BS 6724-2016 Electric cables Thermosetting insulated armoured cables of rated voltages of 600 1 000 V and 1 900 3 300 V for fixed installations having low emission of smoke and cor.pdf

1、BS 6724:2016Incorporating Corrigenda Nos. 1 and 2Electric cables Thermosetting insulated,armoured cables of ratedvoltages of 600/1 000 Vand 1 900/3 300 V for fixedinstallations, having lowemission of smoke andcorrosive gases whenaffected by fire SpecificationBSI Standards PublicationWB11885_BSI_Stan

2、dardCovs_2013_AW.indd 1 15/05/2013 15:06Publishing and copyright informationThe BSI copyright notice displayed in this document indicates when the documentwas last issued. The British Standards Institution 2017Published by BSI Standards Limited 2017ISBN 978 0 580 97055 9ICS 29.060.20The following BS

3、I references relate to the work on this standard:Committee reference GEL/20/17Draft for comment 15/30301443 DCPublication historyFirst published December 1986Second edition November 1990Third edition August 1997Fourth edition September 1997Fifth (present) edition April 2016Amendments issued since pu

4、blicationDate Text affectedSeptember 2016 C1 See ForewordFebruary 2017 C2 Correction to Clause 16 numberingBS 6724:2016 BRITISH STANDARDContentsForeword iii1 Scope 12 Normative references 13 Terms and definitions 24 Rated voltage 35 Conductors 46 Insulation 47 Identification of cores 58 Laying-up 69

5、 Bedding 610 Armour 711 Oversheath 812 Cable marking and additional information 913 End sealing 1114 Schedule of tests 1215 Test conditions 1316 Routine tests 1317 Sample tests 1418 Type tests 15AnnexesAnnex A (informative) Guide to use and installation of cables 23Annex B (normative) Armour wire te

6、sts 30Annex C (normative) Compatibility test 32Annex D (normative) Abrasion resistance test 32Annex E (normative) Insulation resistance constant test on oversheath 33Annex F (normative) Resistance of conductor and armour 34Annex G (informative) Gross cross-sectional area of armour 36Annex H (normati

7、ve) Test for shrinkage of oversheath on cable 37Annex I (informative) Guidance on type tests 38Annex J (informative) United Kingdom reference codes 41Bibliography 42List of figuresFigure1Anexample of the marking on the oversheath of the cable 10List of tablesTable 1 Maximum permitted voltages agains

8、t rated voltage of cable 3Table 2 Diameter of steel armour wire and mass of zinc coating 7Table 3 Schedule of tests 12Table 4 Single-core 600/1 000 V cables with copper conductors 17Table5Two-core 600/1 000 V cables with copper conductors 18Table 6 Three-core 600/1 000 V cables with copper conductor

9、s 19Table 7 Four-core 600/1 000 V cables with copper conductors 20Table 8 Five-core 600/1 000 V cables with copper conductors 21Table 9 Multicore auxiliary 600/1 000 V cables with copper conductors 21Table 10 Single-core 1 900/3 300 V cables with copper conductors 22Table 11 Three-core 1 900/3 300 V

10、 cables with copper conductors 22Table A.1 Selection of cables for a.c. systems 24Table A.2 Test voltages after installation 29Table B.1 Temperature correction multiplication factors 31Table C.1 Compatibility requirements 32BRITISH STANDARD BS 6724:2016 The British Standards Institution 2017 iTable

11、D.1 Vertical load requirements 33Table F.1 Maximum resistance of conductor and armour for single-corecable 34Table F.2 Maximum resistance of conductor and armour for two-, three-,four- and five-core cable 35Table F.3 Maximum resistance of conductor and armour for 600/1 000 Vmulticore auxiliary cable

12、s 35Table G.1 Gross cross-sectional area of armour wires for thesingle-core 600/1 000 V cable 36Table G.2 Gross cross-sectional area of armour wires for the two-, three-,four- and five-core 600/1 000 V cable 36Table G.3 Gross cross-sectional area of armour wires for 600/1 000 V multicoreauxiliary ca

13、ble 37Table I.1 Test schedule for the smoke emission test 40Table J.1 Historical cable codes included in BS 6724 41Summary of pagesThis document comprises a front cover, an inside front cover, pages i to iv,pages 1 to 42, an inside back cover and a back cover.BRITISH STANDARDBS 6724:2016ii The Briti

14、sh Standards Institution 2017ForewordPublishing informationThis British Standard is published by BSI Standards Limited, under licence fromThe British Standards Institution, and came into effect on 30 April 2016. It wasprepared by Subcommittee GEL/20/17, Low voltage cables, under the authorityof Tech

15、nical Committee GEL/20, Electric cables. A list of organizationsrepresented on these committees can be obtained on request to their secretary.SupersessionThis British Standard supersedes BS 6724:1997+A3:2008, which will be withdrawnon 30 April 2017.Information about this documentThis is a full revis

16、ion of the standard, and introduces the following principalchanges.a) The range of cable types is restricted to cables with copper conductors.b) The marking requirements have been updated and clarified.c) Test methods have been updated in accordance with the latestBS EN standards.d) 48-core auxiliar

17、y cables have been removed as they are no longer marketrelevant.The new edition takes account of: BS EN 50363 (replacing certain parts of BS 7655) on materials; BS EN 50395 (replacing Annex K of BS 6724:1997) on electrical tests; BS EN 50396 (replacing Annex D of BS 6724:1997) on thicknessmeasuremen

18、t; BS EN 60332-1-2 (replacing BS EN 50265-2-1); BS EN 60332-3-24 (replacing BS EN 50266-2-4); and BS EN 62230 (replacing BS EN 50356) on spark testing.Product certification/inspection/testingUsers of this British Standard are advised to consider the desirability ofthird-party certification/inspectio

19、n/testing of product conformity with this BritishStandard. Users seeking assistance in identifying appropriate conformityassessment bodies or schemes may ask BSI to forward their enquiries to therelevant association.Hazard warningsWARNING. This British Standard calls for the use of substances and/or

20、procedures that can be injurious to health if adequate precautions are nottaken. It refers only to technical suitability and does 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

21、that theexecution of its provisions will be entrusted to appropriately qualified andexperienced people, for whose use it has been produced.BRITISH STANDARD BS 6724:2016 The British Standards Institution 2017 iiiText introduced or altered by Corrigendum No. 1 is indicated in the text by tags. Minor e

22、ditorial corrections are not tagged.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 i

23、nsmaller italic type, and does not constitute a normative element.Contractual and legal considerationsThis publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity fr

24、om legalobligations.BRITISH STANDARDBS 6724:2016iv The British Standards Institution 20171 ScopeThis British Standard specifies requirements for the construction andperformance of thermosetting insulated, armoured cables of rated voltagesof 600/1 000 V and 1 900/3 300 V, having low emission of smoke

25、 and corrosivegases when affected by fire.NOTE 1 Other thermosetting insulated, armoured cables for voltages of 600/1 000 Vand 1 900/3 300 V can be found in BS 5467, but these do not have low levels ofemission of smoke and corrosive products under exposure to fire.This British Standard is applicable

26、 to cables for use in fixed installations inindustrial areas, buildings or similar applications.This British Standard specifies requirements for the following types of cables:a) 600/1 000 V cables, wire armoured and oversheathed having single-core,two-, three-, four- and five-core stranded copper co

27、nductor;b) 600/1 000 V multicore auxiliary cables, wire armoured, and oversheathed,stranded copper conductor; andc) 1 900/3 300 V cables, wire armoured and oversheathed, having single-coreor three-core stranded copper conductor.This British Standard is applicable to cables that are designed for a ma

28、ximumsustained conductor temperature of 90 C and for a maximum short-circuitconductor temperature of 250 C (for a maximum of 5 s).NOTE 2 Limitation on the temperature of the cables may be imposed in situationswhere they might be touched or where they could touch other materials.NOTE 3 Annex A gives

29、a guide to the use and installation of cables, Annex B givesarmour wire tests, Annex C gives a compatibility test, Annex D gives an abrasionresistance test, Annex E gives an insulation resistance constant test on oversheath,Annex F gives the resistance of conductor and armour, Annex G gives the gros

30、scross-sectional area of armour, Annex H gives a test for shrinkage of oversheath oncable, Annex I gives guidance on type tests and Annex J gives the standard UnitedKingdom reference codes.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in thisdocument

31、and are indispensable for its application. For dated references, onlythe edition cited applies. For undated references, the latest edition of thereferenced document (including any amendments) applies.BS 7655-1.2, Specification for insulating and sheathing materials for cables Part 1: Cross-linked el

32、astomeric insulating compounds Section 1.2:General 90 C applicationBS 7655-1.3, Specification for insulating and sheathing materials for cables Part 1: Elastomeric insulating compounds Section 1.3: XLPEBS 7655-6.1, Specification for insulating and sheathing materials for cables Part 6: Thermoplastic

33、 sheathing compounds having low emission of corrosivegases, and suitable for use in cables having low emission of smoke whenaffected by fire Section 6.1: General application thermoplastic typesBS EN 10244-2:2009, Steel wire and wire products Non-ferrous metalliccoatings on steel wire Part 2: Zinc or

34、 zinc alloy coatingsBS EN 50363-5, Insulating, sheathing and covering materials for low voltageenergy cables Part 5: Halogen-free, cross-linked insulating compoundsBS EN 50395, Electrical test methods for low voltage energy cablesBRITISH STANDARD BS 6724:2016 The British Standards Institution 2017 1

35、BS EN 50396, Non electrical test methods for low voltage energy cablesBS EN 60228, Conductors of insulated cablesBS EN 60229, Electric cables Tests on extruded oversheaths with a specialprotective functionBS EN 60332-1-2:2004+A1:2015, Tests on electric and optical fibre cables underfire conditions P

36、art 1-2: Test for vertical flame propagation for a singleinsulated wire 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 for vertical flame spread of vertically-mountedbunched wires or cables Category CB

37、S EN 60754-1, Test on gases evolved during combustion of materials fromcables Part 1: Determination of the halogen acid gas contentBS EN 60811-401, Electric and optical fibre cables Test methods fornon-metallic materials Part 401: Miscellaneous tests Thermal ageing methods Ageing in an air ovenBS EN

38、 60811-501, Electric and optical fibre cables Test 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: Mech

39、anical tests Shrinkage test forinsulationBS EN 61034-2, Measurement of smoke density of cables burning under definedconditions Part 2: Test procedure and requirementsBS EN 62230, Electric cables Spark-test methodBS EN ISO 6892-1, Metallic materials Tensile testing Part 1: Method of test atambient te

40、mperatureIEC 60050-461, International electrotechnical vocabulary Part 461: Electriccables3 Terms and definitionsFor the purposes of this British Standard, the terms and definitions given inIEC 60050-461 and the following apply.3.1 cable manufacturerorganization that has the capability to both produ

41、ce and control the conformityof cable made to this British StandardNOTE See 12.1a) for information on marking the cable with the cablemanufacturers name and identifier.3.2 length of layaxial length of one complete turn of the helix formed by one cable component3.3 tests3.3.1 routine tests, Rtests ma

42、de on all production cable lengths to demonstrate their integrity3.3.2 sample tests, Stests made on samples of completed cable, or components taken from acompleted cable, adequate to verify that the product meets the designspecificationsBRITISH STANDARDBS 6724:20162 The British Standards Institution

43、 20173.3.3 type tests, Ttests made before supplying, on a general commercial basis, a type of cablecovered by this British Standard, in order to demonstrate satisfactoryperformance characteristics to meet the intended applicationNOTE Type tests are of such a nature that after they have been made, th

44、ey neednot be repeated unless changes are made in the cable materials, design or type ofmanufacturing process, which might change the performance characteristics.3.4 values3.4.1 approximate valuevalue which is only indicativeNOTE Values described as “approximate” do not constitute requirements to be

45、checked by measurement.3.4.2 nominal valuevalue by which a quantity is designatedNOTE Nominal values usually give rise to values to be checked by measurementstaking into account specified tolerances.3.5 voltages3.5.1 maximum voltage, Ummaximum sustained power-frequency voltage between phase conducto

46、rs forwhich the cable is suitable3.5.2 rated voltage, U0nominal power-frequency voltage between conductor(s) and earth for which thecable is suitable3.5.3 rated voltage, Unominal power-frequency voltage between phase conductors for which thecable is suitable4 Rated voltageThe cables shall be designa

47、ted by the rated voltages, U0and U, expressed in theform U0/U.The rated voltages recognized for the purposes of this standard shallbe 600/1 000 V and 1 900/3 300 V.NOTE The maximum permitted operating voltages of the system are stated inTable 1.Table 1 Maximum permitted voltages against rated voltag

48、e of cableRated voltage ofcableMaximum permitted operating voltage of the systema.c. d.c.U0/U Conductor-earth,U0maxConductor-conductor, UmConductor-earth Conductor-conductorVV V V V600/1 000 700 1 200 900 1 8001 900/3 300 2 100 3 600 2 700 5 400NOTE Guidance on the selection of cables of appropriate

49、 voltage designations for particular systems is givenin A.4.BRITISH STANDARD BS 6724:2016 The British Standards Institution 2017 3In an alternating current system, the rated voltage of the cable shall be at leastequal to the nominal voltage of the system for which it is intended.5 ConductorsThe conductors shall be annealed copper, circular or shaped, as given inTable 4 to Table 11 inclusive, and shall conform to the requirements ofBS EN 60228, Cla