ASTM_B_416_-_98_2013.pdf

Designation:B41698(Reapproved 2013)Standard Specification forConcentric-Lay-Stranded Aluminum-Clad Steel Conductors1This standard is issued under the fixed designation B416;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 bare concentric-lay-strandedconductors made from bare,hard-drawn,round,aluminum-clad steel wires of 20.3%conductivity for general use ofelectrical purposes.This specification does not apply tostranded conductors for reinforcement in ACSR conductors.1.2 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.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:2B354 Terminology Relating to Uninsulated Metallic Electri-cal ConductorsB415 Specification for Hard-Drawn Aluminum-Clad SteelWire2.3 Other Documents:C8.1 Definitions and General Standards for Wires andCables3NBS Handbook 100Copper Wire Tables of the NationalInstitute of Standards and Technology43.Description of Conductor3.1 The designation of the finished conductor shall beexpressed as the number of wires and the diameter of theseindividual wires,usually expressed as the AWG size of thewires.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 expressed as number and AWG size ofindividual wires(Section 3 and Table 1),4.1.3 Direction of lay of outer layer,if other than left-hand(see 6.3),4.1.4 Package size(see 15.1),4.1.5 Special package markings if required(see 15.3),4.1.6 Special lagging if required(see 15.2),and4.1.7 Place of inspection if other than place of manufacture(Section 13).5.Joints5.1 Joints or splices may be made in the finished individualaluminum-clad steel wires composing concentric-lay strandedconductors using more than three wires,provided that suchjoints or splices have a protection and electrical conductanceequivalent to that of the wire itself and that they do notdecrease the strength of the finished stranded conductor belowthe minimum breaking strength shown in Table 1.Such jointsor splices shall be not closer than 50 ft(15 m)to any other jointin the same layer in the conductor.NOTE1Joints are made by electrical butt-welding.The ends must becut and the end of each wire must be straightened for a distance of 12 to15 in.(300 to 380 mm).The proper sleeve is slipped over the end of oneof the wires.The wires are then butt-welded and dressed off to a finisheddiameter equal to that of the wire.The weld area is then tempered,thesleeve centered over the weld area and compressed to provide a finishedjoint that is smooth and neat in appearance.This joint has a tensile strengthof approximately 90%of rated breaking strength of the wire,but anallowance is made for this in the rated strength of the conductor as awhole.The completed conductor when containing such joints is requiredto have the full rated strength.6.Lay6.1 For 3-wire conductors,the preferred lay is 1612timesthe outside diameter,but the lay shall not be less than 14 timesnor more than 20 times this diameter.6.2 For 7,19,and 37-wire conductors,the preferred lay is1312times the diameter of that layer,but the lay shall not beless than 10 nor more than 16 times this diameter.1This specification is under the jurisdiction of ASTM Committee B01 onElectrical Conductors and is the direct responsibility of Subcommittee B01.06 onComposite Conductors.Current edition approved April 1,2013.Published April 2013.Originallyapproved in 1964.Last previous edition approved in 2007 as B416 98(2007).DOI:10.1520/B0416-98R132For 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 6.3 The direction of lay of the outer layer shall be left-handunless the direction of lay is specified otherwise by thepurchaser.6.4The direction of lay shall be reversed in consecutivelayers.6.5 All wires in the conductor shall lie naturally in their truepositions in the completed conductor.They shall tend to remain