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.