BS 8573-2012 Electric cables Thermosetting insulated non-armoured cables with a voltage of 600 1 000V for fixed installations having low emissions of smoke and corrosive gases when.pdf

1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS 8573:2012Electric cables Thermosetting insulated,non-armoured cables with avoltage of 600/1 000 V, forfixed installations, andhaving low emission ofsmoke and corrosive gaseswh

2、en affected by firePublishing and copyright informationThe BSI copyright notice displayed in this document indicates when the documentwas last issued. The British Standards Institution 2012Published by BSI Standards Limited 2012ISBN 978 0 580 75013 7ICS 29.060.20The following BSI references relate t

3、o the work on this standard:Committee reference GEL/20/17Draft for comment 12/30244462 DCPublication historyFirst published October 2012Amendments issued since publicationDate Text affectedBS 8573:2012 BRITISH STANDARDContentsForeword ii1 Scope 12 Normative references 13 Terms and definitions 24 Rat

4、ed voltage 35 Conductors 46 Insulation 47 Identification of cores 58 Laying-up 59 Extruded optional inner covering 610 Sheath 711 Cable marking and additional information 712 Schedule of tests 913 Test conditions 1114 Routine tests 1115 Sample tests 1116 Type tests 12AnnexesAnnex A (informative) Gui

5、de to use 17Annex B (normative) Test for shrinkage of sheath on cable 20Annex C (normative) Compatibility test 21Annex D (normative) Abrasion test 22Annex E (informative) Notes on type tests 23Annex F (normative) Green-and-yellow measurement for shaped conductors 25Bibliography 27List of figuresFigu

6、re1Anexample of the marking as used on the outer sheath of thecable 9Figure F.1 Measurement of green-and-yellow for shaped conductors 26List of tablesTable 1 Schedule of tests 10Table 2 Single-core 600/1 000 V cables with circular stranded copperconductor 13Table3Two-core 600/1 000 V cables with str

7、anded copper conductors 14Table 4 Three-core 600/1 000 V cables with stranded copper conductors 15Table 5 Four-core 600/1 000 V cables with stranded copper conductors 16Table 6 Five-core 600/1 000 V cables with stranded copper conductors 16Table A.1 Minimum installation radius 19Table C.1 Compatibil

8、ity requirements 22Table D.1 Vertical load requirements 22Table E.1 Test schedule for the smoke emission test 24Summary of pagesThis document comprises a front cover, an inside front cover, pages i to ii,pages 1 to 28, an inside back cover and a back cover.BRITISH STANDARD BS 8573:2012 The British S

9、tandards Institution 2012 iForewordPublishing informationThis British Standard is published by BSI Standards Limited, under licence fromThe British Standards Institution, and came into effect on 31 October 2012. Itwas prepared by Subcommittee GEL/20/17, Low voltage cables, under theauthority of Tech

10、nical Committee GEL/20, Electric cables. A list of organizationsrepresented on this committee can be obtained on request to its secretary.Relationship with other publicationsBS 8573 is related to, but not equivalent to, IEC 60502-1.Information about this documentBS 8573 is a new standard, catering f

11、or important changes in the market. It isrequired for those sectors, especially buildings of high public occupancy and/oraccess, where it is necessary to restrict both the spread of flames and the releaseof smoke and harmful gases in the case of fire.This British Standard reflects the revision of BS

12、 7889 for matters not related tofire performance.In the preparation of BS 8573, GEL/20/17 has requested that references to otherstandards for which the committee is responsible are undated, even if referringto a specific clause. It is the committees intention not to amend thefundamentals (e.g. claus

13、e numbers, material type designation) in any of thesestandards and so the latest edition applies.Product certification/inspection/testing. Users of this British Standard are advisedto consider the desirability of third-party certification/inspection/ testing ofproduct conformity with this British St

14、andard. Users seeking assistance inidentifying appropriate conformity assessment 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 adequ

15、ate 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.Presentational conventionsThe provisions of this standard are presented in roman (i.e. upright) type. Itsrequirements are expressed in

16、sentences in which the principal auxiliary verb is“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 include all the necessary provis

17、ions of acontract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legalobligations.BRITISH STANDARDBS 8573:2012ii The British Standards Institution 20121 ScopeThis British Standard specifies requirements and test methods for theconstr

18、uction and performance of non-armoured cables with thermosettinginsulation of rated voltages 600/1 000 V which, when assessed by the specifiedtests, produce lower levels of smoke and corrosive products under exposure tofire compared with cables conforming to BS 7889.NOTE 1 These tests are published

19、in separate British Standards to which reference ismade at the appropriate point in the text. The Scope clauses of these BritishStandards contain cautionary notes concerning the applicability of such tests, andthese should be taken into account when assessing the suitability of cables specifiedin th

20、is British Standard for use in a particular application.Cables specified in this British Standard are intended for use in fixed installationsin industrial areas, buildings and similar applications but not for burial in theground, either directly or in ducts.The cables specified in this British Stand

21、ard are all stranded copper conductor,thermosetting insulated, thermoplastic sheathed types. There are single-coretypes and multi-core types (2-, 3-, 4- and 5-core).In this standard, the level of corrosive (and acid) gases is determined bymeasurement of hydrochloric acid (HCl) in accordance with BS

22、EN 50267-2-1.NOTE 2 These are indirect assessment methods, and reference should be made toIEC/TS 60695-5-2:2002, 5.1.5, for additional guidance.The insulation and other components are suitable to permit operation of thecables at a maximum sustained conductor temperature of 90 C and for amaximum shor

23、t-circuit conductor temperature of 250 C (for a maximum periodof 5 s).NOTE 3 Limitation on the temperature of the cables may be imposed in situationswhere they could be touched, or where they could touch other materials.NOTE 4 In installations that include wiring accessories, junction boxes andconsu

24、mer units etc., the performance of these accessories should be taken intoaccount in deciding the maximum operating temperature of the cable.NOTE 5 Annex A gives guidance on the use of these cables. Annex B gives the testfor shrinkage of sheath on cable. Annex C gives the compatibility test. Annex D

25、givesthe abrasion test. Annex E contains notes on type tests, and Annex F givesgreen-and-yellow measurement for shaped conductors.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in thisdocument and are indispensable for its application. For dated refere

26、nces, onlythe edition cited applies. For undated references, the latest edition of thereferenced document (including any amendments) applies.BS 5099, Electric cables Voltage levels for spark testingBS 7655-1.2, Specification for insulating and sheathing materials for cables Part 1: Cross-linked elas

27、tomeric insulating compounds Section 1.2: General90 C applicationBS 7655-1.3, Specification for insulating and sheathing materials for cables Part 1: Cross-linked elastomeric insulating compounds Section 1.3: XLPEBS 7655-6.1, Specification of insulating and sheathing materials for cables Part 6: The

28、rmoplastic 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 typesBRITISH STANDARD BS 8573:2012 The British Standards Institution 2012 1BS EN 50267-2-1, Common tes

29、t methods for cables under fire conditions Testson gases evolved during combustion of materials from cables Part 2-1: Procedures Determination of the amount of halogen acid gasBS EN 50363-5, Insulating, sheathing and covering materials for low voltageenergy cables Part 5: Halogen-free, cross-linked

30、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 60229, Electric cables Tests on extruded oversheaths with a specialprotective functionBS EN 603

31、32-1-2:2004, Tests on electric and optical fibre cables under fireconditions Part 1-2: Test for vertical flame propagation for a single smallinsulated 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: Tes

32、t 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: Miscellaneous tests Thermal ageingmethods Ageing in an air ovenBS EN 60811-501, Electric and optical fibre cables Tes

33、t 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 6

34、0811-503, Electric and optical fibre cables Test methods fornon-metallic materials Part 503: Mechanical tests Shrinkage test for sheathsBS EN 61034-2, Measurement of smoke density of cables burning under definedconditions Part 2: Test procedure and requirementsBS EN 62230, Electric cables Spark-test

35、 methodIEC 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 produce

36、 and control the conformityof cable made to this British StandardNOTE See 11.1a) 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 routine tests, Rtests made on all pro

37、duction cable lengths to demonstrate their integrityBRITISH STANDARDBS 8573:20122 The British Standards Institution 20123.4 sample tests, Stests made on samples of completed cable, or components taken from acompleted cable, adequate to verify that the product meets the designspecifications3.5 type t

38、ests, 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 These tests are of such a nature that after they have been made, they neednot be re

39、peated unless changes are made in the cable materials, design or type ofmanufacturing process, which might change the performance characteristics.3.6 values3.6.1 approximate valuevalue which is only indicativeNOTE Values described as “approximate” do not constitute requirements to bechecked by measu

40、rement.3.6.2 nominal valuevalue by which a quantity is designatedNOTE Nominal values usually give rise to values to be checked by measurementstaking into account specified tolerances.3.7 voltage3.7.1 maximum voltage, Ummaximum sustained power-frequency voltage between phase conductors forwhich the c

41、able 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

42、voltages U0and U, expressed in theform U0/U.The rated voltage recognized for the purposes of this standard shall be600/1 000 V.The maximum designated voltage (Um) for the purposes of this standard for600/1 000 V cable shall be 1 200 V.In an alternating current system, the rated voltage of a cable sh

43、all be at leastequal to the nominal voltage of the system for which it is intended.NOTE Guidance on the selection of cables of appropriate voltage designations forparticular systems is given in A.4.BRITISH STANDARD BS 8573:2012 The British Standards Institution 2012 35 ConductorsThe conductors shall

44、 be annealed copper as given in Table 2 to Table 6 inclusive,and shall conform to the requirements of BS EN 60228, Class 2.NOTE The category of test for this requirement, and for all others in this standard,is shown in Table 1, “Schedule of tests”.6 Insulation6.1 Type of insulationThe insulation sha

45、ll be type GP 8 conforming to BS 7655-1.3, or type GP 6conforming to BS 7655-1.2, or type EI 5 conforming to BS EN 50363-5. For theassessment of halogens on the insulation taken from a completed cable, only 6.4shall apply.NOTE Other tests for assessment of halogens, for instance to BS EN 50267-2-2 a

46、ndBS EN 60684-2, are not required.6.2 ApplicationThe insulation shall be applied by an extrusion process and cross-linked to forma compact and homogeneous layer.NOTE 1 The insulation can be applied in a single layer, or in a number of cohesivelayers.Where more than one layer is used, the complete in

47、sulation shall be tested asthough it were a single layer.NOTE 2 Insulation applied in more than one layer does not conform to thedefinition of double insulation given, for instance, in BS 7671.The manufacturer shall have the option to apply a tape or tapes over theconductor or insulation. These tape

48、s shall not be included as part of theinsulation.It shall be possible to remove the insulation easily without damage to theinsulation itself or to the conductor.6.3 Thickness of insulationThe mean value of the radial thickness of the insulation, when measured inaccordance with BS EN 50396, 4.1, shal

49、l be not less than the value given inTable 2 to Table 6. The smallest value measured, tm, shall not fall below 90% ofthe value given in Table 2 to Table 6 by more than 0.1 mm, i.e.:tm0.9tn 0.1where:tmis the smallest value measured, in millimetres (mm);tnis the tabulated radial thickness, in millimetres (mm).6.4 Corrosive and acid gas emission of insulation and tape(s)When tested in accordance with BS EN 50267-2-1, the level of HCl shall be notgreater than 0.5%.BRITISH STANDARDBS 857