I guess you are talking about a bloody big industrial welder - here in Oz
we are on 240v (though my supply is around 220v) and most home welders run
off either a 10amp or 15amp outlet. My mig and my stick welder both run
off a 15 amp outlet (not at the same time of course)

The big boy welders in factories tend to use 440v 3 phase

David - who doesn't know much about welding, but a little about
electricity

Intrepid wrote


Don't do it lad. The dryer outlet is usually only rated for 20 amps.
For a 220v welder you'll likely need 50 amps.