Designation:D4566−20StandardTestMethodsforElectricalPerformancePropertiesofInsulationsandJacketsforTelecommunicationsWireandCable1ThisstandardisissuedunderthefixeddesignationD4566;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thesetestmethodscoverproceduresforelectricaltestingofthermoplasticinsulationsandjacketsusedontele-communicationswireandcableandforthetestingofelectricalcharacteristicsofcompletedproducts.Todeterminetheproce-duretobeusedontheparticularinsulationorjacketcompound,orontheendproduct,referenceshouldbemadetothespecificationfortheproduct.1.2Thesetestmethodsappearinthefollowingsectionsofthisstandard:TestMethodSectionsElectricalTestsofInsulation—In-process5–9DCprooftest9InsulationDefectorFaultRate8SparkTest7ElectricalTestsofCompletedWireandCable10–52Attenuation25Attenuation,EffectsDuetoAging32Attenuation,EffectsDuetoElevatedTemperature30Attenuation,EffectsDuetoHumidity31AttenuationtoCrosstalkRatio—FarEnd(ACR-F)29AttenuationtoCrosstalkRatio—NearEnd(ACR-N)27CapacitanceDeviation20CapacitanceDifference21CapacitanceUnbalance,Pair-to-ground(CUPG)23CapacitanceUnbalance,Pair-to-pair(CUPP)22CapacitanceUnbalance,Pair-to-supportWire24CharacteristicImpedance—TestMethod1:PropagationCon-stantandCapacitance48CharacteristicImpedance—TestMethod2:Single-endedMea-surements49CharacteristicImpedance—TestMethod3:LeastSquaresFunctionFit50CoaxialCapacitance(CapacitancetoWater)18ConductorContinuity12ConductorResistance(CR)14ConductorResistanceUnbalance(CRUofPairs)16ContinuityofOtherMetallicElements13CrossesTest(ContinuityBetweenWiresofDifferentPairs)36CrosstalkLoss,Far-end28CrosstalkLoss,Near-end26DCProofTest,Core-to-internalShield(Screen)41DCProofTest,Core-to-shield39DCProofTest,Core-to-supportWire40DCProofTest,InternalShield(Screen)-to-shield42DCP...
