ASTM_B_228_-_11a_2016.pdf

Designation:B22811a(Reapproved 2016)Standard Specification forConcentric-Lay-Stranded Copper-Clad Steel Conductors1This standard is issued under the fixed designation B228;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 bare concentric-lay-strandedconductors made from bare round copper-clad steel wires forgeneral use for electrical purposes.1.2 For the purpose of this specification,conductors areclassified as follows:Grade 40 HS,Grade 30 HS,Grade 30EHS,Grade 40 DSA,and Grade 30 DSA.The grades covered by this specification correspond to thefollowing commercial designations:Grade 40 HS,High Strength,40%Conductivity,Hard DrawnGrade 30 HS,High Strength,30%Conductivity,Hard DrawnGrade 30 EHS,Extra High Strength,30%Conductivity,Hard DrawnGrade 40 DSA,40%Conductivity,Dead Soft AnnealedGrade 30 DSA,30%Conductivity,Dead Soft Annealed1.3 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 The following documents of the issue in effect on thedate of material purchase form a part of this specification to theextent referenced herein:2.2 ASTM Standards:2B227 Specification 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 SpecificationsB910/B910M Specification for Annealed Copper-Clad SteelWire2.3 ANSI Standards:C 42 Definitions of Electrical Terms32.4 National Institute of Standards and 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 grade;3.1.2 Conductor size:approximate diameter in fractions ofan inch,or number and AWG size of individual wires(Section7 and Table 1);3.1.3 Grade(see 1.2 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 8.2);3.1.6 Package size(see 13.1);3.1.7 Special package marking,if required(Section 12);3.1.8 Lagging,if required(see 13.2);and3.1.9 Place of inspection(Section 14).3.2 In addition,Supplementary Requirements shall applyonly when specified by the purchaser in the inquiry,contract,orpurchase order for direct procurement by agencies of the U.S.Government(S1,S2,and S3).4.Material for Wires4.1 The purchaser shall specify the grade of wire to be usedin the conductor.4.2 Before stranding,the copper-clad steel wire shall meetall the requirements of Specification B227 for Grade 40 HS,Grade 30 HS and Grade 30 EHS and the requirements ofSpecification B910/B910M for Grade 40 DSA and Grade 30DSA.1This specification is under the jurisdiction of ASTM Committee B01 onElectrical Conductors and is the direct responsibility of Subcommittee B01.06 onBi-Metallic Conductors.Current edition approved April 1,2016.Published April 2016.Originallyapproved in 1948.Last previous edition approved in 2011 as B228 11a.DOI:10.1520/B0228-11AR16.2For 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.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.,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 States1 4.3 All wires in the conductor shall be of the same grade andquality.5.Joints5.1 Joints or splices may be made in the finished individualcopper-clad steel wires composing concentric-lay-strandedconductors,using more than three wires provided that suchjoints or splices have a protection equivalent to that of the wireitself and 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(Note 1).NOTE1Joints or splices in individual copper-clad steel