Designation:B231/B231M−16StandardSpecificationforConcentric-Lay-StrandedAluminum1350Conductors1ThisstandardisissuedunderthefixeddesignationB231/B231M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thisspecificationcoversaluminum1350-H19(extrahard),1350-H16or-H26(3⁄4hard),1350-H14or-H24(1⁄2hard),and1350-H142or-H242(1⁄2hard),bareconcentric-lay-strandedconductorsconstructedwithastraightroundcentralwiresurroundedbyoneormorelayersofhelicallylayedwires.Theconductorsareforgeneraluseforelectricalpurposes(ExplanatoryNote1andNote2).1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.2.1Fordensity,resistivityandtemperature,thevaluesstatedinSIunitsaretoberegardedasstandard.NOTE1—Priorto1975,aluminum1350wasdesignatedasECaluminum.NOTE2—ThealuminumandtemperdesignationsconformtoANSIStandardH35.1/H35.1M.Aluminum1350correspondstoUnifiedNum-beringSystemA91350inaccordancewithPracticeE527.NOTE3—Sealedconductorsthatareintendedtopreventlongitudinalwaterpropagationandarefurthercovered/insulatedarealsopermittedwithintheguidelinesofthisspecification.2.ReferencedDocuments2.1Thefollowingdocumentsoftheissueineffectondateofmaterialpurchaseformapartofthisspecificationtotheextentreferencedherein:2.2ASTMStandards:2B193TestMethodforResistivityofElectricalConductorMaterialsB230/B230MSpecificationforAluminum1350–H19WireforElectricalPurposesB263TestMethodforDeterminationofCross-SectionalAreaofStrandedConductorsB354TerminologyRelatingtoUninsulatedMetallicElectri-calConductorsB609/B609MSpecific...
