Designation:D4245−21StandardSpecificationforOzone-ResistantThermoplasticElastomerInsulationForWireandCable,90°CDry/75°CWetOperation1ThisstandardisissuedunderthefixeddesignationD4245;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisspecificationcoversanozone-resistantinsulatingcompoundforelectricalwireandcables14AWGandlarger.Thiscompoundconsistssubstantiallyofathermoplasticelas-tomer.1.2Thistypeofinsulationissuitableforcontinuousopera-tionatconductortemperaturesnotexceeding90°Cindrylocationsand75°Cinwetlocations.Operatingvoltagesarenottoexceed2000V.Theminimuminstallationtemperatureis−40°C.1.3Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.4Inmanyinstancestheinsulationmaterialcannotbetestedunlessithasbeenformedaroundaconductororcable.Therefore,testsaredoneoninsulatedwireorcableinthisdocumentsolelytodeterminetherelevantpropertyoftheinsulationmaterialandnottotesttheconductororcompletedcable.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D470TestMethodsforCrosslinkedInsulationsandJacketsforWireandCableD1711TerminologyRelatingtoElectricalInsulationD2633TestMethodsforThermoplasticInsulationsandJacketsforWireandCable3.Terminology3.1Definitions:3.1.1FordefinitionsoftermsusedinthisspecificationrefertoTerminologyD1711.3.2DefinitionsofTermsSpecifictoThisStandard:3.2.1aging,n—exposureofmaterialstoairat121°Cfor168h.4.PhysicalProperties4.1Require...
