#### kda3310

##### Senior Member

80% of load.

318 Amps X 1.25 = 397.5 Amps

6 current carrying conductors 80%

397.5 Amps X 1.25 = 496.87 Amps

Ambient temperature correction factor THHN 90C column 100 F ambient 87%

496.87 Amps X 1.15 = 571.40 Amps

I need to size my wire for 571.40 Amps

Is this math right or am I going the wrong route with this.