320 amp service

[frenchelectrican]

you should use 2 600kcmil al and a 400kcmil al for your line side. Then 2- 4/0 al seu for your loadside. What people fail to realize is that 4/0 seu / ser is good for 200 amps if using for residential use but must be derated at 60 deg to 150 amps if used for commercial use only not residential.

Mike.,

If you don't mind explaing about the SER conductor rating and there is a diffrence between the service entrance and feeder conductors that is complety diffrent track to deal with it.

Merci,Marc

Oh yeah.,, I am with Iwire's side with this question