ASTM B682-81A(1996)E1

Standard Specification for Standard Metric Sizes of Electrical Conductors

SCOPE
1.1 This specification prescribes the recommended standard metric sizes of solid round electrical conductors.
1.2 This specification prescribes the recommended standard metric size designations of stranded electrical conductors (see Explanatory Note 1).
Note 2--Physical properties, construction requirements, and manufacturing tolerances for specific products should be included in individual product specifications developed in accordance with appropriate sizes in this specification.
1.3 The values stated in inch-pound or SI units are to be regarded separately as standard. Each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. For conductor sizes designated by AWG or kcmil, the requirements in SI units have been numerically converted from corresponding values, stated or derived, in inch-pound units. For conductor sizes designated by SI units only, the requirements are stated or derived in SI units.

General Information

• Status: Historical
• Publication Date: 09-Mar-2001
• ICS: 29.050 - Superconductivity and conducting materials
• Technical Committee: B01 - Electrical Conductors
• Drafting Committee: B01.02 - Methods of Test and Sampling Procedure

Relations

• Replaced By: ASTM B682-01 - Standard Specification for Standard Metric Sizes of Electrical Conductors
• Effective Date: 10-Mar-2001

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn. Contact ASTM International (www.astm.org) for the latest information.
e1
Designation: B 682 – 81a (Reapproved 1996)
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
Standard Metric Sizes of Electrical Conductors
This standard is issued under the fixed designation B 682; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
e NOTE—Section 11 was added editorially in March 1996.
1. Scope F 205 Test Method for Measuring Diameter of Fine Wire by
Weighing
1.1 This specification prescribes the recommended standard
2.2 IEC Standards:
metric sizes of solid round electrical conductors.
IEC 182 Basic Dimensions of Winding Wires
1.2 This specification prescribes the recommended standard
IEC 228 Nominal Cross-Sectional Areas and Composition
metric size designations of stranded electrical conductors.
of Conductors of Insulated Cables
NOTE 1—The purpose of this specification is to provide logical geo-
2.3 ISO Standards:
metrically progressive series of sizes for guidance to individuals and
ISO R388 Metric Series for Basic Thickness of Sheet and
organizations preparing hard metric specifications for all types of round
Diameters of Wire
wire and stranded electrical conductors (see 3.1). The preferred sizes have
been established to avoid proliferation of non-preferred sizes. They
provide a series of sizes intended to be acceptable for most applications. 3. Terminology
The use of metric sizes will depend upon commercial factors, and their
3.1 Definitions of Terms Specific to This Standard:
existence does not render obsolete existing specifications with inch-pound
3.1.1 hard metric specification—a specification for bare,
units as standard. This specification and hard metric conductor specifica-
insulated, or covered electrical conductors incorporating SI
tions prepared in accordance with it are not intended to replace any of the
units as the standard, and including a series of standard sizes
existing specifications having inch-pound units as the standard, with or
without the inclusion of soft metric conversion (see 3.1.2). differing from those in inch-pound conductor specifications.
NOTE 2—Physical properties, construction requirements, and manufac-
3.1.2 soft metric conversion—The addition of SI units,
turing tolerances for specific products should be included in individual
converted from U.S. customary units, to a specification for
product specifications developed in accordance with appropriate sizes in
bare, insulated, or covered electrical conductors which includes
this specification.
the inch-pound units as the standard and retains the customary
NOTE 3—Inch-pound units shown in the tables were calculated from the
series of standard sizes.
metric values and rounded, and are shown for information only.
2. Referenced Documents 4. Standard Reference Temperature
2.1 ASTM Standards: 4.1 For the purpose of this specification, all wire dimensions
E 29 Practice for Using Significant Digits in Test Data to and properties shall be considered as occurring at the interna-
Determine Conformance with Specifications tionally standardized reference temperature of 20°C.
1 2
This specification is under the jurisdiction of ASTM Committee B-1 on Wires Annual Book of ASTM Standards, Vol 14.02.
for Electrical Conductorsand is the direct responsibility of Subcommittee B01.02on Annual Book of ASTM Standards, Vol 10.04.
Methods of Test and Sampling Procedure. International Electrotechnical Commission and International Organization for
Current edition approved Dec. 18, 1981. Published February 1982. Originally Standardization documents are available from the American National Standards
published as B 682 – 81. Last previous edition B 682 – 81. Institute (ANSI), 11 West 42nd St., 13th Floor, New York, NY 10036.
TABLE 1 Standard Metric Diameters and Cross-Sectional Areas of Solid Round Wires at 20°C
Diameter Cross-Sectional Area
A 2 2A A
mm (R 20 Series) in. mm in. kcmil
18.0 0.708 7 254.5 0.394 4 502.2
16.0 0.629 9 201.1 0.311 6 396.8
14.0 0.551 8 153.9 0.238 6 303.8
12.5 0.492 1 122.7 0.190 2 242.2
11.2 0.440 9 98.52 0.152 7 194.4
10.0 0.393 7 78.54 0.121 7 155.0
B 682
TABLE 1 Continued
Diameter Cross-Sectional Area
A 2 2A A
mm (R 20 Series) in. mm in. kcmil
9.00 0.354 3 63.62 0.098 61 125.6
8.00 0.315 0 50.27 0.077 91 99.2
7.10 0.279 5 39.59 0.061 37 78.14
6.30 0.248 0 31.17 0.048 32 61.52
5.60 0.220 5 24.63 0.038 18 48.61
5.00 0.196 9 19.63 0.030 43 38.75
4.50 0.177 2 15.90 0.024 65 31.39
4.00 0.157 5 12.57 0.019 48 24.80
3.55 0.139 8 9.898 0.015 34 19.53
3.15 0.124 0 7.793 0.012 08 15.38
2.80 0.110 2 6.158 0.009 54 12.15
2.50 0.098 4 4.909 0.007 61 9.69
2.24 0.088 2 3.941 0.006 11 7.78
2.00 0.078 7 3.142 0.004 87 6.20
1.80 0.070 9 2.545 0.003 94 5.02
1.60 0.063 0 2.011 0.003 12 3.97
1.40 0.055 1 1.539 0.002 39 3.04
1.25 0.049 2 1.227 0.001 90 2.42
1.12 0.044 1 0.985 0.001 53 1.94
1.00 0.039 4 0.785 0.001 22 1.55
0.900 0.035 4 0.636 0.000 986 1.26
0.800 0.031 5 0.503 0.000 779 0.992
0.710 0.028 0 0.396 0.000 614 0.781
0.630 0.024 8 0.312 0.000 483 0.615
0.560 0.022 0 0.246 0.000 382 0.486
0.500 0.019 7 0.196 0.000 304 0.388
0.450 0.017 7 0.159 0.000 247 0.314
0.400 0.015 7 0.126 0.000 195 0.248
0.355 0.014 0 0.099 0 0.000 153 0.195
A
cmil
0.315 0.012 4 0.077 9 0.000 121 154
0.280 0.001 0 0.061 6 0.000 095 4 122
0.250 0.009 8 0.049 1 0.000 076 1 96.9
0.224 0.008 8 0.039 4 0.000 061 1 77.8
0.200 0.007 9 0.031 4 0.000 048 7 62.0
0.180 0.007 1 0.025 4 0.000 039 4 50.2
0.160 0.006 3 0.020 1 0.000 031 2 39.7
0.140 0.005 5 0.015 4 0.000 023 9 30.4
0.125 0.004 9 0.012 3 0.000 019 0 24.2
0.112 0.004 4 0.009 85 0.000 015 3 19.4
0.100 0.003 9 0.007 85 0.000 012 2 15.5
0.090 0.003 5 0.006 36 0.000 009 86 12.6
0.080 0.003 1 0.005 03 0.000 007 79 9.92
0.071 0.002 8 0.003 96 0.000 006 14 7.81
0.063 0.002 5 0.003 12 0.000 004 83 6.15
0.056 0.002 2 0.002 46 0.000 003 82 4.86
0.050 0.002 0 0.001 96 0.000 003 04 3.88
0.045 0.001 77 0.001 59 0.000 002 47 3.14
0.040 0.001 57 0.001 26 0.000 001 95 2.48
0.036 0.001 42 0.001 02 0.000 001 58 2.01
0.032 0.001 26 0.000 804 0.000 001 25 1.59
0.028 0.001 10 0.000 616 0.000 000 954 1.22
0.025 0.000 98 0.000 491 0.000 000 761 0.969
0.022 0.000 88 0.000 394 0.000 000 611 0.778
0.020 0 0.000 79 0.000 314 0.000 000 487 0.620
0.018 0 0.000 71 0.000 254 0.000 000 394 0.502
0.016 0 0.000 63 0.000 201 0.000 000 312 0.397
0.014 0 0.000 55 0.000 154 0.000 000 239 0.304
0.012 5 0.000 49 0.000 123 0.000 000 190 0.242
0.011 2 0.000 44 0.000 099 0.000 000 153 0.194
B 682
TABLE 1 Continued
Diameter Cross-Sectional Ar
...