ASTM B682-01(2009)

Standard Specification for Standard Metric Sizes of Electrical Conductors

ABSTRACT
This specification prescribes the recommended standard metric sizes of solid round electrical conductors. The standard diameters of metric sizes of wires are preferred numbers calculated in accordance with the conventional mathematical principles. The standard metric size of stranded conductors and equivalent cross-sectional areas shall be designated.
SCOPE
1.1 This specification covers and 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 1—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 SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3.1 Exceptions — 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. Rounded values appear in Table 1.
TABLE 1 Standard Metric Diameters and Cross-Sectional Areas of Solid Round Wires at 20°C    DiameterCross-Sectional Area mm (R 20 Series)in.A mm2 in.2AkcmilA  18.00.708 7254.50.394 4502.2   16.00.629 9201.10.311 6396.8  14.00.551 8153.90.238 6303.8  12.50.492 1122.70.190 2242.2  11.20.440 9 98.520.152 7194.4   10.00.393 7 78.540.121 7155.0  9.000.354 3 63.620.098 61125.6  8.000.315 0 50.270.077 91 99.2  7.100.279 5 39.590.061 37 78.14   6.300.248 0 31.170.048 32 61.52  5.600.220 5 24.630.038 18 48.61  5.000.196 9 19.630.030 43 38.75  4.500.177 2 15.900.024 65 31.39   4.000.157 5 12.570.019 48 24.80  3.550.139 8 9.8980.015 34 19.53  3.150.124 0 7.7930.012 08 15.38  2.800.110 2 6.1580.009 54 12.15   2.500.098 4 4.9090.007 61 9.69  2.240.088 2 3.9410.006 11 7.78  2.000.078 7 3.1420.004 87 6.20  1.800.070 9 2.5450.003 94 5.02   1.600.063 0 2.0110.003 12 3.97  1.400.055 1 1.5390.002 39 3.04  1.250.049 2 1.2270.001 90 2.42  1.120.044 1 0.9850.001 53 1.94   1.000.039 4 0.7850.001 22 1.55  0.9000.035 4 0.6360.000 986 1.26  0.8000.031 5 0.5030.000 779 0.992  0.7100.028 0 0.3960.000 614 0.781   0.6300.024 8 0.3120.000 483 0.615  0.5600.022 0 0.2460.000 382 0.486  0.5000.019 7 0.1960.000 304 0.388  0.4500.017 7 0.1590.000 247 0.314   0.4000.015 7 0.1260.000 195 0.248  0.3550.014 0 0.099 00.000 153 0.195 cmilA  0.3150.012 4 0.077 90.000 121154  0.2800.001 0 0.061 60.000 095 4122   0.2500.009 8 0.049 10.000 076 1 96.9  0.2240.008 8 0.039 40.000 061 1 77.8  0.2000.007 9 0.031 40.000 048 7 62.0  0.1800.007 1 0.025 40.000 039 4 50.2   0.1600.006 3 0.020 10.000 031 2 39.7  0.1400.005 5 0.015 40.000 023 9 30.4  0.1250.004 9 0.012 30.000 019 0 24.2  0.1120.004 4 0.009 850.000 015 3 19.4   0.1000.003 9 0.007 850.000 012 2 15.5  0.0900.003 5 0.006 360.000 009 86 12.6  0.0800.003 1 0.005 030.000 007 79 9.92  0.0710.002 8 0.003 960.000 006 14 7.81   0.0630.002 5 0.003 120.000 004 83 6.15  0.0560.002 2 0.002 460.000 003 82 4.86  0.0500.002 0 0.001 960.000 003 04 3.88  0.045 0.001 77 0.001 590.000 002 47 3.14  0.040 0.001 57 0.001 260.000 001 95 2.48  0.036 0.001 42 0.001 020.000 001 58 2.01  0.032 0.001 26 0.000 8040.000 001 25 1.59  0.028 0.001 10 0.000 6160.000 000 954 1.22   0.025 0.000 98 0.000 4910.000 000 761 0.969  0.022 0.000 88 0.000 3940.000 000 611 0.778  0.020 0 0.000 79 0.000 3140.000 000 487 0.620  0.018 0 0.000 71 0.000 2540.000 000 394 0.502   0.016 0 0.000 63 0.000 2010.000 000 312 0.397  0.014 0 0.000 55 0.000 1540.000 000 239 0.304  0.012 5 0.000 49 0.000 1230.000 000 190 0.242  0.011 2 0.000 44 0.000 0990.000 000 153 0.194   0.010 0 0.000 39 0.000 0790.000 000 122 0.155
A The inch diameters, square inch a...

General Information

• Status: Historical
• Publication Date: 31-Mar-2009
• ICS: 29.050 - Superconductivity and conducting materials
• Technical Committee: B01 - Electrical Conductors
• Drafting Committee: B01.02 - Methods of Test and Sampling Procedure

Relations

• Replaces: ASTM B682-01 - Standard Specification for Standard Metric Sizes of Electrical Conductors
• Effective Date: 01-Apr-2009
• Replaced By: ASTM B682-01(2009)e1 - Standard Specification for Standard Metric Sizes of Electrical Conductors
• Effective Date: 01-Apr-2009
• Referred By: ASTM B231/B231M-16(2021) - Standard Specification for Concentric-Lay-Stranded Aluminum 1350 Conductors
• Effective Date: 01-Apr-2009
• Referred By: ASTM B524/B524M-23 - Standard Specification for Concentric-Lay-Stranded Aluminum Conductors, Aluminum-Alloy Reinforced (ACAR, 1350/6201)
• Effective Date: 01-Apr-2009
• Referred By: ASTM B609/B609M-12(2021) - Standard Specification for Aluminum 1350 Round Wire, Annealed and Intermediate Tempers, for Electrical Purposes
• Effective Date: 01-Apr-2009
• Referred By: ASTM B399/B399M-23 - Standard Specification for Concentric-Lay-Stranded Aluminum-Alloy 6201-T81 and 6201-T83 Conductors
• Effective Date: 01-Apr-2009

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
Designation:B682 −01(Reapproved 2009)
Standard Specification for
Standard Metric Sizes of Electrical Conductors
This standard is issued under the fixed designation B682; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2.3 ISO Standards:
ISO R388 Metric Series for Basic Thickness of Sheet and
1.1 This specification covers and prescribes the recom-
Diameters of Wire
mended standard metric sizes of solid round electrical conduc-
tors.
3. Standard Reference Temperature
1.2 This specification prescribes the recommended standard
3.1 Forthepurposeofthisspecification,allwiredimensions
metric size designations of stranded electrical conductors (see
and properties shall be considered as occurring at the interna-
Explanatory Note 1).
tionally standardized reference temperature of 20°C.
NOTE 1—Physical properties, construction requirements, and manufac-
turing tolerances for specific products should be included in individual
4. Preferred Numbers
product specifications developed in accordance with appropriate sizes in
this specification.
4.1 The diameters in Table 1 and preferred cross-sectional
1.3 The values stated in SI units are to be regarded as areas in Table 2 are rounded preferred numbers from R
standard. No other units of measurement are included in this (Renard) series in accordance with ISO R388.
standard.
NOTE 2—The use of preferred numbers has many advantages and the
1.3.1 Exceptions — For conductor sizes designated by
values selected do not vary significantly from the calculated numbers of
AWG or kcmil, the requirements in SI units have been
the series used. The preferred and second preference size designations,
using a Renard series of numbers, provides a schedule of interrelated sizes
numerically converted from corresponding values, stated or
for aluminum and copper conductors.
derived,ininch-poundunits.Forconductorsizesdesignatedby
NOTE 3—Should sizes be needed either larger or smaller than those
SI units only, the requirements are stated or derived in SI units.
listed in Table 1 or Table 2, the respective R series may be expanded
Rounded values appear in Table 1.
upward or downward.
2. Referenced Documents
5. Standard Rules for Rounding
2.1 ASTM Standards:
5.1 All calculations for dimensions and properties, other
E29 Practice for Using Significant Digits in Test Data to
than as provided in Section 4, shall be rounded in the final
Determine Conformance with Specifications
values only, in accordance with the rounding method of
F205 Test Method for Measuring Diameter of Fine Wire by
Practice E29.
Weighing
2.2 IEC Standards:
6. Standard Round-Wire Diameters (Note 2)
IEC 182 Basic Dimensions of Winding Wires
6.1 The standard diameters of metric sizes of wires are
IEC228 NominalCross-SectionalAreasandCompositionof
preferred numbers calculated in accordance with the conven-
Conductors of Insulated Cables
tional mathematical principles of an R series of 20 numbers
from 1 to 10 with multiples and submultiples of 10.
This specification is under the jurisdiction of ASTM Committee B01 on
6.2 The wire diameters shall be expressed to no more than
Electrical Conductorsand is the direct responsibility of Subcommittee B01.02 on
three significant figures plus zeros.
Methods of Test and Sampling Procedure.
Current edition approved April 1, 2009. Published May 2009. Originally
6.3 For wire diameters 0.050 mm and over, diameters shall
approved in 1981. Last previous edition approved in 2001 as B682 – 01. DOI:
be expressed to three decimal places.
10.1520/B0682-01R09.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.4 For wire diameters less than 0.050 mm, diameters shall
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
be expressed to four decimal places.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
6.5 The standard diameters expressed in millimetres in
International Electrotechnical Commission and International Organization for
accordance with these rules and practices are given in Table 1
Standardization documents are available from the American National Standards
Institute (ANSI), 11 West 42nd St., 13th Floor, New York, NY 10036. for convenient reference.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
B682−01 (2009)
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
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
B682−01 (2009)
TABLE1 Continued
Diameter Cross-Sectional Area
A 2 2A A
mm (R 20 Series) in. mm in. kcmil
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
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
´1
Designation:B 682–81a (Reapproved 1996) Designation: B 682 – 01 (Reapproved
2009)
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 (´) indicates an editorial change since the last revision or reapproval.
´ NOTE—Section 11 was added editorially in March 1996.
1. Scope
1.1This specification prescribes the recommended standard metric sizes of solid round electrical conductors.
1.2This specification prescribes the recommended standard metric size designations of stranded electrical conductors.
NOTE1—The purpose of this specification is to provide logical geometrically progressive series of sizes for guidance to individuals and organizations
preparing hard metric specifications for all types of round 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. The use of metric sizes will
depend upon commercial factors, and their existence does not render obsolete existing specifications with inch-pound units as standard.This specification
and hard metric conductor specifications prepared in accordance with it are not intended to replace any of the existing specifications having inch-pound
units as the standard, with or without the inclusion of soft metric conversion (see 3.1.2
1.1 This specification covers and 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).
NOTE2—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.
NOTE3—Inch-pound units shown in the tables were calculated from the metric values and rounded, and are shown for information only. 1—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 SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3.1 Exceptions — 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. Rounded values appear in Table 1.
2. Referenced Documents
2.1 ASTM Standards:
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
F 205 Test Method for Measuring Diameter of Fine Wire by Weighing
2.2 IEC Standards:
IEC 182 Basic Dimensions of Winding Wires
IEC 228 Nominal Cross-Sectional Areas and Composition of Conductors of Insulated Cables
2.3 ISO Standards:
ISO R388 Metric Series for Basic Thickness of Sheet and Diameters of Wire
3. Terminology
3.1Definitions of Terms Specific to This Standard:
This specification is under the jurisdiction of ASTM Committee B-1 B01 on Wires for Electrical Conductors and is the direct responsibility of Subcommittee B01.02
on Methods of Test and Sampling Procedure.
Current edition approved Dec. 18, 1981. Published February 1982. Originally published as B682–81. Last previous edition B682–81.
Current edition approved April 1, 2009. Published May 2009. Originally approved in 1981. Last previous edition approved in 2001 as B 682 – 01.
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
, Vol 14.02.volume information, refer to the standard’s Document Summary page on the ASTM website.
Annual Book of ASTM Standards, Vol 10.04.
International Electrotechnical Commission and International Organization for Standardization documents are available from the American National Standards Institute
(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 States.
B 682 – 01 (2009)
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
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
B 682 – 01 (2009)
TABLE 1 Continued
Diameter Cross-Sectional Area
A 2 2A A
mm (R 20 Series) in. mm in. kcmil
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
0.010 0 0.000 39 0.000 079 0.000 000 122 0.155
A
The inch diameters, square inch areas, and circular mil areas are rounded values calculated from the metric diameters.
3.1.1hard metric specification—a specification for bare, insulated, or covered electrical conductors incorporating SI units as the
standard, and including a series of standard sizes differing from those in inch-pound conductor specifications.
3.1.2soft metric conversion—TheadditionofSIunits,convertedfromU.S.customaryunits,toaspecificationforbare,insulated,
or covered electrical conductors which includes the inch-pound units as the standard and retains the customary series of standard
sizes.
4.Standard Reference Temperature
4.1Forthepurposeofthisspecification,allwiredimensionsandpropertiesshallbeconsideredasoccurringattheinternationally
standardized reference temperature of 20°C.
TABLE 1Standard 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 0.7087 254.5 0.3944 502.2
16.0 0.6299 201.1 0.3116 396.8
14.0 0.5518 153.9 0.2386 303.8
12.5 0.4921 122.7 0.1902 242.2
11.2 0.4409 98.52 0.1527 194.4
10.0 0.3937 78.54 0.1217 155.0
9.00 0.3543 63.62 0.09861 125.6
8.00 0.3150 50.27 0.07791 99.2
7.10 0.2795 39.59 0.06137 78.14
6.30 0.2480 31.17 0.04832 61.52
5.60 0.2205 24.63 0.03818 48.61
5.00 0.1969 19.63 0.03043 38.75
4.50 0.1772 15.90 0.02465 31.39
4.00 0.1575 12.57 0.01948 24.80
3.55 0.1398 9.898 0.01534 19.53
3.15 0.1240 7.793 0.01208 15.38
2.80 0.1102 6.158 0.00954 12.15
2.50 0.0984 4.909 0.00761 9.69
2.24 0.0882 3.941 0.00611 7.78
2.00 0.0787 3.142 0.00487 6.20
1.80 0.0709 2.545 0.00394 5.02
1.60 0.0630 2.011 0.00312 3.97
1.40 0.0551 1.539 0.00239 3.04
1.25 0.0492 1.227 0.00190 2.42
1.12 0.0441 0.985 0.00153 1.94
1.00 0.0394 0.785 0.00122 1.55
0.900 0.0354 0.636 0.000986 1.26
0.800 0.0315 0.503 0.000779 0.992
0.710 0.0280 0.396 0.000614 0.781
0.630 0.0248 0.312 0.000483 0.615
0.560 0.0220 0.246 0.000382 0.486
0.500 0.0197 0.196 0.000304 0.388
B 682 – 01 (2009)
TABLE 1 Continued
Diameter Cross-Sectional Area
A 2 2A A
mm (R 20 Series) in. mm in. kcmil
0.450 0.0177 0.159 0.000247 0.314
0.400 0.0157 0.126 0.000195 0.248
0.355 0.0140 0.0990 0.000153 0.195
A
cmil
0.315 0.0124 0.0779 0.000121 154
0.280 0.0010 0.0616 0.0000954 122
0.250 0.0098 0.0491 0.0000761 96.9
0.224 0.0088 0.0394 0.0000611 77.8
0.200 0.0079 0.0314 0.0000487 62.0
0.180 0.0071 0.
...