Designation:B978/B978M−14StandardSpecificationforConcentric-Lay-StrandedAluminumConductors,CompositeReinforced(ACCR)1ThisstandardisissuedunderthefixeddesignationB978/B978M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoversconcentric-lay-strandedcon-ductorsmadefromroundaluminum-zirconiumalloywiresandanaluminummatrixcomposite(AMC)corewire(s)foruseasoverheadelectricalconductors(ExplanatoryNote1andEx-planatoryNote2).1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.2.ReferencedDocuments2.1Thefollowingdocumentsformapartofthisspecifica-tiontotheextentreferencedherein:2.2ASTMStandards:2B263TestMethodforDeterminationofCross-SectionalAreaofStrandedConductorsB354TerminologyRelatingtoUninsulatedMetallicElectri-calConductorsB682SpecificationforMetricSizesofElectricalConductorsB941SpecificationforHeatResistantAluminum-ZirconiumAlloyWireforElectricalPurposesB976SpecificationforFiberReinforcedAluminumMatrixComposite(AMC)CoreWireforAluminumConductors,CompositeReinforced(ACCR)E29PracticeforUsingSignificantDigitsinTestDatatoDetermineConformancewithSpecifications2.3NISTDocument:3NBSHandbook100—CopperWireTables2.4AluminumAssociationDocuments:4Publication50CodeWordsforOverheadAluminumElec-tricalConductorsAluminumAssociationGuidelineAMethodofStress-StrainTestingofAluminumConductorsandACSRandaTestMethodforDeterminingtheLongTimeCreepofAlumi-numConductorsinOverheadLines3.Terminology3.1Acronyms:3.1.1ACCR—aluminumconductor,compositereinforced3.1.2AMC—aluminummatrixcomposite3.1.3Al-Zr—aluminumzirconium4.OrderingInformation4.1Ordersformat...
