What do I need to run a 100 amp hobby welder?

hehe 20 amp circuit. OK! Look if an electrician really knows what he is doing he would go to the nameplate. Find the duty cycle rating on the nameplate. Go to Article 630 in the NEC. Use the duty cycle to find the circuit ampacity needed by multiplication of the code book demand factor by the nameplate amperage. The same would apply to the circuit breaker size. So why dont you just put it on a 100 amp breaker, with a plug and call it a day. Also dont try to use the generator it will not work for it.

I have no real clue but can’t wait to see the answers.

You will need at least a 20 amp circuit to prevent your breaker tripping. And yes a 2000 watt generator should be able to power it.

Make sure nothing else is on that circuit or the breaker will probably trip.

if your positive its a 100 amp 110 volt then you use omhs law.amps x volts = watts. so that would be 11000 watts.breaker size has to be the same as the amps your pulling never smaller or you will trip the breaker.very important to use the correct wire size that can handle 100 amps safely without ruining the insulation.yes it needs to be on its own dedicated circuit.if your using this welder for three hours or more at one time you should use 125amp breaker and wire that can handle 125amps.

There should be a label on the back of the welder that has an amp rating. This will tell you how many amps it pulls at max. If you multiply the amps x voltage = watts consumed
20 amps x 110 volts = 2200 watts so as long as the amp rating on the label is less than 15 amps that generator will work (but at its max). As far as plugging it in, it should be on its. own circuit. I hope this helps

People telling you to get a 100amp breaker for a 100amp welder are dead wrong. That’s not how this game works.

Those little 110V welders are designed for home use, and the only time you’re going to find a breaker bigger than 50A in a home power box is on the mains.

For the 100A welder, a 30A circuit should suffice, assuming the wire in the wall is sufficiet to carry the 30A load.

Heck, a Lincoln AC225 (240V job) only needs a 50A breaker.

Also, Although it’s called an 110v welder, that only indicates that it requires an 110v input. The out put of the average small welder like this is 110 amps at 19.5 to 22 volts. Your 2200 watt generator will be maxed out if the welder is used on it’s highest settings.