On a side, got to try that at school the other day to test a welder. It had been blowing breakers as snacks so the electricians wanted to probe it for amp readings. 1/8 7018 at 120'ish and it pulled 70 amps at the breaker. Biggest rod in the parts room @ 180'ish and it pulled 102 amps at the breaker, Electricians eyes almost popped out of his head, I think that made his day too.
By the way, doesn't that number sound a little high, welder is an old Dialarc 250 AC/DC?