Designation:B972−10(Reapproved2014)StandardSpecificationforNickel-CoatedBraidandRibbonFlatCopperWireIntendedforuseinElectronicApplication1ThisstandardisissuedunderthefixeddesignationB972;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoversnickel-coatedcopperbraidandribbonflatwireintendedforelectronicapplication(Explana-toryNote1).1.2Twoclassesofnickel-coatedbraidandribbonflatcopperwirearecoveredasfollows:1.2.1ClassA—Annealedtemper.1.2.2ClassH—Hard-drawn.1.3Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.3.1Exceptions—TheSIvaluesfordensity,resistivity,andvolumearetoberegardedasstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2B1SpecificationforHard-DrawnCopperWireB3SpecificationforSoftorAnnealedCopperWireB49SpecificationforCopperRodDrawingStockforElec-tricalPurposesB193TestMethodforResistivityofElectricalConductorMaterialsB258SpecificationforNominalDiametersandCross-SectionalAreasofAWGSizesofSolidRoundWiresUsedasElectricalConductors2.2OtherStandards:3NBSHandbook100CopperWireTables3.OrderingInformation3.1Ordersformaterialunderthisspecificationshallincludethefollowinginformation:3.1.1Quantityofeachsize,3.1.2Wiresize-thicknessandwidthininches(see5.4),3.1.3Classofwire(see1.2),3.1.4Typeofcopper,ifspecial(see4.2),3.1.5Packagesize(see10.1),3.1.6Specialpackagingmarking,ifrequired,and3.1.7Placeofinspection(see7.1).4.Material4.1Thematerialshallbenickel-coatedflatwire(E...
