ASTM_B_835_-_14.pdf

Designation:B83514Standard Specification forCompact Round Stranded Copper Conductors Using SingleInput Wire Construction1This standard is issued under the fixed designation B835;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 compact round strandedconductors made from uncoated copper wires of a single inputwire(SIW)diameter for general use in covered or insulatedelectrical wires or cables.These conductors shall be con-structed with one or more layers of helically laid compactedwires(Explanatory Note 1,Note 2,and Note 3).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.1.2.1 For density,resistivity and temperature,the valuesstated in SI units are to be regarded as standard.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.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:2B3 Specification for Soft or Annealed Copper WireB263 Test Method for Determination of Cross-SectionalArea of Stranded ConductorsB354 Terminology Relating to Uninsulated Metallic Electri-cal Conductors2.3 NIST Document: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 compact.4.Ordering Information4.1 Orders for material in accordance with this specificationshall include the following information:4.1.1 Quantity of each size(Table 1);4.1.2 Conductor size,circular-mil area,orAWG(Section 8);4.1.3 Packaging(Section 16),if required;4.1.4 Special package marking;and4.1.5 Place of inspection(Section 15).5.Requirements for Wires5.1 Before stranding and compacting,the copper wire shallmeet all of the requirements of Specification B3.6.Joints6.1 Welds and brazes may be made in rods or in wires priorto final drawing.6.2 Welds and brazes may be made in the individual wiresfor compact conductors,but they shall not be closer togetherthan 1 ft(0.3 m)for conductor of 19 wires or less or closer than1 ft(0.3 m)in a layer for conductor of more than 19 wires.6.3 No joint or splice shall be made in a compact-strandedconductor as a whole.7.Lay7.1 The length of lay shall not be less than 8 or more than16 times the outside diameter of the completed conductor.7.2 The direction of lay of the outer layer shall be left-hand,and it may be reversed or unidirectional in successive layers.7.3 Other lay requirements may be furnished upon specialagreement between the manufacturer and the purchaser.8.Construction8.1 The construction of the compact round SIW strandedconductors shall be as given in Table 1.1This 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 Sept.1,2014.Published September 2014.Originallyapproved in 1993.Last previous edition approved in 2009 as B835 04(2009).DOI:10.1520/B0835-14.2For 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 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 8.2 Wires used in the fabrication of the compact roundconductor shall be of such dimensions as to produce a finishedconductor as prescribed in Table 1.9.Density9.1 For the purpose of calculating mass per unit length,cross sections,and so forth,the density of the copper shall betaken as 8.89 g/cm3(0.32117 lb/in.3)at 20C.10.Mass and Electrical Resistance10.1 The mass and electrical resistance of a unit length ofstranded unsealed conductor are a function of the length of lay.The approximate mass and electrical resistance may be deter-mined using an increment of 2%.When greater accuracy isdesired,the increment based on the specific lay of the conduc-tor may be calculated(Explanatory Note 4).10.2 The maximum electrical resistance of a unit length ofstranded conductor shall not exceed 102%of the nominal dcres