ASTM_B_902_-_B_902M_-_13e1.pdf

Designation:B902/B902M131Standard Specification forCompressed Round Stranded Copper Conductors,Hard,Medium-Hard,or Soft Using Single Input Wire Construction1This standard is issued under the fixed designation B902/B902M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1NOTEDesignation was corrected editorially in October 2013.1.Scope1.1 This specification covers stranded conductors madefrom round copper wires,either uncoated or coated with tin,lead,or lead alloy for general use in insulated conductorassemblies for electrical purposes.These conductors shall becomposed of one or more roller shaped or die closed layers ofhelically laid wires using the single input wire(SIW)method-ology.(see Note 1 and Explanatory Note 1)NOTE1Sealed conductors which are intended to prevent longitudinalwater propagation and are further covered/insulated,are also permittedwithin the guidelines of this specification.1.2 The values stated in inch-pound or SI units are to beregarded separately as standard.The values in each system arenot exact equivalents;therefore,each system shall be usedindependently of the other.Combining values from the twosystems may result in nonconformance with the specification.1.2.1 For density,resistivity,and temperature,the valuesstated in SI units are to be regarded as standard.2.Referenced Documents2.1 ASTM Standards:2B1 Specification for Hard-Drawn Copper WireB2 Specification for Medium-Hard-Drawn Copper WireB3 Specification for Soft or Annealed Copper WireB33 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 ConductorMaterialsB246 Specification for Tinned Hard-Drawn and Medium-Hard-Drawn Copper Wire for Electrical PurposesB263 Test Method for Determination of Cross-SectionalArea of Stranded ConductorsB354 Terminology Relating to Uninsulated Metallic Electri-cal Conductors2.2 Other Standard:3NBS Handbook 100:Copper Wire Tables3.Classification3.1 The conductors described in this specification are in-tended for subsequent insulation or covering.The classificationof these conductors is SIW compressed.4.Ordering Information4.1 Orders for material under this specification shall includethe following information:4.1.1 Quantity of each size,4.1.2 Conductor size:circular-mil area orAWG(see Section7),4.1.3 Class:SIW compressed(see 1.2 and Table 1),4.1.4 Temper(see 5.3),4.1.5 Whether coated or uncoated;if coated(see 5.1 and5.2).4.1.6 Details of special-purpose lays,if required(see 7.3).4.1.7 When physical tests shall be made(see Sections 9 and10).4.1.8 Package size(see 16.1).4.1.9 Lagging,if required(see 16.2).4.1.10 Special package marking,if required(see Section16.3),and4.1.11 Place of inspection(see Section 15).5.Requirements for Wires5.1 The purchaser shall designate the type of wire and thekind of coating,if any,to be used in the conductor.1This specification is under the jurisdiction of ASTM Committee B01 ofElectrical Conductors and is the direct responsibility of Subcommittee B01.04 onConductors of Copper and Copper Alloys.Current edition approved Feb.1,2013.Published February 2013.Originallyapproved in 2000.Last previous edition approved in 2010 as B902 04a(2010).DOI:10.1520/B0902_B0902M-13E01.2For 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 National Technical Information Service(NTIS),5301 ShawneeRd.,Alexandria,VA 22312,http:/www.ntis.gov.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.2 Before stranding,the copper wire used shall meet all ofthe requirements of the following specifications of ASTM thatare applicable to its type:5.2.1 Specification B3,5.2.2 Specification B33,5.2.3 Specification B2,5.2.4 Specification B1,5.2.5 Specification B189,and5.2.6 Specification B246.5.3 In SIW compressed conductors,the central core shall bemade of wire of the same type and temper as the concentriclayers,unless otherwise specified.6.Joints6.1 Welds and brazes may be made in rods or in wires priorto final drawing.Welds and brazes may be made in the finishedindividual wires composing the conductor,but shall not becloser together than prescribed in Table 2.TABLE 1 Construction Requirements of Compressed Round SIW Standard Copper ConductorsCompressed Strand DimensionsConductor SizeMinimumNumber ofNominalDiameterof SIWCompressedConductor,NominalDiameterof SIWCompressedConductor,MassDC Resistance at 20CcmilsAWGmm2Wiresin.mm.lb/1000ftkg/km/1000ft/km5 00