Designation:D4247–99AnAmericanNationalStandardStandardSpecificationforGeneral-Purpose,BlackHeavy-Duty,andBlackExtra-Heavy-DutyCrosslinkedPolychloropreneJacketsforWireandCable1ThisstandardisissuedunderthefixeddesignationD4247;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoverscrosslinkedpolychloroprenecompoundssuitableforuseasoutercoveringsorjacketsonelectricalcablesforgeneral-purpose,blackheavy-dutyandblackextra-heavy-dutyservice.1.2Thesejacketsarenotrecommendedforinstallationatatemperaturelowerthan−25°C.1.3Whenevertwosetsofvaluesarepresented,indifferentunits,thevaluesinthefirstsetarethestandard,whilethoseinparenthesesareforinformationonly.2.ReferencedDocuments2.1ASTMStandards:D470TestMethodsforCrosslinkedInsulationsandJacketsforWireandCable2D1711TerminologyRelatingtoElectricalInsulation23.Terminology3.1Definitions—Fordefinitionsoftermsusedinthisspeci-ficationrefertoTerminologyD1711.3.2DefinitionsofTermsSpecifictoThisStandard:3.2.1aging(actof),n—exposureofmaterialstoairat100°Cfor168horoilat121°Cfor18h.4.PhysicalProperties4.1Thejacketshallconformtotherequirementsforphysi-calpropertiesprescribedinTable1.5.Sampling5.1SamplethejacketinaccordancewithTestMethodsD470.6.TestMethods6.1TestthejacketinaccordancewithTestMethodsD470.7.Keywords7.1crosslinkedjacket;extra-heavy-dutyjacket;general-purposejacket;heavy-dutyjacket;polychloroprenejacket;rubberjacket1ThisspecificationisunderthejurisdictionofASTMCommitteeD-9onElectricalandElectronicInsulatingMaterialsandisthedirectresponsibilityofSubcommitteeD09.18onSolidInsulations,NonmetallicShieldings,andCoveringsforElectricalandTelecommunicationsWiresandCables.CurrenteditionapprovedApril10,1999.PublishedJune1999.OriginallypublishedasD4247–83.LastpreviouseditionD4247–95.2AnnualBookofASTMSta...
