According to :
A 100A circuit is going to need 4ga copper or 2-3 ga Al. That's
some huge welder.

You really need to read NEC 630 before you say this.

Yeah, I guess so. Last I looked, CEC didn't have anything on it
like this.
--
Chris Lewis, Una confibula non set est
It's not just anyone who gets a Starship Cruiser class named after them.