Standard Specification for Standard Metric Sizes of Electrical Conductors

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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


Diameter		Cross-Sectional Area
mm (R 20 Series)	in.^A	mm²	in.²^A	kcmil^A
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
				cmil^A
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

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.

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Published :	04/01/2009
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ASTM B682-01(2009) PDF

Standard Specification for Standard Metric Sizes of Electrical Conductors

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