ASTM_D_470_-_21.pdf

Designation:D47021Standard Test Methods forCrosslinked Insulations and Jackets for Wire and Cable1This standard is issued under the fixed designation D470;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 These test methods cover procedures for testing cross-linked insulations and jackets for wire and cable.To determinethe test to be made on the particular insulation or jacket,referto the product specification for that type.These test methods donot apply to the class of products known as flexible cords.1.2 In many instances the insulation or jacket cannot betested unless it has been formed around a conductor or cable.Therefore,tests are done on insulated or jacketed wire or cablein these test methods solely to determine the relevant propertyof the insulation or jacket and not to test the conductor orcompleted cable.1.3 These test methods appear in the following sections:Test MethodSection(s)AC and DC Voltage Withstand Tests22 to 29Capacitance and Dissipation Factor Tests38 to 44Cold Bend124Cold Bend,Long-time Voltage Test on Short Specimens51 to 57Double AC Voltage Test on Short Specimens45 to 50Electrical Tests of Insulation17 to 64Heat Distortion Test123Horizontal Flame Test100(Test MethodD7936)Insulation Resistance Tests on Completed Cable30 to 37Mineral Filler Content,Determination of107 to 111Ozone Resistance Test87 to 99Partial-Discharge Test58 to 64Physical Tests of Insulation and Jacket Compounds5 to 16Surface Resistivity Test112 to 116Track Resistance Test125 to 128U-Bend Discharge Test117 to 121Water Absorption Test65 to 71Water Absorption Test,Accelerated72 to 86Water Absorption Test on Fibrous Coverings101 to 1061.4 Whenever two sets of values are presented,in differentunits,the values in the first set are the standard,while those inthe parentheses are for information only.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.For specific hazards see Section 4.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D149 Test Method for Dielectric Breakdown Voltage andDielectric Strength of Solid Electrical Insulating Materialsat Commercial Power FrequenciesD150 Test Methods for AC Loss Characteristics and Permit-tivity(Dielectric Constant)of Solid Electrical InsulationD257 Test Methods for DC Resistance or Conductance ofInsulating MaterialsD412 Test Methods for Vulcanized Rubber and Thermoplas-tic ElastomersTensionD454 Test Method for Rubber Deterioration by Heat andAirPressureD572 Test Method for RubberDeterioration by Heat andOxygenD573 Test Method for RubberDeterioration in an AirOvenD1193 Specification for Reagent WaterD1711 Terminology Relating to Electrical InsulationD2132 Test Method for Dust-and-Fog Tracking and ErosionResistance of Electrical Insulating MaterialsD3755 Test Method for Dielectric Breakdown Voltage andDielectric Strength of Solid Electrical Insulating MaterialsUnder Direct-Voltage StressD5423 Specification for Forced-Convection Laboratory Ov-ens for Evaluation of Electrical Insulation1These test methods are under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Insulating Materials and are the direct responsibility ofSubcommittee D09.07 on Electrical Insulating Materials.Current edition approved Jan.15,2021.Published February 2021.Originallyapproved in 1937.Last previous edition approved in 2013 as D470 13.DOI:10.1520/D0470-21.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1D7936 Test Method for Flammability of Electrical I