ASTM_D_2220_-_11.pdf

Designation:D222011Standard Specification forPoly(Vinyl Chloride)Insulation for Wire and Cable,75COperation1This standard is issued under the fixed designation D2220;the number immediately following the 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()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This specification covers a thermoplastic insulation ofpoly(vinyl chloride)or the copolymer of vinyl chloride andvinyl acetate.1.2 This insulation is recommended for use in power andcontrol circuits at temperatures not higher than 75C.At athickness of 15 mils(0.38 mm),application is limited tovoltage ratings below 300 V,and to dry locations.At athickness of 30 mils,the application range is widened to dry orwet applications,and to a voltage rating of 600 V.1.3 In many instances the insulation material cannot betested unless it has been formed around a conductor or cable.Therefore,tests are done on insulated wire or cable in thisspecification solely to determine the relevant property of theinsulation material and not to test the conductor or completedcable.1.4 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.4.1 In come cases(including the title),temperatures aredescribed in degrees Celsius only.2.Referenced Documents2.1 ASTM Standards:2D1711 Terminology Relating to Electrical InsulationD2633 Test Methods for Thermoplastic Insulations andJackets for Wire and Cable3.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this specification,referto Terminology D1711.3.2 Definitions of Terms Specific to This Standard:3.2.1 aging(act of),nexposure of materials to air or oil ata temperature and a time as specified in Table 1.4.Physical Properties4.1 The insulation shall conform to the requirements forphysical properties prescribed in Table 1.5.Electrical Requirements5.1 Perform the ac voltage,insulation resistance,and dcvoltage tests in that order when any of these tests are required.The sequence for other testing is not specified.5.2 AC Voltage TestTest the insulated conductor at the acwithstand voltage as specified in Table 2.Unless otherwisespecified,omit this test if the dc withstand voltage testdescribed in 5.4 is performed.5.2.1 For cables or conditions of service where mechanicalstresses govern,such as in submarine cables or long verticalrisers,it is possible that the minimum conductor sizes in Table2 are not strong enough.5.2.2 The thicknesses given in Table 2 apply to aerial cablesand to single conductors installed in conduits above ground andto the individual conductors of all multiple-conductor cableshaving a common jacket metallic sheath or protective coveringover the assembly,except as shown in 5.2.2.1.5.2.2.1 For single-conductor cables for installation in under-ground ducts or direct earth burial,add 15 mils(0.38 mm)tothe insulation thicknesses given in Table 2 when such cables donot have a thermoplastic jacket or metallic sheath over theassembly.5.2.3 Where the thickness of the insulation is increased formechanical reasons or for special service conditions,determinethe test voltage in Table 2 by the size of the conductor and therated voltage.5.3 Insulation Resistance:5.3.1 Insulated conductors in sizesAWG 14(2.08 mm2)andlarger shall have an insulation resistance of at least thatcorresponding to a constant of 2000 M-1000 ft at 60F(15.6C).1This 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 Coveringsfor Electrical and Telecommunication Wires and Cables.Current edition approved Aug.1,2011.Published August 2011.Originallyapproved in 1963.Last previous edition approved in 2007 as D2220 02(2007)1.DOI:10.1520/D2220-11.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.3.2 If the temperature at the time measurement was madediffers from 60F(15.6C),correct the insulation resistance to60F by multiplying the measured value by the proper correc-tion factor from Table 1,Temperature Correction Factors forInsulation Resistance at 60F,of Methods D2633.5.4 DC Voltage TestUpon completion of the insulationresistance test,test each non-shielded insulated conductor for 5min at a dc withstand voltage which is three times the ac testvoltage specified in Table 2.Unless othe