1、Designation:B17417Standard Specification forBunch-Stranded Copper Conductors for ElectricalConductors1This standard is issued under the fixed designation B174;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.
2、A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This specification covers bare bunch-stranded conduc
3、-tors made from round copper wires,either uncoated or coatedwith tin,lead,or lead-alloy for use as electrical conductors(Explanatory Note 1 and Explanatory Note 2).1.2 Coated wires shall include only those wires with fin-ished diameters and densities substantially equal to the respec-tive diameters
4、and densities of uncoated wires.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may re
5、sult in non-conformancewith the standard.1.3.1 For conductor sizes designated by AWG or kcmil,therequirements in SI units have been numerically converted fromcorresponding values,stated or derived,in inch-pound units.For conductor sizes designated by SI units only,the require-ments are stated or der
6、ived in SI units.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization Tech
7、nicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 The following documents of the issue in effect at thetime of reference form a part of this specification to the extentreferenced herein:2.2 ASTM Standards:2B3 Specification for Soft or Annealed Copper WireB33 Specification for Tin-Coated
8、 Soft or Annealed CopperWire for Electrical PurposesB172 Specification for Rope-Lay-Stranded Copper Conduc-tors Having Bunch-Stranded Members,for Electrical Con-ductorsB189 Specification for Lead-Coated and Lead-Alloy-CoatedSoft Copper Wire for Electrical PurposesB193 Test Method for Resistivity of
9、Electrical ConductorMaterialsB263 Test Method for Determination of Cross-SectionalArea of Stranded ConductorsB354 Terminology Relating to Uninsulated Metallic Electri-cal Conductors2.3 American National Standard:ANSI C42.35 Definitions of Electrical Terms33.Classification3.1 For the purpose of this
10、specification bunch-strandedconductors are classified as shown in Tables 1 and 2.4.Ordering Information4.1 Orders for material under this specification shall includethe following information:4.1.1 Quantity of each size and class,4.1.2 Conductor size:circular-mil area or AWG(see 7.1),4.1.3 Class(Sect
11、ion 3 and Table 3),4.1.4 Whether coated or uncoated;if coated,designate typeof coating(see 11.1),4.1.5 Maximum length of lay(see 6.3),4.1.6 Whether separator is required(see 7.2),1This specification is under the jurisdiction of ASTM Committee B01 onElectrical Conductors and is the direct responsibil
12、ity of Subcommittee B01.04 onConductors of Copper and Copper Alloys.Current edition approved April 1,2017.Published April 2017.Originallyapproved in 1941.Last previous edition approved in 2015 as B174 10(2015).DOI:10.1520/B0174-17.2For referenced ASTM standards,visit the ASTM website,www.astm.org,or
13、contact 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.Copyright ASTM
14、 International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,
15、Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 4.1.7 Package size(see section 14.1),4.1.8 Special package marking,if required(Section 14),and4.1.9 Place of inspection(Section 13).TABLE 1 A Classification and Construction Requirements of
16、Bunch-Stranded ConductorsAClass I Bunch Stranded ConductorsArea ofCross SectionClassification,Size,andMinimumNumberof WiresUncoated CopperCoated CopperSize,AWGClass INominalWireDiameter0.0201 In.(0.511 mm)Nominal dcresistance20CMaximum dcresistance20CNominal dcresistance20CMaximum dcresistance20CNominal dcresistance20CMaximum dcresistance20CNominal dcresistance20CMaximum dcresistance20Ccmilmm24 AWGohm/kftohm/kftohm/kmohm/kmohm/kftohm/kftohm/kmohm/km2082010.57520.5080.5181.671.700.5280.5391.731.7