ASTM_B_189_-_05_2015.pdf

Designation:B18905(Reapproved 2015)Standard Specification forLead-Coated and Lead-Alloy-Coated Soft Copper Wire forElectrical Purposes1This standard is issued under the fixed designation B189;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 lead-coated and lead-alloy-coated,round,soft or annealed copper wire for electricalpurposes.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.The SI values for density andresistivity are to be regarded as the 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.The hazardstatement applies only to Section 6 of this specification.2.Referenced Documents2.1 The following documents of the issue in effect at thetime of reference form a part of these methods to the extentreferenced herein:2.2 ASTM Standards:2B49 Specification for Copper Rod Drawing Stock for Elec-trical PurposesB193 Test Method for Resistivity of Electrical ConductorMaterialsB258 Specification for Nominal Diameters and Cross-SectionalAreas ofAWG Sizes of Solid Round Wires Usedas Electrical Conductors2.3 NIST:NBS Handbook 100 Copper Wire Tables33.Ordering Information3.1 Orders for material under this specification shall includethe following information:3.1.1 Quantity of each size and type of coating;3.1.2 Wire size:diameter in inches(see 5.3 and Table 1);3.1.3 Type of coating(see Section 1);3.1.4 Type of copper,if special(see 4.2);3.1.5 Package size(see 8.1);3.1.6 Special package marking,if required;and3.1.7 Place of inspection(see 6.1).4.Material4.1 Coating MaterialThe coating material shall be com-mercially pure lead or a lead alloy.The lead alloy shallconform to the following requirements as to chemical compo-sition as determined by analysis of samples from the coatingbath:Lead,min,%25Tin,max,%75AAntimony,max,%6AIt is permissible to use alloying constituents other than those specified above toreplace a portion of the tin.4.2 Copper-Base MetalThe base metal shall be copper ofsuch quality and purity that the finished product shall haveproperties and characteristics prescribed in this specification.4.2.1 Copper of special qualities,forms,or types,as may beagreed upon between the manufacturer and the purchaser,andwhich will conform to the requirements prescribed in thisspecification may also be used.NOTE1Specification B49 defines copper suitable for use.5.General Requirements(See Section 9)5.1 Tensile Strength and Elongation(Explanatory Note1)The coated wire shall conform to the requirements forelongation prescribed in Table 1.No requirements for tensilestrength are specified.For wire whose nominal diameter ismore than 0.001 in.(1 mil)greater than a size listed in Table 1,but less than that of the next larger size,the requirements of thenext larger size shall apply.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 April 1,2015.Published April 2015.Originallyapproved in 1944.Last previous edition approved in 2010 as B189 05(2010).DOI:10.1520/B0189-05R15.2For 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 5.2 Resistivity(Explanatory Note 2)The electrical resis-tivity of the coated wire at a temperature of 20C shall notexceed the values prescribed in Table 2.5.3 Dimensions and Permissible Variations(ExplanatoryNote 1)The wire sizes shall be expressed as the diameter ofthe wire in decimal fractions of an inch to the nearest 0.0001 in.(0.1 mil).The coated wire shall not vary from the specifieddiameter by more than the amounts prescribed in Table 3.5.4 Continuity of CoatingThe lead or lead-alloy coatingshall be continuous.The continuity of coating on the wire shallbe determined on representative samples taken before strand-ing or insulating.The continuity of coating shall be determinedby the ammonium persulfate test in accordance with 6.4 or bythe sodium polysulfide