American Wire Gauge (AWG) Cable / Conductor Sizes and Properties
Size
(AWG
MCM)Area
circle
(mils)Concentric lay
conductorsBare conductors DC resistance Ω/M ft
at 77°F (25°C)**No. of
wiresDiameter
each wire
(inch)Diameter
(inch)Area
(sq inch)Copper Aluminum Bare Tin’d 18 1620 — — 0.0403 0.0013 6.51 6.79 10.7 16 2580 — — 0.0508 0.0020 4.10 4.26 6.72 14 4110 — — 0.0641 0.0032 2.57 2.68 4.22 12 6530 — — 0.0808 0.0051 1.62 1.68 2.66 10 10,380 — — 0.1019 0.0081 1.018 1.06 1.67 8 16,510 — — 0.1285 0.0130 0.6404 0.659 1.05 6 26,240 7 0.0612 0.184 0.027 0.410 0.427 0.674 4 41,740 7 0.0772 0.232 0.042 0.259 0.269 0.424 3 52,620 7 0.0867 0.260 0.053 0.205 0.213 0.336 2 66,360 7 0.0974 0.292 0.067 0.162 0.169 0.266 1 83,690 19 0.0664 0.332 0.087 0.129 0.134 0.211 0 105,600 19 0.0745 0.372 0.109 0.102 0.106 0.168 00 133,100 19 0.0837 0.418 0.137 0.0811 0.0843 0.133 000 167,800 19 0.0940 0.470 0.173 0.0642 0.0668 0.105 0000 211,600 19 0.1055 0.528 0.219 0.0509 0.0525 0.0836 250 250,000 37 0.0822 0.575 0.260 0.0431 0.0449 0.0708 300 300,000 37 0.0900 0.630 0.312 0.0360 0.0374 0.0590 350 350,000 37 0.0973 0.681 0.364 0.0308 0.0320 0.0505 400 400,000 37 0.1040 0.728 0.416 0.0270 0.0278 0.0442 500 500,000 37 0.1162 0.813 0.519 0.0216 0.0222 0.0354 600 600,000 61 0.0992 0.893 0.626 0.0180 0.0187 0.0295 700 700,000 61 0.1071 0.964 0.730 0.0154 0.0159 0.0253 750 750,000 61 0.1109 0.998 0.782 0.0144 0.0148 0.0236 800 800,000 61 0.1145 1.030 0.833 0.0135 0.0139 0.0221 900 900,000 61 0.1215 1.090 0.933 0.0120 0.0123 0.0197 1000 1,000,000 61 0.1280 1.150 1.039 0.0108 0.0111 0.0177 1250 1,250,000 91 0.1172 1.289 1.305 0.00863 0.00888 0.0142 1500 1,500,000 91 0.1284 1.140 1.561 0.00719 0.00740 0.0118 1750 1,750,000 127 0.1174 1.526 1.829 0.00616 0.00634 0.0101 2000 2,000,000 127 0.1255 1.630 2.087 0.00539 0.00555 0.00885 ** The resistance values given in the last three columns apply only to direct current. When using conductors larger than number 4/0 with alternating current, use the multiplying factors in the table below to compensate for skin effect.
Multiplying Factors for Converting Resistance
to 60-Hertz AC Resistance
Size Multiplying factor For nonmetallic sheathed
cables in air or
nonmetallic conduitsFor metallic sheathed cables
or all cables in
metallic racewaysCopper Aluminum Copper Aluminum Up to 3 AWG 1.000 1.000 1.00 1.00 Up to 2 AWG 1.000 1.000 1.01 1.00 Up to 1 AWG 1.000 1.000 1.01 1.00 0 1.001 1.000 1.02 1.00 00 1.001 1.001 1.03 1.00 000 1.002 1.001 1.04 1.01 0000 1.004 1.002 1.05 1.01 250 MCM 1.005 1.002 1.06 1.02 300 MCM 1.006 1.003 1.07 1.02 350 MCM 1.009 1.004 1.08 1.03 400 MCM 1.011 1.005 1.10 1.04 500 MCM 1.018 1.007 1.13 1.06 600 MCM 1.025 1.010 1.16 1.08 700 MCM 1.034 1.013 1.19 1.11 750 MCM 1.039 1.015 1.21 1.12 800 MCM 1.044 1.017 1.22 1.14 1000 MCM 1.067 1.026 1.30 1.19 1250 MCM 1.102 1.040 1.41 1.27 1500 MCM 1.142 1.058 1.53 1.36 1750 MCM 1.185 1.079 1.67 1.46 2000 MCM 1.233 1.100 1.82 1.56