1、Designation:D 4247 99(Reapproved 2004)An American National StandardStandard Specification forGeneral-Purpose,Black Heavy-Duty,and Black Extra-Heavy-Duty Crosslinked Polychloroprene Jackets for Wire andCable1This standard is issued under the fixed designation D 4247;the number immediately following t
2、he designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers cro
3、sslinked polychloroprenecompounds suitable for use as outer coverings or jackets onelectrical cables for general-purpose,black heavy-duty andblack extra-heavy-duty service.1.2 These jackets are not recommended for installation at atemperature lower than-25 C.1.3 Whenever two sets of values are prese
4、nted,in differentunits,the values in the first set are the standard,while those inparentheses are for information only.2.Referenced Documents2.1 ASTM Standards:2D 470 Test Methods for Crosslinked Insulations and Jacketsfor Wire and CableD 1711 Terminology Relating to Electrical Insulation3.Terminolo
5、gy3.1 DefinitionsFor definitions of terms used in this speci-fication refer to Terminology D 1711.3.2 Definitions of Terms Specific to This Standard:3.2.1 aging(act of),nexposure of materials to air at 100C for 168 h or oil at 121 C for 18 h.4.Physical Properties4.1 The jacket shall conform to the r
6、equirements for physi-cal properties prescribed in Table 1.5.Sampling5.1 Sample the jacket in accordance with Test MethodsD 470.6.Test Methods6.1 Test the jacket in accordance with Test Methods D 470.7.Keywords7.1 crosslinked jacket;extra-heavy-duty jacket;general-purpose jacket;heavy-duty jacket;po
7、lychloroprene jacket;rubber jacket1This specification is under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Insulating Materials and is the direct responsibility ofSubcommittee D09.18 on Solid Insulations,Non-Metallic Shieldings,and Cover-ings for Electrical and Telecommunicati
8、ons Wires and Cables.Current edition approved April 10,1999.Published June 1999.Originallyapproved in 1983.Last previous edition approved in 1995 as D 4247 95.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTM
9、Standards volume information,refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.NOTICE:This standard has either been superseded and replaced by a new version or withdrawn.Contac
10、t ASTM International(www.astm.org)for the latest informationASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard.Users of this standard are expressly advised that determination of the validity of any such pat
11、ent rights,and the riskof infringement of such rights,are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised,either reapproved or withdrawn.Your comments are invited either
12、for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters.Your comments will receive careful consideration at a meeting of theresponsible technical committee,which you may attend.If you feel that your comments have not received a fair hearing
13、 you shouldmake your views known to the ASTM Committee on Standards,at the address shown below.This standard is copyrighted by ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.Individual reprints(single or multiple copies)of this standard may be obta
14、ined by contacting ASTM at the aboveaddress or at 610-832-9585(phone),610-832-9555(fax),or serviceastm.org(e-mail);or through the ASTM website(www.astm.org).TABLE 1 Physical PropertiesAPhysical PropertyGeneral-PurposeHeavy-DutyExtra-Heavy-DutyUnaged Requirements:Tensile strength,min,psi(MPa)1500(10.
15、3)1800(12.4)2400(16.5)Tensile stress at 200%elongation,min,psi(MPa).500(3.4)700(4.8)Elongation at rupture,min,%250300300Tension setB,max,%303030Tear,min,lbf/in.(kN/m).40(7)Aged Requirements:After air-oven test at 100 6 1 C for 168 h:Tensile strength,min,%of unaged value505050Elongation at rupture,mi
16、n,%of unaged value505050After oil-immersion test at 121 6 1C for 18 h:Tensile strength,min,%of unaged value606060Elongation at rupture,min,%of unaged value606060AValues specified are applicable only to jackets having a nominal wall thickness of 0.030 in.(0.76 mm)or greater.BSet in 2-in.(50-mm)gage length.D 4247 99(2004)2
