Designation:B246−15StandardSpecificationforTinnedHard-DrawnandMedium-Hard-DrawnCopperWireforElectricalPurposes1ThisstandardisissuedunderthefixeddesignationB246;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thisspecificationcoverstinnedhard-drawnandmedium-hard-drawnroundcopperwireforelectricalpurposes.1.2Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.2.1Exception—Fordensity,resistivityandtemperature,thevaluesstatedinSIunitsaretoberegardedasstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forhazardstatement,seeSections10and13.2.ReferencedDocuments2.1Thefollowingdocumentsoftheissueineffectonthedateofmaterialpurchaseformapartofthisspecificationtotheextentreferencedherein:2.2ASTMStandards:2B5SpecificationforHighConductivityTough-PitchCopperRefineryShapesB49SpecificationforCopperRodDrawingStockforElec-tricalPurposesB170SpecificationforOxygen-FreeElectrolyticCopper—RefineryShapesB193TestMethodforResistivityofElectricalConductorMaterials2.3NationalBureauofStandards:3NBSHandbook100—CopperWireTables3.OrderingInformation3.1Ordersformaterialunderthisspecificationshallincludethefollowinginformation:3.1.1Quantityofeachsize,3.1.2Wiresize,diameterininches(see5.1andTable1),3.1.3Typeofcopper,ifspecial(see4.2),3.1.4Temper(see7.1andTable1),3.1.5Packagesize(see18.1),3.1.6Specialpackagemarking,ifrequired,and3.1.7Placeofinspection(Section16).4.Materials4.1Thetinn...
