Designation:D470−21StandardTestMethodsforCrosslinkedInsulationsandJacketsforWireandCable1ThisstandardisissuedunderthefixeddesignationD470;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thesetestmethodscoverproceduresfortestingcross-linkedinsulationsandjacketsforwireandcable.Todeterminethetesttobemadeontheparticularinsulationorjacket,refertotheproductspecificationforthattype.Thesetestmethodsdonotapplytotheclassofproductsknownasflexiblecords.1.2Inmanyinstancestheinsulationorjacketcannotbetestedunlessithasbeenformedaroundaconductororcable.Therefore,testsaredoneoninsulatedorjacketedwireorcableinthesetestmethodssolelytodeterminetherelevantpropertyoftheinsulationorjacketandnottotesttheconductororcompletedcable.1.3Thesetestmethodsappearinthefollowingsections:TestMethodSection(s)ACandDCVoltageWithstandTests22to29CapacitanceandDissipationFactorTests38to44ColdBend124ColdBend,Long-timeVoltageTestonShortSpecimens51to57DoubleACVoltageTestonShortSpecimens45to50ElectricalTestsofInsulation17to64HeatDistortionTest123HorizontalFlameTest100(TestMethodD7936)InsulationResistanceTestsonCompletedCable30to37MineralFillerContent,Determinationof107to111OzoneResistanceTest87to99Partial-DischargeTest58to64PhysicalTestsofInsulationandJacketCompounds5to16SurfaceResistivityTest112to116TrackResistanceTest125to128U-BendDischargeTest117to121WaterAbsorptionTest65to71WaterAbsorptionTest,Accelerated72to86WaterAbsorptionTestonFibrousCoverings101to1061.4Whenevertwosetsofvaluesarepresented,indifferentunits,thevaluesinthefirstsetarethestandard,whilethoseintheparenthesesareforinformationonly.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisst...
