| AWG wire
size (solid) |
Area
CM* |
Resistance per
1000 ft (ohms) @ 20 C |
Diameter
(inches) |
Maximum current**
(amperes) |
| 0000 |
211600 |
0.049 |
0.46 |
380 |
| 000 |
167810 |
0.0618 |
0.40965 |
328 |
| 00 |
133080 |
0.078 |
0.3648 |
283 |
| 0 |
105530 |
0.0983 |
0.32485 |
245 |
| 1 |
83694 |
0.124 |
0.2893 |
211 |
| 2 |
66373 |
0.1563 |
0.25763 |
181 |
| 3 |
52634 |
0.197 |
0.22942 |
158 |
| 4 |
41742 |
0.2485 |
0.20431 |
135 |
| 5 |
33102 |
0.3133 |
0.18194 |
118 |
| 6 |
26250 |
0.3951 |
0.16202 |
101 |
| 7 |
20816 |
0.4982 |
0.14428 |
89 |
| 8 |
16509 |
0.6282 |
0.12849 |
73 |
| 9 |
13094 |
0.7921 |
0.11443 |
64 |
| 10 |
10381 |
0.9989 |
0.10189 |
55 |
| 11 |
8234 |
1.26 |
0.09074 |
47 |
| 12 |
6529 |
1.588 |
0.0808 |
41 |
| 13 |
5178.4 |
2.003 |
0.07196 |
35 |
| 14 |
4106.8 |
2.525 |
0.06408 |
32 |
| 15 |
3256.7 |
3.184 |
0.05707 |
28 |
| 16 |
2582.9 |
4.016 |
0.05082 |
22 |
| 17 |
2048.2 |
5.064 |
0.04526 |
19 |
| 18 |
1624.3 |
6.385 |
0.0403 |
16 |
| 19 |
1288.1 |
8.051 |
0.03589 |
14 |
| 20 |
1021.5 |
10.15 |
0.03196 |
11 |
| 21 |
810.1 |
12.8 |
0.02846 |
9 |
| 22 |
642.4 |
16.14 |
0.02535 |
7 |
| 23 |
509.45 |
20.36 |
0.02257 |
4.7 |
| 24 |
404.01 |
25.67 |
0.0201 |
3.5 |
| 25 |
320.4 |
32.37 |
0.0179 |
2.7 |
| 26 |
254.1 |
40.81 |
0.01594 |
2.2 |
| 27 |
201.5 |
51.47 |
0.0142 |
1.7 |
| 28 |
159.79 |
64.9 |
0.01264 |
1.4 |
| 29 |
126.72 |
81.83 |
0.01126 |
1.2 |
| 30 |
100.5 |
103.2 |
0.01002 |
0.86 |
| 31 |
79.7 |
130.1 |
0.00893 |
0.7 |
| 32 |
63.21 |
164.1 |
0.00795 |
0.53 |
| 33 |
50.13 |
206.9 |
0.00708 |
0.43 |
| 34 |
39.75 |
260.9 |
0.0063 |
0.33 |
| 35 |
31.52 |
329 |
0.00561 |
0.27 |
| 36 |
25 |
414.8 |
0.005 |
0.21 |
| 37 |
19.83 |
523.1 |
0.00445 |
0.17 |
| 38 |
15.72 |
659.6 |
0.00396 |
0.13 |
| 39 |
12.47 |
831.8 |
0.00353 |
0.11 |
| 40 |
9.89 |
1049 |
0.00314 |
0.09 |
|
*The AWG system states areas of round copper wires in "circular mils", which is the square of the diameter in mils. 1 mil =.001 inch.
This data from Floyd, Electric Circuit Fundamentals, 2nd Ed.
**Maximum current for chassis wiring. Data from Handbook of Electronic Tables and Formulas for American Wire Gauge. The maximum current for power transmission is less. |