Amp Chart
Amp Chart
Lead Wire Current Carrying Capacity (Ampacity)
AWG SIZE | Insulated Conductor Temperature Rating | AWG SIZE | |||||
at 80°C | at 90°C | at 105°C | at 125°C | at 150°C | at 200°C | ||
40 | 0.33 | 0.49 | 0.55 | 0.60 | 0.71 | 0.78 | 40 |
38 | 0.47 | 0.68 | 0.77 | 0.84 | 0.98 | 1.1 | 38 |
36 | 0.63 | 0.91 | 1.0 | 1.1 | 1.3 | 1.5 | 36 |
34 | 0.87 | 1.2 | 1.4 | 1.5 | 1.8 | 2.0 | 34 |
32 | 1.2 | 1.7 | 1.9 | 2.1 | 2.4 | 2.7 | 32 |
30 | 2.0 | 2.2 | 2.5 | 2.8 | 3.2 | 3.6 | 30 |
28 | 3.0 | 3.0 | 3.4 | 3.7 | 4.3 | 4.8 | 28 |
26 | 4.0 | 4.0 | 4.6 | 5.0 | 5.7 | 6.4 | 26 |
24 | 5.0 | 5.5 | 6.2 | 6.7 | 7.7 | 8.7 | 24 |
22 | 8 | 10 | 11 | 12 | 14 | 16 | 22 |
20 | 10 | 13 | 14 | 15 | 18 | 21 | 20 |
18 | 15 | 18 | 20 | 22 | 24 | 28 | 18 |
16 | 19 | 24 | 26 | 28 | 31 | 35 | 16 |
14 | 27 | 35 | 39 | 42 | 46 | 54 | 14 |
12 | 36 | 40 | 51 | 55 | 60 | 68 | 12 |
10 | 47 | 55 | 67 | 72 | 80 | 90 | 10 |
8 | 65 | 80 | 90 | 97 | 106 | 124 | 8 |
6 | 95 | 105 | 121 | 131 | 155 | 165 | 6 |
4 | 125 | 140 | 160 | 172 | 190 | 220 | 4 |
3 | 145 | 165 | 180 | 194 | 214 | 252 | 3 |
2 | 170 | 190 | 215 | 232 | 255 | 293 | 2 |
1 | 200 | 220 | 247 | 266 | 293 | 344 | 1 |
1/0 | 230 | 260 | 286 | 309 | 339 | 399 | 1/0 |
2/0 | 270 | 300 | 329 | 355 | 390 | 467 | 2/0 |
3/0 | 315 | 350 | 380 | 410 | 451 | 546 | 3/0 |
4/0 | 370 | 405 | 446 | 481 | 529 | 629 | 4/0 |
Multiply the ampacity rating from above by the correction factor listed below to determine the ampacity rating of a conductor in a multi-conductor cable.
Multiple Conductor Correction Factors | ||
Number of Conductors | Multiply ampacity by factor | |
4-6 | 0.80 | |
7-9 | 0.70 | |
10-20 | 0.50 | |
21-30 | 0.45 | |
31-40 | 0.40 | |
41+ | 0.35 |
Disclaimer: The information shown here has been assembled from sources believed to be reliable, but is not guaranteed by Cooner Wire Co. Cooner Wire Co. is not responsible for its accuracy or reliability.