ASTM_B_48_-_00_2016.pdf

Designation:B4800(Reapproved 2016)Standard Specification forSoft Rectangular and Square Bare Copper Wire forElectrical Conductors1This standard is issued under the fixed designation B48;the number immediately following the designation indicates the year of originaladoption or,in the case of revision,the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers soft or annealed bare copperwire,rectangular or square in shape with rounded corners(Explanatory Note 1).1.2 For the purpose of this specification,the wire is classi-fied as follows:1.2.1 Type AFor all applications except those involvingedgewise bending.1.2.2 Type BFor applications involving edgewise bending.Type B wire of thickness less than 0.020 in.(0.51 mm)or witha ratio of width to thickness greater than 30 to 1 is notcontemplated in this specification.1.3 Unless otherwise specified by the purchaser,Type Amaterial shall be furnished.1.4 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;except for Sections 12 and 13.2.Referenced Documents2.1 ASTM Standards:2B49 Specification for Copper Rod for Electrical PurposesB193 Test Method for Resistivity of Electrical ConductorMaterialsB279 Test Method for Stiffness of Bare Soft Square andRectangular Copper andAluminum Wire for Magnet WireFabricationE8/E8M Test Methods for Tension Testing of Metallic Ma-terialsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications2.2 Other Documents:NBS Handbook 100 Copper Wire Tables33.Ordering Information3.1 Orders for material to this specification shall include thefollowing information:3.1.1 Quantity of each size;3.1.2 Type of wire(see 1.1,1.2,and 1.3);3.1.3 Wire size:thickness and width,in inches or millime-tres(see 6.1);3.1.4 Type of copper,if special(see Section 4);3.1.5 Package size(see 16.1);3.1.6 Special package marking,if required;and3.1.7 Place of inspection.(see Section 15).4.Material4.1 The material shall be copper of such quality and puritythat the finished product shall have the properties and charac-teristics prescribed in this specification.4.2 Specification B49 defines the materials suitable for use.5.Manufacture5.1 The wire shall be annealed after the last drawing orrolling to size and shape,and shall be so processed as toproduce a uniformly soft product with a clean surface.5.2 The finished wire shall not contain joints except such ashave passed through drawing dies.Necessary joints in the wireand rods prior to final drawing shall be made in accordancewith good commercial practice.6.Dimensions and Permissible Variations6.1 The dimensions shall be expressed in decimal fractionsof an inch or in millimetres.Unless otherwise specified,it willbe assumed that the dimensions are in inches.(ExplanatoryNote 6,Explanatory Note 7,and Explanatory Note 8.)6.2 The thickness shall not vary from that specified by morethan the amounts prescribed in Table 1.1This specification is under the jurisdiction of ASTM Committee B01 onElectrical Conductorsand is the direct responsibility of Subcommittee B01.04 onConductors of Copper and Copper Alloys.Current edition approved Oct.1,2016.Published October 2016.Originallyapproved in 1968.Last previous edition approved in 2011 as B48 00(2011).DOI:10.1520/B0048-00R16.2For 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 6.3 The width shall not vary from that specified by morethan the amounts prescribed in Table 2.6.4 The wire shall have rounded corners or rounded edgesas specified in Table 3 and as shown in Fig.1.Where roundedcorners are required,the corners of the wire shall be roundedwithin the limits of radii,25%under and 25%over(asdetermined by a radius gage)those radii values specified inTable 3.6.5 From each shipping unit,approximately 12 ft(3.66 m)shall be unwound and the wire gaged at six places betweenpoints 12 in.(30.5 cm)and 12 ft(3.66 m)from the end.Theshipping unit shall be rejected if the average of the measure-ments obtained is not within the limits specified in 6.2 and 6.3.7.Physical Requirements7.1 Elongation:7.1.1 Type A wire shall conform to the requirements forelongation given in Table 4.7.1.2 For Type B wire elongation tests shall not be required.7.1.3 Elongation tests shall be made in accordance with TestMethods E8/E8M on representative samples