Designation:D2770–01AnAmericanNationalStandardStandardSpecificationforOzone-ResistingEthylene-PropyleneRubberIntegralInsulationandJacketforWireandCable1ThisstandardisissuedunderthefixeddesignationD2770;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoversaweather-andozoneresistingvulcanizedrubberintegralinsulationandjacketcompoundforelectricalwiresandcables.Therubberpolymershallconsistsubstantiallyofethylenepropylenecopolymer(EPM)orofethylenepropyleneterpolymer(EPDM).1.2Thistypeinsulationisconsideredsuitableforuseonwireorcablewhichwillbeusedforcontinuousoperationatconductortemperaturesupto90°Cindrylocationsand75°Cinwetlocations,andatoperatingvoltagesnotexceeding2000V.1.3Thevaluesstatedininch-poundunits,exceptfortem-perature,areregardedasthestandard.Thevaluesinparenthe-sesareforinformationonly.2.ReferencedDocuments2.1ASTMStandards:D470TestMethodsforCrosslinkedInsulationsandJacketsforWireandCable23.PhysicalProperties3.1ThecrosslinkedintegralcoveringshallconformtotherequirementsforphysicalpropertiesspecifiedinTable1.3.2ThicknessofInsulation—TheaveragethicknessoftheinsulationshallbenotlessthanthatgiveninTable2.Theminimumthicknessshallbenotlessthan90%ofthespecifiedthickness.4.ElectricalRequirements4.1OrderofTesting—Performtheacvoltagewithstand,insulationresistance,anddcvoltagewithstandtestsinthatorderwhenanyofthesetestsarerequired.Thesequenceforothertestingisnotspecified.4.2ACVoltageWithstandTest—Eachlengthofintegrallycoveredconductorshallwithstandfor5mintheacvoltagespecifiedinTable2,unlessthedctestin4.4isperformed.4.3InsulationResistance—Theintegrallycoveredconduc-torshallhaveaninsulationresistancenotlessthanthatcorrespondingtoaconstantof10000at60°F(15.6°C).Wherethetemperatureofthewaterinwhichtheinsulationistesteddiffersfrom60...
