400 kcmil wire specs

335 A

400 kcmil copper at 75 °C · 280 A at 60 °C · 380 A at 90 °C · aluminum 270 A at 75 °C

Voltage drop of 400 kcmil copper

One-way	10 A	15 A	20 A	30 A	50 A
25 ft	0.02 V	0.02 V	0.03 V	0.05 V	0.08 V
50 ft	0.03 V	0.05 V	0.06 V	0.10 V	0.16 V
100 ft	0.06 V	0.10 V	0.13 V	0.19 V	0.32 V
150 ft	0.10 V	0.14 V	0.19 V	0.29 V	0.48 V
200 ft	0.13 V	0.19 V	0.26 V	0.39 V	0.64 V

Single-phase, DC resistance 0.0321 Ω/1000 ft (Cu) / 0.0529 Ω (Al).

How many amps can 400 kcmil wire carry?

Copper 400 kcmil: 280 A at 60 °C, 335 A at 75 °C, 380 A at 90 °C.

Free calculator by WireMath