1、Designation: B682 01 (Reapproved 2009)1Standard Specification forStandard Metric Sizes of Electrical Conductors1This standard is issued under the fixed designation B682; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of l
2、ast revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1NOTE Editorial changes were made in Tables 1 and 2 in November 2015.1. Scope1.1 This specification covers and prescribes the recom
3、-mended standard metric sizes of solid round electrical conduc-tors.1.2 This specification prescribes the recommended standardmetric size designations of stranded electrical conductors (seeExplanatory Note 1).NOTE 1Physical properties, construction requirements, and manufac-turing tolerances for spe
4、cific products should be included in individualproduct specifications developed in accordance with appropriate sizes inthis specification.1.3 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.3.1 Exceptions For conductor sizes d
5、esignated byAWG or kcmil, the requirements in SI units have beennumerically converted from corresponding values, stated orderived, in inch-pound units. For conductor sizes designated bySI units only, the requirements are stated or derived in SI units.Rounded values appear in Table 1.2. Referenced Do
6、cuments2.1 ASTM Standards:2E29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsF205 Test Method for Measuring Diameter of Fine Wire byWeighing2.2 IEC Standards:IEC 182 Basic Dimensions of Winding Wires3IEC 228 Nominal Cross-SectionalAreas and Composition
7、 ofConductors of Insulated Cables32.3 ISO Standards:ISO R388 Metric Series for Basic Thickness of Sheet andDiameters of Wire33. Standard Reference Temperature3.1 For the purpose of this specification, all wire dimensionsand properties shall be considered as occurring at the interna-tionally standard
8、ized reference temperature of 20C.4. Preferred Numbers4.1 The diameters in Table 1 and preferred cross-sectionalareas in Table 2 are rounded preferred numbers from R(Renard) series in accordance with ISO R388.NOTE 2The use of preferred numbers has many advantages and thevalues selected do not vary s
9、ignificantly from the calculated numbers ofthe series used. The preferred and second preference size designations,using a Renard series of numbers, provides a schedule of interrelated sizesfor aluminum and copper conductors.NOTE 3Should sizes be needed either larger or smaller than thoselisted in Ta
10、ble 1 or Table 2, the respective R series may be expandedupward or downward.5. Standard Rules for Rounding5.1 All calculations for dimensions and properties, otherthan as provided in Section 4, shall be rounded in the finalvalues only, in accordance with the rounding method ofPractice E29.6. Standar
11、d Round-Wire Diameters (Note 2)6.1 The standard diameters of metric sizes of wires arepreferred numbers calculated in accordance with the conven-tional mathematical principles of an R series of 20 numbersfrom 1 to 10 with multiples and submultiples of 10.6.2 The wire diameters shall be expressed to
12、no more thanthree significant figures plus zeros.6.3 For wire diameters 0.050 mm and over, diameters shallbe expressed to three decimal places.6.4 For wire diameters less than 0.050 mm, diameters shallbe expressed to four decimal places.1This specification is under the jurisdiction of ASTM Committee
13、 B01 onElectrical Conductorsand is the direct responsibility of Subcommittee B01.02 onMethods of Test and Sampling Procedure.Current edition approved April 1, 2009. Published May 2009. Originallyapproved in 1981. Last previous edition approved in 2001 as B682 01. DOI:10.1520/B0682-01R09E01.2For refe
14、renced 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.3International Electrotechnical Commission and International Organizat
15、ion forStandardization documents are available from the American National StandardsInstitute (ANSI), 11 West 42nd St., 13th Floor, New York, NY 10036.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1TABLE 1 Standard Metric Diameters an
16、d Cross-Sectional Areas of Solid Round Wires at 20CDiameter Cross-Sectional Areamm (R 20 Series) in.Amm2in.2, AkcmilAcmilA18.0 0.7087 254.5 0.3944 502.216.0 0.6299 201.1 0.3116 396.814.0 0.5518 153.9 0.2386 303.812.5 0.4921 122.7 0.1902 242.211.2 0.4409 98.52 0.1527 194.410.0 0.3937 78.54 0.1217 155
17、.09.00 0.3543 63.62 0.09861 125.68.00 0.3150 50.27 0.07791 99.27.10 0.2795 39.59 0.06137 78.146.30 0.2480 31.17 0.04832 61.525.60 0.2205 24.63 0.03818 48.615.00 0.1969 19.63 0.03043 38.754.50 0.1772 15.90 0.02465 31.394.00 0.1575 12.57 0.01948 24.803.55 0.1398 9.898 0.01534 19.533.15 0.1240 7.793 0.
18、01208 15.382.80 0.1102 6.158 0.00954 12.152.50 0.0984 4.909 0.00761 9.692.24 0.0882 3.941 0.00611 7.782.00 0.0787 3.142 0.00487 6.201.80 0.0709 2.545 0.00394 5.021.60 0.0630 2.011 0.00312 3.971.40 0.0551 1.539 0.00239 3.041.25 0.0492 1.227 0.00190 2.421.12 0.0441 0.985 0.00153 1.941.00 0.0394 0.785
19、0.00122 1.550.900 0.0354 0.636 0.000986 1.260.800 0.0315 0.503 0.000779 0.9920.710 0.0280 0.396 0.000614 0.7810.630 0.0248 0.312 0.000483 0.6150.560 0.0220 0.246 0.000382 0.4860.500 0.0197 0.196 0.000304 0.3880.450 0.0177 0.159 0.000247 0.3140.400 0.0157 0.126 0.000195 0.2480.355 0.0140 0.0990 0.000
20、153 0.1950.315 0.0124 0.0779 0.000121 1540.280 0.0010 0.0616 0.0000954 1220.250 0.0098 0.0491 0.0000761 96.90.224 0.0088 0.0394 0.0000611 77.80.200 0.0079 0.0314 0.0000487 62.00.180 0.0071 0.0254 0.0000394 50.20.160 0.0063 0.0201 0.0000312 39.70.140 0.0055 0.0154 0.0000239 30.40.125 0.0049 0.0123 0.
21、0000190 24.20.112 0.0044 0.00985 0.0000153 19.40.100 0.0039 0.00785 0.0000122 15.50.090 0.0035 0.00636 0.00000986 12.60.080 0.0031 0.00503 0.00000779 9.920.071 0.0028 0.00396 0.00000614 7.810.063 0.0025 0.00312 0.00000483 6.150.056 0.0022 0.00246 0.00000382 4.860.050 0.0020 0.00196 0.00000304 3.880.
22、045 0.00177 0.00159 0.00000247 3.140.040 0.00157 0.00126 0.00000195 2.480.036 0.00142 0.00102 0.00000158 2.010.032 0.00126 0.000804 0.00000125 1.590.028 0.00110 0.000616 0.000000954 1.220.025 0.00098 0.000491 0.000000761 0.9690.022 0.00088 0.000394 0.000000611 0.778B682 01 (2009)126.5 The standard d
23、iameters expressed in millimetres inaccordance with these rules and practices are given in Table 1for convenient reference.NOTE 4Solid wires of the listed diameters are used for film coating,as wires in some stranded conductors, and as solid conductors in someinsulated and covered conductors.7. Stan
24、dard Stranded-Conductor Size Designations7.1 The standard metric size designations of stranded con-ductors and equivalent cross-sectional area are shown in TableTABLE 1 ContinuedDiameter Cross-Sectional Areamm (R 20 Series) in.Amm2in.2, AkcmilAcmilA0.0200 0.00079 0.000314 0.000000487 0.6200.0180 0.0
25、0071 0.000254 0.000000394 0.5020.0160 0.00063 0.000201 0.000000312 0.3970.0140 0.00055 0.000154 0.000000239 0.3040.0125 0.00049 0.000123 0.000000190 0.2420.0112 0.00044 0.000099 0.000000153 0.1940.0100 0.00039 0.000079 0.000000122 0.155AThe inch diameters, square inch areas, and circular mil areas a
26、re rounded values calculated from the metric diameters.TABLE 2 Standard Metric Size Designations of Stranded Conductors at 20CArea, mm2Area, mm2APreferred Sizes(R 10 Series)BSecond PreferenceSizesBThird PreferenceSizesCEquivalent Area,kcmilPreferred Sizes(R 5 Series)DSecond PreferenceSizesDThird Pre
27、ferenceSizesCEquivalent Area,kcmil2500 4934 100 197.42240 4421 95 187.52000 3947 80.0 157.91800 3552 70 138.11600 3158 63.0 124.31400 2763 50.0 98.681250 2467 40.0 78.941200 2368 35 69.071120 2210 31.5 62.171000 1974 25.0 49.34900 1776 20.0 39.47800 1579 16.0 31.58710 1401 12.5 24.67630 1243 10.0 19
28、.74560 1105 8.00 15.79500 986.8 6.30 12.43450 888.1 6 11.84400 789.4 5.00 9.868355 700.6 4.00 7.894315 621.7 3.15 6.217300 592.1 2.50 4.934280 552.6 2.00 3.947250 493.4 1.60 3.158240 473.6 1.5 2.960224 442.1 1.25 2.467200 394.7 1.00 1.974185 365.1 0.80 1.579180 355.2 0.75 1.480160 315.8 0.63 1.24315
29、0 296.0 0.50 0.987140 276.3 0.40 0.789125 246.7 0.32 0.622120 236.8 0.25 0.493112 221.0 0.20 0.3950.16 0.3160.12 0.2370.10 0.1970.08 0.1580.06 0.1240.05 0.0990.04 0.0790.03 0.059ASizes 40 mm2and smaller may have uses as solid single strand wire as well as stranded conductors of various flexibilities
30、.BThe sizes in these two columns combine to form the R20 series.CThird preference sizes are those IEC 228 sizes that do not conform to the Renard series of preferred numbers (see 7.1).DThe sizes in these two columns combine to form the R10 series.B682 01 (2009)132. Preferred and second preference si
31、zes are preferred numbersin the R10 series up through 100 mm2and in the R20 seriesover 100 mm2through 2500 mm2. Third preference sizes arethose IEC 228 sizes that do not conform to the Renard series ofpreferred numbers (Note 2).7.2 The standard areas shall be expressed to three significantfigures, b
32、ut to no more decimal places than 0.01 mm2.7.3 The standard areas expressed in square millimetres inaccordance with these rules and practices are given in Table 2for convenient reference.NOTE 5Stranded conductors of the listed cross-sectional areas areused in insulated as well as bare conductors. Th
33、ey may be of any type ofconstruction.8. Equivalent Areas and Diameters8.1 The areas of the standard diameters in Table 1 and thediameters of solid wires of the area sizes in Table 2 shall becalculated and rounded in accordance with Section 5 andexpressed to the same number of significant figures as
34、used inexpressing the standard diameters, but in no case to less thanthree significant figures.9. Tolerances9.1 Standard dimensions are given in Table 1 and Table 2.This standard is not concerned with quantitative values oftolerances per se, but it is contemplated that the standard wireand stranded-
35、conductor sizes in Table 1 and Table 2, and theproperties derived therefrom, shall be subject to tolerances asindicated in the individual product specifications applicable tothe wires and stranded conductors of various materials andtempers.9.2 Actual cross-sectional areas of stranded conductors mayv
36、ary from the standard values depending upon theconstructions, diameters of wire specified, and tolerancesspecified in product specifications. The use of the preferrednumbers for the size designations is intended for easieridentification.10. Keywords10.1 electrical conductors round electrical conduct
37、ors roundwire; stranded conductor stranded electrical conductorsEXPLANATORY NOTESNOTE 1The purpose of this specification is to provide logicalgeometrically progressive series of sizes for guidance to individuals andorganizations preparing hard metric specifications for all types of roundwire and str
38、anded electrical conductors. The preferred sizes have beenestablished to avoid proliferation of non-preferred sizes. They provide aseries of sizes intended to be acceptable for most applications. The use ofmetric sizes will depend upon commercial factors, and their existencedoes not render obsolete
39、existing specifications with inch-pound units asstandard. This specification and hard metric conductor specificationsprepared in accordance with it are not intended to replace any of theexisting specifications having inch-pound units as the standard, with orwithout the inclusion of soft metric conve
40、rsion.Terminology:hard metric specificationa specification for bare, insulated, or cov-ered electrical conductors incorporating SI units as the standard, andincluding a series of standard sizes differing from those in inch-poundconductor specifications.soft metric conversionThe addition of SI units,
41、 converted from U.S.customary units, to a specification for bare, insulated, or covered electricalconductors which includes the inch-pound units as the standard and retainsthe customary series of standard sizes.NOTE 2Micrometer calipers graduated to measure 0.002 mm shouldbe considered satisfactory
42、for measuring the diameters of wires 0.050 mmand larger. For greater accuracy in obtaining the mean diameter ofultrafine wire smaller than 0.050 mm. Test Method F205 should beconsidered satisfactory.ASTM International takes no position respecting the validity of any patent rights asserted in connect
43、ion with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsibl
44、e technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful cons
45、ideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 B
46、arr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 01 (2009)14
