Designation:D4246−14StandardSpecificationforOzone-ResistantThermoplasticElastomerInsulationForWireandCable,90°COperation1ThisstandardisissuedunderthefixeddesignationD4246;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisspecificationcoversanozone-resistantinsulatingcompoundforelectricalwireandcables14AWGandlarger.Thiscompoundconsistssubstantiallyofathermoplasticelas-tomer.1.2Thistypeofinsulationisconsideredsuitableforcon-tinuousoperationatconductortemperaturesnotexceeding90°Cindrylocations.Operatingvoltagesarenottoexceed2000V.Theminimuminstallationtemperatureis-40°C.1.3Whenevertwosetsofvaluesarepresented,indifferentunits,thevaluesinthefirstsetarethestandard,whilethoseinparenthesesareforinformationonly.1.4Inmanyinstancestheinsulationmaterialcannotbetestedunlessithasbeenformedaroundaconductororcable.Therefore,testsaredoneoninsulatedwireorcableinthisspecificationsolelytodeterminetherelevantpropertyoftheinsulationmaterialandnottotesttheconductororcompletedcable.2.ReferencedDocuments2.1ASTMStandards:2D470TestMethodsforCrosslinkedInsulationsandJacketsforWireandCableD1711TerminologyRelatingtoElectricalInsulationD2633TestMethodsforThermoplasticInsulationsandJacketsforWireandCable3.Terminology3.1Definitions—Fordefinitionsoftermsusedinthisspeci-ficationrefertoTerminologyD1711.3.2DefinitionsofTermsSpecifictoThisStandard:3.2.1aging(actof),n—theexposureofmaterialstoairat121°Cfor168h.4.PhysicalProperties4.1RequirementsforphysicalpropertiesarelistedinTable1.4.2ThicknessofInsulation—Table1(a),(ConductorSizes,InsulationThicknesses,andACTestVoltagesforRubberInsulations)ofTestMethodsD470liststheminimumaveragethicknessfortheinsulation.Therequiredminimumthicknessis90%ofthespecifiedaveragethickness.5.ElectricalRequirements5.1OrderofTesting—Performtheacvolta...
