Designation:D4246−14(Reapproved2020)StandardSpecificationforOzone-ResistantThermoplasticElastomerInsulationforWireandCable,90°COperation1ThisstandardisissuedunderthefixeddesignationD4246;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoversanozone-resistantinsulatingcompoundforelectricalwireandcables14AWGandlarger.Thiscompoundconsistssubstantiallyofathermoplasticelas-tomer.1.2Thistypeofinsulationisconsideredsuitableforcon-tinuousoperationatconductortemperaturesnotexceeding90°Cindrylocations.Operatingvoltagesarenottoexceed2000V.Theminimuminstallationtemperatureis–40°C.1.3Inmanyinstancestheinsulationmaterialcannotbetestedunlessithasbeenformedaroundaconductororcable.Therefore,testsaredoneoninsulatedwireorcableinthisspecificationsolelytodeterminetherelevantpropertyoftheinsulationmaterialandnottotesttheconductororcompletedcable.1.4Whenevertwosetsofvaluesarepresented,indifferentunits,thevaluesinthefirstsetaretoberegardedasstandard.Thevaluesgiveninparenthesesaremathematicalconversionsthatareprovidedforinformationonlyandarenotconsideredstandard.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D470TestMethodsforCrosslinkedInsulationsandJacketsforWireandCableD1711TerminologyRelatingtoElectricalInsulationD2633TestMethodsforThermoplasticInsulationsandJacketsforWireandCable3.Terminology3.1Definitions:3.1.1FordefinitionsoftermsusedinthisspecificationrefertoTerminologyD1711.3.2DefinitionsofTermsSpecifictoThisStandard:3.2.1aging(actof),n—theexposureofmaterialstoairat121...
