ASTM_B_286_-_07_2017.pdf

Designation:B28607(Reapproved 2017)Standard Specification forCopper Conductors for Use in Hookup Wire for ElectronicEquipment1This standard is issued under the fixed designation B286;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This specification covers uninsulated metallic-coatedcopper conductors for use in hookup wire for electronicequipment.1.2 The SI values for density are to be regarded as standard.For all other properties,the inch-pound values are to beregarded as the standard.1.3 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 The following documents of the issue in effect on dateof material purchase form a part of this specification to theextent referenced herein:2.2 ASTM Standards:2B33 Specification for Tin-Coated Soft or Annealed CopperWire for Electrical PurposesB189 Specification for Lead-Coated and Lead-Alloy-CoatedSoft Copper Wire for Electrical PurposesB193 Test Method for Resistivity of Electrical ConductorMaterialsB258 Specification for Nominal Diameters and Cross-SectionalAreas ofAWG Sizes of Solid Round Wires Usedas Electrical ConductorsB298 Specification for Silver-Coated Soft or Annealed Cop-per WireB355 Specification for Nickel-Coated Soft orAnnealed Cop-per Wire3.Ordering Information3.1 Orders for material under this specification shall includethe following information:3.1.1 Quantity of each size,designation(Table 1)and type,3.1.2 Conductor size,designation,construction,and type(Table 1).3.1.3 Whether tin,lead alloy,silver-coated,or nickel-coated(see 4.1).3.1.4 For silver-coated conductors and nickel-coatedconductors,class of coating(see 4.1),and when required,unannealed(see 4.2),3.1.5 Desired constructions where alternates are given(Table 1,Type II and,5.1,6.1,and 6.2),3.1.6 Package size(Section 12).3.1.7 Special package marking if required(Section 11),and3.1.8 Place of inspection(Section 10).4.General Requirements4.1 Coating of WiresThe coating of the solid conductorsand the wires composing stranded conductors(before strand-ing)shall conform to the coating requirements of ASTMSpecifications B33,B189,B298,and B355,as indicated on thepurchase order.4.2 TemperUnless otherwise specified,all coated conduc-tors shall be furnished in the annealed temper.When sospecified,silver-coated conductors or nickel-coated conductorsshall be furnished unannealed(Explanatory Note 1).NOTE1The term unannealed as used in this specification meanscold-worked conductor as produced on commercial wire-drawing ma-chines.4.3 ElongationThe elongation of annealed Type I conduc-tors shall be as specified in Specifications B33,B189,B298,and B355 as applicable.The elongation of stranded conductorsshall be permitted to vary from the requirements of theapplicable Specifications:B33,B189,B298,and B355 by thefollowing amounts:4.3.1 For stranded conductors 22 AWG and smaller,the testshall be performed on the whole conductor and the elongation1This specification is under the jurisdiction of ASTM Committee B01 onElectrical Conductors and is the direct responsibility of Subcommittee B01.04 onConductors of Copper and Copper Alloys.Current edition approved May 15,2017.Published May 2017.Originallyapproved in 1954.Last previous edition approved in 2012 as B286 07(2012).DOI:10.1520/B0286-07R17.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 TABLE 1 Details of Conductor ConstructionType I(Solid Conductors)SizeDesignation,AWGNominalArea,cmilsNominalDiameter,in.D-C Resistance at 20C,/1000 ft,max(Explanatory Note 2)Annealed Tin orLead-Alloy CoatedAnnealedSilverCoatedClass 2NickelAClass 10NickelClass 27Nickel10103800.10191.061.021.051.171.441265300.08081.691.621.681.842.281441100.06412.682.582.672.933.631625800.05084.264.104.274.655.771816200.04036.786.526.797.399.172010200.032010.710.310.811.814.6226400.02531