1、Designation:D230807(Reapproved 2020)1Standard Specification forThermoplastic Polyethylene Jacket for Electrical Wire andCable1This standard is issued under the fixed designation D2308;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,t
2、he year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1NOTEEditorially corrected Table 2 October 2020.1.Scope1.1 This specification covers a thermoplastic jacketing com-pound fo
3、r 2 to 35 kV wire and cable,of at least 0.030 in.(0.76mm)nominal thickness,consisting substantially of pigmentedpolyethylene.1.2 In many instances the jacket material cannot be testedunless it has been formed around a conductor or cable.Therefore,tests done on jacketed wire and cable in thisspecific
4、ation are solely to determine the relevant property ofthe jacket material and not to test the jacketed conductor orcompleted cable.1.3 Whenever two sets of values are presented,in differentunits,the values in the first set are the standard,while those inparentheses are for information only.1.4 This
5、international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT
6、)Committee.2.Referenced Documents2.1 ASTM Standards:2D1248 Specification for Polyethylene Plastics ExtrusionMaterials for Wire and CableD1693 Test Method for Environmental Stress-Cracking ofEthylene PlasticsD1711 Terminology Relating to Electrical InsulationD2633 Test Methods for Thermoplastic Insul
7、ations andJackets for Wire and CableD3349 Test Method for Absorption Coefficient of EthylenePolymer Material Pigmented with Carbon Black3.Terminology3.1 Definitions:3.1.1 Refer to Terminology D1711 for definitions of termsused in this specification.3.2 Definitions of Terms Specific to This Standard:
8、3.2.1 aging,(act of),nexposure of materials to air at 100C for either 24 or 48 h.4.Physical Properties4.1 The polyethylene before application to the wire or cableshall comply with the requirements for Type I,Class C,Category 4 or 5,Grade E5 or J3 of Specification D1248,orClass B with equivalent weat
9、hering requirements to Class Cmaterials.The requirements of Specification D1248 shall notapply to the jacket removed from the wire or cable.Thecompound is suitable for exposure to sunlight and otheratmospheric environments at temperatures between 55and+75 C,and a minimum installation temperature of
10、40C.4.2 Specimens removed from the wire or cable and tested at20 to 28 C(68 to 82 F)shall conform to the requirements forphysical properties specified in Table 1.Alternatively,thejacket shall be air-oven aged without removal from theconductor.4.3 Environmental Stress-Cracking TestThe jacket shallcon
11、form to the requirements for Grade E5 as specified inTable 3 of Specification D1248.4.4 Absorption CoeffcientSee Test Method D3349.In-stead of testing the jacket removed from the conductors,acertification by the polyethylene compound manufacturer thatthis requirement has been complied with shall suf
12、fice.5.Electrical Properties5.1 The polyethylene jacket shall conform to the require-ments for electrical properties specified in Table 2.1This specification is under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Insulating Materials and is the direct responsibility ofSubcommitt
13、ee D09.07 on Electrical Insulating Materials.Current edition approved Aug.1,2020.Published September 2020.Originallyapproved in 1964.Last previous edition approved in 2007 as D2308 07(2013).DOI:10.1520/D2308-20E02.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Cust
14、omer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in
15、 accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.6.Sampling6.1 Unless otherwise
16、 instructed,sample the jacket in accor-dance with Test Methods D2633.7.Test Methods7.1 Unless otherwise instructed,test the jacket in accor-dance with Test Methods D2633.7.2 Environmental Stress-Cracking Test Test in accor-dance with Test Method D1693,Condition A,using undilutedIgepal CO 630 as specified in Specification D1248.7.3 Absorption CoeffcientTest in accordance with TestMethod D3349.8.Retest8.1 If all of the specimens pass the test described,the lot ofcable that they represent shall be
