ASTM B258-2014 Standard Specification for Standard Nominal Diameters and Cross-Sectional Areas of AWG Sizes of Solid Round Wires Used as Electrical Conductors《用作电导体的实心圆导线的AWG尺寸的标准公.pdf
《ASTM B258-2014 Standard Specification for Standard Nominal Diameters and Cross-Sectional Areas of AWG Sizes of Solid Round Wires Used as Electrical Conductors《用作电导体的实心圆导线的AWG尺寸的标准公.pdf》由会员分享,可在线阅读,更多相关《ASTM B258-2014 Standard Specification for Standard Nominal Diameters and Cross-Sectional Areas of AWG Sizes of Solid Round Wires Used as Electrical Conductors《用作电导体的实心圆导线的AWG尺寸的标准公.pdf(5页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: B258 14Standard Specification forStandard Nominal Diameters and Cross-Sectional Areas ofAWG Sizes of Solid Round Wires Used as ElectricalConductors1This standard is issued under the fixed designation B258; the number immediately following the designation indicates the year oforiginal ad
2、option 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.This standard has been approved for use by agencies of the U.S. Department of Defe
3、nse.1. Scope1.1 This specification prescribes standard nominal diam-eters and cross-sectional areas of American Wire Gage (AWG)sizes of solid round wires, used as electrical conductors, andgives equations and rules for the calculation of standardnominal mass and lengths, resistances, and breaking st
4、rengthsof such wires (Explanatory Note 1).1.2 The values stated in inch-pound or SI units are to beregarded separately as standard. Each system shall be usedindependently of the other. Combining values of the twosystems may result in nonconformance with the specification.For conductor sizes designat
5、ed by AWG or kcmil sizes, therequirements in SI units have been numerically converted fromthe corresponding values stated or derived, in inch-pound units.For conductor sizes designated by SI units only, the require-ments are stated or derived in SI units.1.2.1 For density, resistivity and temperatur
6、e, the valuesstated in SI units are to be regarded as standard.2. Referenced Documents2.1 ASTM Standards:2A111 Specification for Zinc-Coated (Galvanized) “Iron”Telephone and Telegraph Line WireA326 Specification for Zinc-Coated (Galvanized) High Ten-sile Steel Telephone and Telegraph Line Wire (With
7、drawn1990)3B1 Specification for Hard-Drawn Copper WireB2 Specification for Medium-Hard-Drawn Copper WireB3 Specification for Soft or Annealed Copper WireB9 Specification for Bronze Trolley WireB33 Specification for Tin-Coated Soft or Annealed CopperWire for Electrical PurposesB47 Specification for C
8、opper Trolley WireB105 Specification for Hard-Drawn Copper Alloy Wires forElectric ConductorsB189 Specification for Lead-Coated and Lead-Alloy-CoatedSoft Copper Wire for Electrical PurposesB193 Test Method for Resistivity of Electrical ConductorMaterialsB227 Specification for Hard-Drawn Copper-Clad
9、Steel WireB230/B230M Specification for Aluminum 1350H19 Wirefor Electrical PurposesB314 Specification for Aluminum 1350 Wire for Communi-cation Cable (Withdrawn 1994)3B396 Specification for Aluminum-Alloy 5005-H19 Wire forElectrical Purposes (Withdrawn 2003)3B398/B398M Specification for Aluminum-All
10、oy 6201-T81Wire for Electrical PurposesB415 Specification for Hard-Drawn Aluminum-Clad SteelWireB609/B609M Specification for Aluminum 1350 RoundWire, Annealed and Intermediate Tempers, for ElectricalPurposesB800 Specification for 8000 Series Aluminum Alloy Wirefor Electrical PurposesAnnealed and Int
11、ermediate Tem-persE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsF205 Test Method for Measuring Diameter of Fine Wire byWeighing3. Standard Reference Temperature3.1 For the purpose of this specification, all wire dimensionsand properties shall be co
12、nsidered as occurring at the interna-tionally standardized reference temperature of 20C (68F).1This specification is under the jurisdiction of ASTM Committee B01 onElectrical Conductors and is the direct responsibility of Subcommittee B01.02 onMethods of Test and Sampling Procedure.Current edition a
13、pproved April 1, 2014. Published April 2014. Originallyapproved in 1951. Last previous edition approved in 2008 as B258 02 (2008).DOI: 10.1520/B0258-14.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMSta
14、ndards volume information, refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14. Standard
15、 Rules for Rounding4.1 All calculations for the standard nominal dimensionsand properties of solid round wires shall be rounded in the finalvalue only, in accordance with rounding method of PracticeE29.5. Standard Nominal Diameters5.1 Standard nominal diameters of AWG sizes of solidround wires shall
16、 be calculated in accordance with the conven-tional mathematical law of the American Wire Gage (seeExplanatory Note 1) and in accordance with Section 4.5.2 For wire sizes 4/0 to 44 AWG, inclusive, nominaldiameters shall be expressed in no more than four significantfigures but in no case closer than
17、the nearest 0.1 mil (0.0001in.).5.3 For wire sizes 45 to 56 AWG, inclusive, nominaldiameters shall be expressed to the nearest 0.01 mil (0.00001in.).5.4 The standard nominal diameters expressed in mils havebeen calculated in accordance with these rules and are given inTable 1 for convenient referenc
18、e (Explanatory Note 2).6. Standard Nominal Cross-Sectional Areas6.1 Standard nominal cross-sectional areas in circular milsand square millimetres shall be calculated in accordance withthe following equations and shall be rounded in accordancewith Section 4 to the same number of significant figures a
19、s usedin expressing the standard diameters, but in no case to less thanthree significant figures:Area, cmil 5 d2Area, mm25 d235.067 31024where:d = diameter of the wire in mils as given in Table 1.Standard nominal cross-sectional areas in circular mils andsquare millimetres have been calculated in ac
20、cordance with theforegoing rules and are given in Table 1 for convenientreference.7. Rules for Calculations Involving Mass and Length7.1 Standard nominal mass and lengths shall be calculatedfrom the standard wire diameters specified in Table 1,inaccordance with the following equations. They shall be
21、rounded in the final value only, in accordance with Section 4,to the same number of significant figures as used in expressingthe standard diameters, but in no case to less than threesignificant figures:W 5 d23 30.34049 31023L 5 1/d2! 3 1/! 32.9369 3106TABLE 1 Standard Nominal Diameters and Cross-Sec
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