ASTM_D_4325_-_20.pdf

Designation:D432520Standard Test Methods forNonmetallic Semi-Conducting and Electrically InsulatingRubber Tapes1This standard is issued under the fixed designation D4325;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 the methods and proceduresfor testing electrically insulating and semi-conducting rubbertapes designed for splicing,terminating,and sheath repair ofelectrical wire and cable.1.2 The test methods appear in the following sections:SectionReferenced Documents2Conditioning5 6Dielectric Strength35 40Dimensions11 16Dissipation Factor22 26Elongation17 21Heat Exposure46 49Fusion7 10Ozone Resistance41 45Permittivity22 26Sample Requirements4Tensile Strength17 21Volume Resistivity27 34Ultraviolet and Weather Resistance50 541.3 The values stated in SI units are to be regarded asstandard.The values given in parentheses are mathematicalconversions to inch-pound units that are provided for informa-tion only and are not considered standard.NOTE1There is no IEC equivalent to these methods.1.4 Unless otherwise stated,measurements are made ontapes from which the removable separator has been removed.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 warning statement see 43.1.1.6 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 MaterialsD374/D374M Test Methods for Thickness of Solid Electri-cal InsulationD412 Test Methods for Vulcanized Rubber and Thermoplas-tic ElastomersTensionD470 Test Methods for Crosslinked Insulations and Jacketsfor Wire and CableD750 Practice for Rubber Deterioration Using ArtificialWeathering ApparatusD4388 Specification for Nonmetallic Semi-Conducting andElectrically Insulating Rubber TapesD4496 Test Method for D-C Resistance or Conductance ofModerately Conductive MaterialsE591 Practice for Safety and Health Requirements Relatingto Occupational Exposure to Ozone(Withdrawn 1990)33.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 fusion,nthat property of rubber tape which causesadjacent layers of tape to become bonded(amalgamated)oradhered together when the tape is stretched and wound uponitself in layers.1These 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 Aug.1,2020.Published September 2020.Originallyapproved in 1997.Last previous edition approved in 2013 as D4325 13.DOI:10.1520/D4325-20.2For 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.3The last approved version of this historical standard is referenced onwww.astm.org.*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.1SAMPLING4.Sample and Specimen Requirements4.1 Unless otherwise required by the detailed productspecifications,take the rubber tapes at random from eachshipment as follows:Number of Rollsin ShipmentNumber of SampleRolls50 to 2002201 to 5003501 to 100041001 to 500054.2 For shipments in excess of 5000 rolls,take one addi-tional roll for each additional 1000 rolls or fraction thereof.4.3 A shipment consists of material shipped or intended forshipment to a customer and covered by one bill of