Wire ​Amp Chart

12/08/2021
Wire Amp Chart

Wire Ampacity Chart

Based on the 2017 N.E.C. National Electrical Code.
Ampacity is the maximum continuous current carrying capacity of a wire inside a cable or raceway. It is measured in amperes (amps). The proper amperage is determined by the size of the wire, ambient temperature, number of wires installed together, the types and number of electrical devices connected on a circuit. It is different for copper wire than Aluminum wire.

The proper wire size must be selected in order to meet the load requirements of you application. There is an additional de-rating adjustment factor that needs to be taken into account for selecting the correct wire size. The following table if offered for informational purposes only.

Wire & Cable installation can be very dangerous. Please consult a licensed electrician, the latest version of the N.E.C. National Electrical Code and your local municipal inspector for guidance on selecting and installing the proper wire for your application.

 Amp Copper
Amp Aluminum
Wire  Size60°C (140°F)
75°C (167°F)90°C (194°F)
75°C (167°F)90°C (194°F)
14 AWG
152025--
12 AWG2025302025
10 AWG3035403035
8 AWG
4050554045
6 AWG
5565755055
4 AWG
7085956575
3 AWG
851001157585
2 AWG9511513090100
1 AWG
-130145100115
1/0-150170120135
2/0-175195135150
3/0-200225155175
4/0-230260180205
250 MCM
-255290205230
300 MCM-285320230260
350 MCM
-310350250280
500 MCM
-380430310350
600 MCM
-420475340385
750 MCM
-475535385435
1000 MCM
-545615445500

* This table is offered for informational purposes only.
* Wire & Cable installation can be dangerous and hazardous. Please consult a licensed electrical professional for proper selection and installation.