ASTM_B_856_-_13.pdf

Designation:B85613Standard Specification forConcentric-Lay-Stranded Aluminum Conductors,CoatedSteel Supported(ACSS)1This standard is issued under the fixed designation B856;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 round wire concentric-lay-stranded aluminum conductors,steel supported(ACSS)for useas overhead electrical conductors(see Explanatory Note 1).1.2 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 sizes,therequirements in SI units are numerically converted from thecorresponding requirements in inch-pound units.For conductorsizes designation by AWG or kcmil,the requirements in SIunits have been numerically converted from correspondingvalues stated or derived in inch-pound units.For conductorsizes designated by SI units only,the requirements are stated orderived in SI units.1.2.1 For density,resistivity and temperature,the valuesstated in SI units are to be regarded as standard.2.Referenced Documents2.1 The following documents of the issue in effect on dateof material purchase form part of this specification to the extentreferenced herein:2.2 ASTM Standards:2B263 Test Method for Determination of Cross-SectionalArea of Stranded ConductorsB354 Terminology Relating to Uninsulated Metallic Electri-cal ConductorsB498/B498M Specification for Zinc-Coated(Galvanized)Steel Core Wire for Use in Overhead Electrical Conduc-torsB500/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 ConductorsB549 Specification for Concentric-Lay-Stranded AluminumConductors,Aluminum-Clad Steel Reinforced for Use inOverhead Electrical ConductorsB606 Specification for High-Strength Zinc-Coated(Galva-nized)Steel Core Wire for Aluminum and Aluminum-Alloy Conductors,Steel ReinforcedB609/B609M Specification for Aluminum 1350 RoundWire,Annealed and Intermediate Tempers,for ElectricalPurposesB802/B802M Specification for Zinc5%Aluminum-Mischmetal Alloy-Coated Steel Core Wire for AluminumConductors,Steel Reinforced(ACSR)B803 Specification for High-Strength Zinc5%Aluminum-Mischmetal Alloy-Coated Steel Core Wire for Use inOverhead Electrical ConductorsB857 Specification for Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors,Coated-Steel Sup-ported(ACSS/TW)B957 Specification for Extra-High-Strength and Ultra-High-Strength Zinc-Coated(Galvanized)Steel Core Wire forOverhead Electrical ConductorsB958 Specification for Extra-High-Strength and Ultra-High-Strength Class A Zinc5%Aluminum-Mischmetal Alloy-Coated Steel Core Wire for Use in Overhead ElectricalConductorsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE527 Practice for Numbering Metals and Alloys in theUnified Numbering System(UNS)2.3 Other Standards:AluminumAssociation Publication 50 Code words for Over-head Aluminum Electrical Conductors3NBS Handbook 100Copper Wire Tables of the NationalBureau of Standards41This 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 April 1,2013.Published May 2013.Originallyapproved in 1995.Last previous edition approved in 2012 as B856 12.DOI:10.1520/B0856-13.2For 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 Aluminum Association,Inc.,1525 Wilson Blvd.,Suite 600,Arlington,VA 22209,http:/www.aluminum.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 States1 3.Terminology3.1 For definitions of terms relating to conductors refer todefinitions found in Specification B354.3.2 Definitions:3.2.1 aluminum-cladaluminum bonded.3.2.2 galvanizedzinc coated.3.2.3 Zn-5A1-MMZinc-5%Aluminum-Mischmetal Alloy(Zn-5A1-MM)coated.3.3 Abbreviations:3.3.1 ACSSaluminum conductor,steel supported.3.3.2 ACSS/AW2supportedwithregularstrengthaluminum-clad core wire in accordance with SpecificationB502.3.3.3 ACSS/AW3supported with high strength aluminum-clad core wire in accordance with Specification B502.3.3.4 ACSS/GA2supported with regular strength galva-nized