1、AMERICANNATIONALANSI/ASTM0755-80STANDARDAMERICANSOCIETYFORTESTINGANOMATERIALS1916 RaceSt.,Philadelphia,Pa.19103ReprintedfromtheAnnualBookofASTMStandards,CopyrightASTMIfnotlistedinthecurrentcombinedindex,willappearinthenextedition.StandardSpecificationforSYNTHETIC RUBBER INSULATIONFORWIRE AND CABLE,6
2、0COPERATIONThis standardisissued under the fixed designallon07SS;the number immediately following the deslgnallon indICates theyearofongInal adoption or.Inthe caseofrevision.the yearoflastreVISIOn.A numberinparentheses indicates the year oflastreapproval.l.Scope1.1This specification covers a vulcani
3、zedrubber insulating compound for electrical wiresandcables.The rubber polymer shall consistsubstantiallyofsynthetic rubber.1.2This typeofinsulationissuitable forcontinuous operation at conductor tempera-tures up to 60C and operating voltages notexceeding 2000V.This insulation may havelow-temperatur
4、e limitations,and the manufac-turer should be consulted for specific recom-mendations for a particular installation.2.Applicable Document2.1ASTMStandard:0470Testing Thermosetting InsulatedandJacketedWi.reand Cable23.Pbysical Requirements3.1The vulcanized insulation shall conformto the requirements f
5、or physical propertiesspecified in TableI.3.2ThicknessofInsulation-Theaveragethicknessofinsulation shall be not lessthanthat given in TablelAofMethods0470.Theminimum thickness shall be not less than 90%ofthe specified thickness.4.Electrical Requirements4.1A-CVoltageTest-Eachinsulated con-ductor shal
6、l withstand for 5 min the a-c testvoltage given for other than ozone-resistinginsulations in TablelAofMethods0470,unless the d-c test described in4.3isperformed.4.2InsulationResistance-Theinsulatedconductor shall have an insulation-resistancevalueofnot less than that corresponding to aconstantof2000
7、 at 60F(15.6C).When thetemperature at which the insulationistesteddiffers from60F(l5.6C),the measured valueobtained shall be multipliedbythe proper cor-rection factor from Table 2ofMethods0470,using the coefficient furnished by the manufac-turer for his particular compound as previouslydeterminedbyM
8、ethods0470.4.2.1Where an insulated conductoriscov-ered with a nonmetallic jacketsothat the in-sulation resistance can be measured only on thecompleted assembly,the required insulationresistance shallbenotlessthan 60%ofthatrequired for the primary insulation based onthe thicknessofthat insulation.4.3
9、D-C VoltageTest-Uponcompletionofthe insulation resistance test,each insulatedconductor shall withstand for 5 min the d-c testvoltage given for other than ozone-resistinginsulations in Table 1BofMethods0470,unless the a-c test described in4.1isperformed.5.WaterAbsorption5.1When requested by the purch
10、aser,theWater Absorption Test(non-accelerated)de-scribed in Methods0470shall be made.Theinsulation shall conformtothe requirements inTable2.6.Test Metbods6.1Test the insulation in accordance withMethods0470.IThis specificationisunder the jurisdictionofASTMCommittee0-9on Electrical Insulating Materia
11、ls andisthedirect responsibilityofSubcommillee 009.18 on ElastomericInsulation on Cables.Current edition approved Jan.3.1980.Published March1980.Originally publishedas07SS-43T.Last previousedition 07SS-74.JAnnual BookojASTMStandards.Part 40.NOTICE:This standard has either been superseded and replace
12、d by a new version or discontinued.Contact ASTM International(www.astm.org)for the latest information.410755TABLEIPhysicalTestRequir_ntsfOCPerf_ue:eGradeSynthetic Rubber Insulation.6OC Operation Physical Requirements:Tensile strength.min.psi(MPa)Elongationatrupture.min.%Aging Requirements:AfterOxyge
13、nPressureTestat10Iefor%h:Tensile strength.min.percentageofunagedvalueElongauon.min.percentageofunagedvalueA100(4.8)3007565B600(4.1)2501565.Whentest specimens are taken from fmished cableshaving rubberorother thermoselling sbeaths.tbe values fororiginal and aged physical properties shall be as specif
14、ied inColumnB.Thevalues specified are applicable only10insulationhaving a nominal wall thicknessof30 mils(0.16 mm)orgreater.TABLE2WaterAbsOCptioDRequire_ntsPermillivity afterIday.maxIncrease in permittivity.max,%:Ito14days1to14days6205TMAmerican SocietyforTesting and Materials takesnoposition respec
15、ting the validityofany patent rights asJtrtedinconnection with any item mentionedin this standard.Usersofthis standardartexpressly advised Ihal delermination0lthevalidily01any such palent righls.andIherisk 01inlringement01suchrighlS.are enlire(v Iheir own responsibility.This standard is subjecl10rev
16、ision at any timebythe responsible lechnical commilleeandmuslbe reviewedeveryfive yearsandifnot revistd.eitherreapprovedor wilhdrawn.Your comments are inviledeitherlorrevisionofIhis standardorloradditionalstandardsandshouldbeaddressed toASTMHeadquarters.Your comments willreceivecart/ul consideration al ameetingollheresponsible technicalcommilltt,whichyoumayallend.Ifyouleellhatyour commentshave notreceivedalairhearingvou shouldmakeyour views knownrotheASTMCommillee on Standards.1916Race SI.Philad
