Designation:D5288−14StandardTestMethodforDeterminingTrackingIndexofElectricalInsulatingMaterialsUsingVariousElectrodeMaterials(ExcludingPlatinum)1ThisstandardisissuedunderthefixeddesignationD5288;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodwasdevelopedusingcopperelectrodestoevaluatethelow-voltage(upto600V)trackingresistanceofmaterialsinthepresenceofaqueouscontaminants.2NOTE1—Atthistime,onlyindustriallaminateshavebeenexaminedusingthismethod,whichwasdevelopedattheNationalManufacturersElectricalAssociation(NEMA)laboratorylocatedattheUniversityofCincinnati.Itwasfoundthatacloserendpoint(lessscatter)wasobtainedthanwithplatinumelectrodes,andmaterialstestedtendedtoberankedbyresinsystem.1.1.1Itisacceptabletoconsiderotherelectrodematerialsforusewiththistestmethoddependingupontheapplicationoftheinsulatingmaterial.1.2ThistestmethodissimilartoTestMethodD3638,whichdeterminesthecomparativetrackingindexofmaterialsusingplatinumelectrodestoproducethetrackingonthespecimensurface.1.3Thevaluesstatedinmetric(SI)unitsarethestandard.Theinch-poundequivalentsofthemetricunitsareapproxi-mate.1.4Thisstandardisusedtomeasureanddescribetheresponseofmaterials,products,orassembliestoheatandflameundercontrolledconditions,butdoesnotbyitselfincorporateallfactorsrequiredforfirehazardorfireriskassessmentofthematerials,products,orassembliesunderactualfireconditions.1.5Firetestingisinherentlyhazardous.Adequatesafe-guardsforpersonnelandpropertyshallbeemployedinconductingthesetests.2.ReferencedDocuments2.1ASTMStandards:3D618PracticeforConditioningPlasticsforTestingD1711TerminologyRelatingtoElectricalInsulationD3636PracticeforSamplingandJudgingQualityofSolidElectricalInsulatingMaterialsD3638TestMethodforComparativeTrackingIndexofElectricalInsulatingMaterials2.2IECPublica...
