ECN Forum Forums General Topics of the Trade General Discussion Area 350 mcm for 300 amps?

I accidentally clicked post before I finished typing………

I will admit that all of the THHN I have seen is also rated as THWN but THWN is also only rated as a 75C conductor unless it’s THWN-2. You still can not use the 90C column if your terminals are only rated for 75C.

Curt