Designation:D876−21StandardTestMethodsforNonrigidVinylChloridePolymerTubingUsedforElectricalInsulation1ThisstandardisissuedunderthefixeddesignationD876;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thesetestmethodscoverthetestingofgeneral-purpose(GradeA),low-temperature(GradeB),andhigh-temperature(GradeC)2nonrigidvinylchloridepolymertubing,oritscopolymerswithothermaterials,foruseaselectricalinsula-tion.Forthepurposeofthesetestmethodsnonrigidtubingshallbetubinghavinganinitialelongationinexcessof100%atbreak.NOTE1—ThesetestmethodsaresimilarbutnotidenticaltothoseinIEC60684–2.1.2Thevaluesstatedininch-poundunitsaretoberegardedasstandard,exceptfortemperature,whichshallbeexpressedindegreesCelsius.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.3Theproceduresappearinthefollowingsections:ProcedureSectionASTMReferenceStandardBrittlenessTemperature37–39D746CorrosionTests68–79D1000DielectricBreakdownVoltageatHighHumidity59–67E104DielectricBreakdownVoltage52–58D149DimensionalTests8–14D374EffectofElevatedTemperatures19–30D412FlammabilityTestD8355,TestMethodAOilResistanceTest29–36D471PenetrationTest40–45Sampling6StrainReliefTest62–67TensionTest16–18D412TestConditions7VolumeResistivity46–51D2571.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeSection5.1.5Forfiretestcaveats,seeTestMethodsD8355.1.6Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecog...
