ASTM_B_549_-_18.pdf

Designation:B54918Standard Specification forConcentric-Lay-Stranded Aluminum Conductors,Aluminum-Clad Steel Reinforced for Use in Overhead ElectricalConductors1This standard is issued under the fixed designation B549;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.1.Scope1.1 This specification covers concentric-lay-stranded con-ductors made from round aluminum 1350-H19(extra hard)aluminum wires and round aluminum-clad steel core wires foruse as overhead electrical conductors(Explanatory Note 1 andNote 2).1.2 The SI values of density and resistivity are to beregarded as standard.For all other properties the inch-poundunits are regarded as standard and the SI units may beapproximate.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:2B230/B230M Specification for Aluminum 1350H19 Wirefor Electrical PurposesB263 Test Method for Determination of Cross-SectionalArea of Stranded ConductorsB354 Terminology Relating to Uninsulated Metallic Electri-cal ConductorsB500/B500M Specification for Metallic Coated or Alumi-num Clad Stranded Steel Core for Use in OverheadElectrical ConductorsB502 Specification for Aluminum-Clad Steel Core Wire forUse in Overhead Electrical Aluminum ConductorsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications2.3 ANSI Standards:3ANSI C 42.100 Dictionary of Electrical and ElectronicsTermsANSI H 35.1 American National Standard Alloy and Tem-per Designation Systems for Aluminum2.4 Other Standard:NBS Handbook 100Copper Wire Tables of the NationalBureau of Standards43.Terminology3.1 Description of Terms Specific to This Standard3.1.1 ACSR covered by this specification has one type ofsteel core wire which is designated by the following abbrevia-tion(Explanatory Note 2):3.1.1.1 ACSR/AWACSR using aluminum-clad steel wire(Explanatory Note 2).4.Classification4.1 For the purpose of this specification,conductors areclassified as follows(Explanatory Note 1 and Note 2):4.1.1 Class AAFor bare conductors usually used in over-head lines.These conductors are used as follows:4.1.1.1 Conductors used for regular overhead line construc-tion and4.1.1.2 Conductors having a high ratio of mechanicalstrength to current-carrying capacity used for overhead groundwires and for extra-long span construction.4.1.2 Class AFor conductors to be covered with weather-resistant(weatherproof)materials.1This specification is under the jurisdiction of ASTM Committee B01 onElectrical Conductors and is the direct responsibility of Subcommittee B01.07 onConductors of Light Metals.Current edition approved March 1,2018.Published March 2018.Originallyapproved in 1971.Last previous edition approved in 2013 as B549 13.DOI:10.1520/B0549-18.2For 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 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 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 5.Ordering Information5.1 Orders for material under this specification shall includethe following information:5.1.1 Quantity of each size,stranding,and class,5.1.2 Conductor size:circular mil area or AWG of alumi-num wires(Section 9 and Table 1),5.1.3 Number of wires,aluminum,and aluminum-clad steel(Table 1),5.1.4 Direction of lay of outer layer of aluminum wires ifother than right-hand(see 8.2),5.1.5 Special tests,if required(see 15.3 and 15.5),5.1.6 Package size(see 17.1 and Explanatory Note 5),5.1.7 Special package marking,if required(Section 17),5.1.8 Lagging,if required(see 17.3),and5.1.9 Place of inspection(Section 16).6.Requirement for Wires6.1 Before stranding,the aluminum wires used shall m