I use the 240 volt 20 amp outlet mates with nema l14 20p.
Running arc welder off generator.
After that it is the same as normal.
The arc voltaqe is on the order of 30 volts when your welding stuck shorted it s zero and thats when the generator gets real unhappy.
To successfully run your ac dc 225 125 welder you would need a minimum of a 15 000 watt ac generator.
At weldclass we recognise that many operators especially in rural construction and maintenance industries have the need to run their welder off a generator.
The biggest problem i had was adapting the generator to the welder plug.
Stick welding from the generator sucks.
If you are fortunate to establish an arc the arc will tend to pop out frequently.
You strike an arc then have to maintain it really tight while the genny sees the load and revs up.
The generator is breaker protected.
I would avoid running any of the new computer controlled mig or tig stuff off a normal generator.
You can run a small inverter welder off of a moderately sized generator as they only draw about half the amperage of a comparable transformer based welder.