1、Designation: B 682 01Standard Specification forStandard Metric Sizes of Electrical Conductors1This standard is issued under the fixed designation B 682; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A n
2、umber in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification prescribes the recommended standardmetric sizes of solid round electrical conductors.1.2 This specification prescrib
3、es the recommended standardmetric size designations of stranded electrical conductors (seeExplanatory Note 1).NOTE 1Physical properties, construction requirements, and manufac-turing tolerances for specific products should be included in individualproduct specifications developed in accordance with
4、appropriate sizes inthis specification.1.3 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 from the twosystems may result in nonconformance with the specification.For conductor sizes designate
5、d by AWG or kcmil, the require-ments 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 derived in SI units.2. Referenced Documents2.1 ASTM Standards:E 29 Practi
6、ce for Using Significant Digits in Test Data toDetermine Conformance with Specifications2F 205 Test Method for Measuring Diameter of Fine Wire byWeighing32.2 IEC Standards:IEC 182 Basic Dimensions of Winding Wires4IEC 228 Nominal Cross-Sectional Areas and Compositionof Conductors of Insulated Cables
7、42.3 ISO Standards:ISO R388 Metric Series for Basic Thickness of Sheet andDiameters of Wire43. Standard Reference Temperature3.1 For the purpose of this specification, all wire dimensionsand properties shall be considered as occurring at the interna-tionally standardized reference temperature of 20C
8、.TABLE 1 Standard Metric Diameters and Cross-Sectional Areas of Solid Round Wires at 20CDiameter Cross-Sectional Areamm (R 20 Series) in.Amm2in.2AkcmilA18.0 0.708 7 254.5 0.394 4 502.216.0 0.629 9 201.1 0.311 6 396.814.0 0.551 8 153.9 0.238 6 303.812.5 0.492 1 122.7 0.190 2 242.211.2 0.440 9 98.52 0
9、.152 7 194.410.0 0.393 7 78.54 0.121 7 155.09.00 0.354 3 63.62 0.098 61 125.68.00 0.315 0 50.27 0.077 91 99.27.10 0.279 5 39.59 0.061 37 78.146.30 0.248 0 31.17 0.048 32 61.525.60 0.220 5 24.63 0.038 18 48.615.00 0.196 9 19.63 0.030 43 38.754.50 0.177 2 15.90 0.024 65 31.394.00 0.157 5 12.57 0.019 4
10、8 24.803.55 0.139 8 9.898 0.015 34 19.531This specification is under the jurisdiction of ASTM Committee B01 on Wiresfor Electrical Conductorsand is the direct responsibility of Subcommittee B01.02onMethods of Test and Sampling Procedure.Current edition approved Mar. 10, 2001. Published May 2001. Ori
11、ginallypublished as B 682 81. Last previous edition B 682 81 (1996).2Annual Book of ASTM Standards, Vol 14.02.3Annual Book of ASTM Standards, Vol 10.04.4International Electrotechnical Commission and International Organization forStandardization documents are available from the American National Stan
12、dardsInstitute (ANSI), 11 West 42nd St., 13th Floor, New York, NY 10036.1Copyright ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.TABLE 1 ContinuedDiameter Cross-Sectional Areamm (R 20 Series) in.Amm2in.2AkcmilA3.15 0.124 0 7.793 0.012 08 15.382.80 0.110 2 6.158 0.009 5
13、4 12.152.50 0.098 4 4.909 0.007 61 9.692.24 0.088 2 3.941 0.006 11 7.782.00 0.078 7 3.142 0.004 87 6.201.80 0.070 9 2.545 0.003 94 5.021.60 0.063 0 2.011 0.003 12 3.971.40 0.055 1 1.539 0.002 39 3.041.25 0.049 2 1.227 0.001 90 2.421.12 0.044 1 0.985 0.001 53 1.941.00 0.039 4 0.785 0.001 22 1.550.900
14、 0.035 4 0.636 0.000 986 1.260.800 0.031 5 0.503 0.000 779 0.9920.710 0.028 0 0.396 0.000 614 0.7810.630 0.024 8 0.312 0.000 483 0.6150.560 0.022 0 0.246 0.000 382 0.4860.500 0.019 7 0.196 0.000 304 0.3880.450 0.017 7 0.159 0.000 247 0.3140.400 0.015 7 0.126 0.000 195 0.2480.355 0.014 0 0.099 0 0.00
15、0 153 0.195cmilA0.315 0.012 4 0.077 9 0.000 121 1540.280 0.001 0 0.061 6 0.000 095 4 1220.250 0.009 8 0.049 1 0.000 076 1 96.90.224 0.008 8 0.039 4 0.000 061 1 77.80.200 0.007 9 0.031 4 0.000 048 7 62.00.180 0.007 1 0.025 4 0.000 039 4 50.20.160 0.006 3 0.020 1 0.000 031 2 39.70.140 0.005 5 0.015 4
16、0.000 023 9 30.40.125 0.004 9 0.012 3 0.000 019 0 24.20.112 0.004 4 0.009 85 0.000 015 3 19.40.100 0.003 9 0.007 85 0.000 012 2 15.50.090 0.003 5 0.006 36 0.000 009 86 12.60.080 0.003 1 0.005 03 0.000 007 79 9.920.071 0.002 8 0.003 96 0.000 006 14 7.810.063 0.002 5 0.003 12 0.000 004 83 6.150.056 0.
17、002 2 0.002 46 0.000 003 82 4.860.050 0.002 0 0.001 96 0.000 003 04 3.880.045 0.001 77 0.001 59 0.000 002 47 3.140.040 0.001 57 0.001 26 0.000 001 95 2.480.036 0.001 42 0.001 02 0.000 001 58 2.010.032 0.001 26 0.000 804 0.000 001 25 1.590.028 0.001 10 0.000 616 0.000 000 954 1.220.025 0.000 98 0.000
18、 491 0.000 000 761 0.9690.022 0.000 88 0.000 394 0.000 000 611 0.7780.020 0 0.000 79 0.000 314 0.000 000 487 0.6200.018 0 0.000 71 0.000 254 0.000 000 394 0.5020.016 0 0.000 63 0.000 201 0.000 000 312 0.3970.014 0 0.000 55 0.000 154 0.000 000 239 0.3040.012 5 0.000 49 0.000 123 0.000 000 190 0.2420.
19、011 2 0.000 44 0.000 099 0.000 000 153 0.1940.010 0 0.000 39 0.000 079 0.000 000 122 0.155AThe inch diameters, square inch areas, and circular mil areas are rounded values calculated from the metric diameters.4. Preferred Numbers4.1 The diameters in Table 1 and preferred cross-sectionalareas in Tabl
20、e 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 significantly from the calculated numbers ofthe series used. The preferred and second preference size designations,using a Ren
21、ard series of numbers, provides a schedule of interrelated sizesfor aluminum and copper conductors.B 6822NOTE 3Should sizes be needed either larger or smaller than thoselisted in Table 1 or Table 2, the respective R series may be expandedupward or downward.5. Standard Rules for Rounding5.1 All calcu
22、lations for dimensions and properties, otherthan as provided in Section 4, shall be rounded in the finalvalues only, in accordance with the rounding method ofPractice E 29.6. Standard Round-Wire Diameters (Note 2)6.1 The standard diameters of metric sizes of wires arepreferred numbers calculated in
23、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 no more thanthree significant figures plus zeros.6.3 For wire diameters 0.050 mm and over, diameters shallbe expressed
24、 to three decimal places.6.4 For wire diameters less than 0.050 mm, diameters shallbe expressed to four decimal places.6.5 The standard diameters expressed in millimetres inaccordance with these rules and practices are given in Table 1for convenient reference.NOTE 4Solid wires of the listed diameter
25、s are used for film coating,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 PreferenceSizesCEquivalent Are
26、a,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 19.74560 1105 8.00 15.79500 9
27、86.8 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 1.243150 296.0 0.50 0.987140 276.3
28、 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.BThe sizes in these two co
29、lumns 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.B 6823as wires in some stranded conductors, and as solid conductors in someinsul
30、ated and covered conductors.7. Standard Stranded-Conductor Size Designations7.1 The standard metric size designations of stranded con-ductors and equivalent cross-sectional area are shown in Table2. Preferred and second preference sizes are preferred numbersin the R10 series up through 100 mm2and in
31、 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, but to no more decimal places than 0.01 mm2.7.3 The standard areas e
32、xpressed 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. They may be of any type ofconstruction.8. Equivalent Areas and Diamet
33、ers8.1 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 used inexpressing the standard diameters, but in no case to less th
34、anthree 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-conductor sizes in Table 1 and Table 2, and theproperties derived t
35、herefrom, 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 mayvary from the standard values depending upon the construc-tions, dia
36、meters of wire specified, and tolerances specified inproduct specifications. The use of the preferred numbers for thesize designations is intended for easier identification.10. Keywords10.1 electrical conductors; round electrical conductors;round wire; stranded conductor; stranded electrical conduct
37、orsEXPLANATORY NOTESNOTE 1The purpose of this specification is to provide logical geo-metrically progressive series of sizes for guidance to individuals andorganizations preparing hard metric specifications for all types of roundwire and stranded electrical conductors. The preferred sizes have beene
38、stablished 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 existing specifications with inch-pound units asstandard. T
39、his 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 conversion.Terminology:hard metric specificationa specification
40、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, converted from U.S.customary units, to a specification for
41、 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 for measuring the diameters of wires 0.050 mmand larger. Fo
42、r greater accuracy in obtaining the mean diameter ofultrafine wire smaller than 0.050 mm. Test Method F 205 should beconsidered satisfactory.The American Society for Testing and Materials takes no position respecting the validity of any patent rights asserted in connectionwith any item mentioned in
43、this standard. Users of this standard are expressly advised that determination of the validity of any suchpatent rights, and the risk of infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must
44、 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 Headquarters. Your comments will receive careful consideration at a meeting of the responsibletec
45、hnical committee, which you may attend. If you feel that your comments have not received a fair hearing you should make yourviews known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM, 100 Barr 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 above address or at610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website (www.astm.org).B 6824
