Designation:D4872−14StandardTestMethodforDielectricTestingofWireandCableFillingCompounds1ThisstandardisissuedunderthefixeddesignationD4872;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthedeterminationofdissipationfactor,permittivity(dielectricconstant),andacvolumeresis-tivityofwireandcablefillingcompoundsandrelatedmaterialsthataresolidatroomtemperature,butcapableofbeingmeltedatelevatedtemperature.1.2Whenevertwosetsofvaluesarepresented,indifferentunits,thevaluesinthefirstsetarethestandard,whilethoseinparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.SpecifichazardstatementsaregiveninSection7.2.ReferencedDocuments2.1ASTMStandards:2D150TestMethodsforACLossCharacteristicsandPermit-tivity(DielectricConstant)ofSolidElectricalInsulationD257TestMethodsforDCResistanceorConductanceofInsulatingMaterialsD1321TestMethodforNeedlePenetrationofPetroleumWaxesD1711TerminologyRelatingtoElectricalInsulationD6054PracticeforConditioningElectricalInsulatingMate-rialsforTesting(Withdrawn2012)33.Terminology3.1Definitions—Fordefinitionsoftermsusedinthistestmethod,refertoTerminologyD1711.4.SummaryofTestMethod4.1Placeameasuredvolumeofmeltedsample,freeofentrappedair,intoalevelpreheatedspecimendish.Allowthespecimentocoolandplaceprimaryandsecondaryelectrodesinuniformcontactwiththespecimensurface.Connecttestleadstothespecimendishandthecoverplateelectrode;makemeasurementstoobtainvaluesfromwhichdissipationfactor,permittivity,anddcvolumeresistivityarecalculated.5.SignificanceandUse5.1Dissipationfactor,permittivity,anddcvolumeresistiv-it...
