of cablecovered by this British Standard, in order to demonstrate
47、satisfactoryperformance characteristics to meet the intended applicationNOTE These tests are of such a nature that, after they have been made, they neednot be repeated unless changes are made in the cable materials, design or type ofmanufacturing process, which might change the performance character
48、istics.3.6 values3.6.1 approximate valuevalue which is only indicativeNOTE Values described as “approximate” do not constitute requirements to bechecked by measurement.3.6.2 nominal valuevalue by which a quantity is designatedNOTE Nominal values usually give rise to values to be checked by measureme
49、ntstaking into account specified tolerances.3.7 voltages3.7.1 maximum voltage, Ummaximum sustained power-frequency voltage between phase conductors forwhich the cable is suitable3.7.2 rated voltage, U0nominal power-frequency voltage between conductor(s) and earth for which thecable is suitable3.7.3 rated voltage, Unominal power-frequency voltage between phase conductors for which thecable is suitable4 Rated voltageThe cables shall be designated by the rated voltages U0and U, ex
