NEC 1999: Chapter 9 Table 5
Dimensions of Insulated Conductors and Fixture Wires | ||||||
SIZE | WIRE TYPE | |||||
AWG or kcmil | THW/THHW | XHH/XHHW | THHN/THWN | |||
Diam(in) | Area(in²) | Diam(in) | Area(in²) | Diam(in) | Area(in²) | |
18 | — | — | — | — | — | — |
16 | — | — | — | — | — | — |
14 | 0.163 | 0.0209 | 0.133 | 0.0139 | 0.111 | 0.0097 |
12 | 0.182 | 0.0260 | 0.152 | 0.0181 | 0.13 | 0.0133 |
10 | 0.206 | 0.0333 | 0.176 | 0.0243 | 0.164 | 0.0211 |
8 | 0.266 | 0.0556 | 0.236 | 0.0437 | 0.216 | 0.0366 |
6 | 0.304 | 0.0726 | 0.274 | 0.059 | 0.254 | 0.0507 |
4 | 0.352 | 0.0973 | 0.322 | 0.0814 | 0.324 | 0.0824 |
3 | 0.380 | 0.1134 | 0.35 | 0.0962 | 0.352 | 0.0973 |
2 | 0.412 | 0.1333 | 0.382 | 0.1146 | 0.384 | 0.1158 |
1 | 0.492 | 0.1901 | 0.442 | 0.1534 | 0.446 | 0.1562 |
1/0 | 0.532 | 0.2223 | 0.482 | 0.1825 | 0.486 | 0.1855 |
2/0 | 0.578 | 0.2624 | 0.528 | 0.219 | 0.532 | 0.2223 |
3/0 | 0.63 | 0.3117 | 0.58 | 0.2642 | 0.584 | 0.2679 |
4/0 | 0.688 | 0.3718 | 0.638 | 0.3197 | 0.642 | 0.3237 |
250 | 0.765 | 0.4596 | 0.705 | 0.3904 | 0.711 | 0.397 |
300 | 0.82 | 0.5281 | 0.76 | 0.4536 | 0.766 | 0.4608 |
350 | 0.871 | 0.5958 | 0.811 | 0.5166 | 0.817 | 0.5242 |
400 | 0.918 | 0.6619 | 0.858 | 0.5782 | 0.864 | 0.5863 |
500 | 1.003 | 0.7901 | 0.943 | 0.6984 | 0.949 | 0.7073 |
600 | 1.113 | 0.9729 | 1.053 | 0.8709 | 1.051 | 0.8676 |
700 | 1.184 | 1.101 | 1.124 | 0.9923 | 1.122 | 0.9887 |
750 | 1.218 | 1.1652 | 1.158 | 1.0532 | 1.156 | 1.0496 |
800 | 1.25 | 1.2272 | 1.19 | 1.1122 | 1.188 | 1.1085 |
900 | 1.314 | 1.3561 | 1.254 | 1.2351 | 1.252 | 1.2311 |
1000 | 1.372 | 1.4784 | 1.312 | 1.3519 | 1.31 | 1.3478 |
1250 | 1.539 | 1.8602 | 1.479 | 1.718 | — | — |
1500 | 1.662 | 2.1695 | 1.602 | 2.0157 | — | — |
1750 | 1.776 | 2.4773 | 1.716 | 2.3127 | — | — |
2000 | 1.882 | 2.7818 | 1.822 | 2.6073 | — | — |
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