1、Designation:B22912(Reapproved 2017)Standard Specification forConcentric-Lay-Stranded Copper and Copper-Clad SteelComposite Conductors1This standard is issued under the fixed designation B229;the number immediately following the designation indicates the year oforiginal adoption or,in the case of rev
2、ision,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.1.Scope1.1 This specification covers concentric-lay-stranded con-ductors made from uncoated hard-drawn round copper
3、wires incombination with hard-drawn round copper-clad steel wires forgeneral use as overhead electrical conductors.1.2 For the purpose of this specification,conductors areclassified under the following type designations(see Fig.1):Type AType GType CType JType DType KType EType NType EKType PType FTy
4、pe V1.3 The SI values for density are regarded as the standard.For all other properties the inch-pound values are to beregarded as standard and the SI units may be approximate.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization
5、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 ASTM Standards:2B1 Specification for Hard-Drawn Copper WireB227 Specification
6、for Hard-Drawn Copper-Clad Steel WireB354 Terminology Relating to Uninsulated Metallic Electri-cal ConductorsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications2.2 ANSI Standard:C 42 Definitions of Electrical Terms32.3 National Institute of Standards an
7、d Technology:NBS Handbook 100Copper Wire Tables43.Ordering Information3.1 Orders for material under this specification shall includethe following information:3.1.1 Quantity of each size and type;3.1.2 Conductor size:hard-drawn copper equivalent incircular-mil area or AWG(Section 7 and Table 1);3.1.3
8、 Type(see 1.2,Fig.1,and Table 1);3.1.4 Direction of lay of outer layer,if other than left-hand(see 6.3);3.1.5 When physical tests shall be made(see section 8.2);3.1.6 Package size(see 14.1);3.1.7 Special package marking,if required(Section 15);3.1.8 Lagging,if required(see 14.2);and3.1.9 Place of in
9、spection(Section 13).4.Material for Wires4.1 The purchaser shall designate the size and type ofconductor to be furnished.The position of the hard-drawncopper wires and the copper-clad steel wires in the conductorcross section shall be as shown in Fig.1.4.2 Before stranding,the wire used shall meet t
10、he require-ments of Specifications B1 and B227 that are applicable to itstype.5.Joints5.1 CopperWelds and brazes may be made in copper rodsor in copper wires prior to final drawing.Joints may not bemade in the finished copper wires composing concentric-lay-stranded composite conductors containing a
11、total of sevenwires or less.In other conductors,welds and brazes may bemade in the finished individual copper wires composing the1This specification is under the jurisdiction of ASTM Committee B01 onElectrical Conductors and is the direct responsibility of Subcommittee B01.06 onBi-Metallic Conductor
12、s.Current edition approved April 1,2017.Published April 2017.Originallyapproved in 1948.Last previous edition approved in 2012 as B229 12.DOI:10.1520/B0229-12R17.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of A
13、STMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.4Available from National Institute of Standards and Technology(NIST),100Bureau Dr.,
14、Stop 1070,Gaithersburg,MD 20899-1070,http:/www.nist.gov.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
15、 Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 conductor,but shall be not closer than 50 ft(15 m)to any otherjoint in the same layer in the conductor.5.2 Copper-Clad S
16、teelJoints or splices may be made inthe finished individual copper-clad steel wires composingconcentric-lay-stranded conductors,provided that such jointsor splices have a protection equivalent to that of the wire itselfand that they do not decrease the strength of the finishedstranded conductor below the minimum breaking strengthshown in Table 1.Such joints or splices shall be not closer than50 ft(15 m)to any other joint in the same layer in theconductor(Explanatory Note 1).6.Lay6.1 For Types A,
