ASTM_B_172_-_17.pdf

Designation:B17217Standard Specification forRope-Lay-Stranded Copper Conductors Having Bunch-Stranded Members,for Electrical Conductors1This standard is issued under the fixed designation B172;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 rope-lay-stranded con-ductors having bunch-stranded members made from roundcopper wires,either uncoated or coated with tin,lead,orlead-alloy for use as electrical conductors(Explanatory Notes1 and 2).1.2 Coated wires shall include only those wires with fin-ished diameters and densities substantially equal to the respec-tive diameters and densities of uncoated wires.1.3 The values stated in inch-pound or SI units are to beregarded separately as standard.Each system shall be usedindependently of the other.Combining values from the twosystems may result in nonconformance with the specification.For conductor sizes designated by AWG or kcmil,the require-ments in SI units have been numerically converted fromcorresponding values,stated or derived,in inch-pound units.For conductor sizes designated by SI units only,the require-ments are stated or derived in SI units.1.3.1 For density,resistivity,and temperature,the valuesstated in SI units are to be regarded as standard.1.4 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 at thetime of reference form a part of this specification to the extentreferenced herein:2.2 ASTM Standards:2B3 Specification for Soft or Annealed Copper WireB33 Specification for Tin-Coated Soft or Annealed CopperWire for Electrical PurposesB173 Specification for Rope-Lay-Stranded Copper Conduc-tors Having Concentric-Stranded Members,for ElectricalConductorsB189 Specification for Lead-Coated and Lead-Alloy-CoatedSoft Copper Wire for Electrical PurposesB193 Test Method for Resistivity of Electrical ConductorMaterialsB263 Test Method for Determination of Cross-SectionalArea of Stranded ConductorsB354 Terminology Relating to Uninsulated Metallic Electri-cal Conductors2.3 American National Standard:ANSI C42.35 Definitions of Electrical Terms33.Classification3.1 For the purpose of this specification rope-lay-strandedconductors having bunch-stranded members are classified asfollows:3.1.1 Class IConductors consisting of wires 0.0201-in.(0.511-mm)diameter(No.24 AWG)to produce rope-lay-stranded conductors up to 2 000 000 cmil(1013 mm2)in totalcross-sectional area.(Typical use is for special apparatusconductor.)3.1.2 Class KConductors consisting of wires 0.0100-in.(0.254-mm)diameter(No.30 AWG)to produce rope-lay-stranded conductors up to 1 000 000 cmil(507 mm2)in totalcross-sectional area.(Typical use is for special portable cordand conductors.)1This 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 April 1,2017.Published April 2017.Originallyapproved in 1942 to replace portions of B158 41 T.Last previous edition approvedin 2015 as B172 10(2015).DOI:10.1520/B0172-17.2For 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.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 3.1.3 Class MConductors consisting of wires 0.0063-in.(0.160-mm)diameter(No.34 AWG)to produce rope-lay-stranded conductors up to 1 000 000 cmil(507 mm2)in totalcross-sectional area.(Typical use is for welding conductors.)4.Ordering Information4.1 Orders for material under this specification shall includethe following information:4.1.1 Quantity of each size and class,4.1.2 Conductor size:circular-mil area or AWG(see 7.1),4.1.3 Class(Section 4 and Tables 1-3),4.1.4 Whether coated or uncoated;if