【英文标准名称】:StandardSpecificationfor19WireCombinationUnilay-StrandedCopperConductorsforSubsequentInsulation
【原文标准名称】:连续绝缘用19股金属线组合单层绞线铜导线的标准规范
【标准号】:ASTMB787/B787M-2004(2009)
【标准状态】:现行
【国别】:美国
【发布日期】:2004
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:B01.04
【标准类型】:(Specification)
【标准水平】:()
【中文主题词】:
【英文主题词】:Electricalpowersystems--specifications;Insulatedwireandcable--specifications;Mechanicalanalysis/testing;Ratedstrength(electricalconductorwire);Strandedcopperelectricalconductors--specifications;Strength--insulationapplications;Unilay-s
【摘要】:1.1Thisspecificationcoversbarecombinationunilay-strandedconductorsmadefromroundcopperwires,eitheruncoatedorcoatedwithtinorleadalloyforinsulatedconductorsforelectricalpurposes.Theseconductorsshallbeconstructedwithacentralcorewiresurroundedbytwolayersofhelicallylaidwires,resultinginanouterdiameterequaltothecompressed-strandedequivalentconductor.(SeeExplanatoryNote1andNote2).Note18212;Forthepurposeofthisspecification,combinationunilayconductorisdefinedasfollows:acentralcorewiresurroundedbyalayerofsixhelicallylaidwiresofthesamediameterasthecorewirewithahelicallylaidouterlayercontainingsixsmallerwiresalternatedbetweensixwiresofthesamediameterasthewiresinthelayerunderneath.Bothlayershaveacommonlengthanddirectionoflay(seeFig.1).1.2Forthepurposeofthisspecification,normalconductorclassification(ClassAA,A,B,C)isnotapplicableastheseconductorsareintendedforsubsequentinsulation.Thedescriptivetermcombinationunilay-strandedshallbeusedinplaceofconductorclassification.1.3ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.3.1ForconductorsizesdesignatedbyAWGorkcmil,therequirementsinSIunitshavebeennumericallyconvertedfromcorrespondingvalues,statedorderived,ininch-poundunits.1.3.2ForconductorsizesdesignatedbySIunitsonly,therequirementsarestatedorderivedinSIunits.1.3.3Fordensity,resistivity,andtemperature,thevaluesstatedinSIunitsaretoberegardedasstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:K12
【国际标准分类号】:29_060_20
【页数】:5P.;A4
【正文语种】:英语