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Randell Tarin 02-06-2008 10:34 PM

220V Welding Circut
I'm wanting to put a 220V circuit in my workshop for a future stick welding unit I plan to purchase. The sizing of the conductor and the size of the breaker will be dependent on the unit I end up buying (haven't chosen one yet).

What besides a nearby disconnect should I consider for such an installation?

goose134 02-06-2008 11:24 PM

I think as long as you cover the specs on the welder you choose you should be OK. Beyond voltage and current, there is little else to do about portable welders. Electrically speaking.

Speedy Petey 02-07-2008 07:01 AM

The typical stick welder, and many migs, will need a 50A-250v receptacle. This is pretty standard in the industry.

For a home I would use 6/2NM if the wire will be concealed.

Some will tell you you can use smaller wire. In a residential setting I disagree. Who know what someone will plug in later on.

J. V. 02-07-2008 10:37 AM

Goose is correct. The welder will come with instructions on wire size, breaker size etc...
Welders are not rated for continuous duty. You may be able to use smaller wire and breaker if you follow the manufacturers instructions. Don't install anything until you know what the welder specs are. Google the one you are getting.

Stubbie 02-07-2008 10:51 AM

Yes I would absolutely agree with Speedy that in a residential setting just run the branch circuit he suggested. The receptacle itself is pretty much dependant on the welder you purchase. Now if you would happen to buy a welder with cord and plug attached this will pretty much eliminate any gray areas. As far as Welding itself it boils down to what your wanting to weld. Most residential applications is mild steel, then it becomes a matter of what thickness of steel you want to weld. So you need to look at a couple things one is duty cycles , one is what thickness will the welder properly apply its bead, one is do you want aluminum capability, and do you want AC/DC abilities from your stick welder.
I would seriously consider a wire welder over a stick but that is your call. You will need to spend more bucks and there will be an inert gas tank involved to shield the arc or if your going to weld outside in the wind you can change to flux core wire. You have much more control over small thickness mower decks and that sort of thing.
Something like the "old standby" Lincoln 225 AC/DC stick welder is the most common 'stick' welder you will see on farms IMO. These are 20% duty cycle and can weld 1/2" mild steel, but they are not real friendly with small thicknesses. You need to be very good with one to weld gauge steel with them.

Since you are the inquisitive type the below thread shows the alternative method for calculating branch circuits for a arc welder in order to use smaller wire but it is generally reserved for commercial applications IMO. Most new welders have internal duty cycle protection so this method would work for you if you choose. As Speedy says you need to have control over what is plugged into that circuit because when you use this type method it is designed to the duty cycle of the welder and anything else plugged in like a heater or something will overheat the wiring. Remember if the welder comes with cord and plug let that be your guide not his alternative method.

Randell Tarin 02-07-2008 03:54 PM


Originally Posted by Stubbie (Post 95750)
I would seriously consider a wire welder over a stick but that is your call.

I had considered that. My training is with stick and oxy-acetylene welding; but I'm sure I could pick up wire welding without difficulty. Most of what I'll be doing is small repair stuff around the place. I'll definitely choose to go with something that's AC/DC just because it gives you a wider choice of electrodes.

I'm looking at one of the smaller units from Lincoln Electric.

Kingsmurf 02-07-2008 04:29 PM

elctrically well covered by the sparkys in here I can add but this . .have this much additional service in the current supply? . . .or will breakers start popping when you add this load? . .worse case is you might have to juggle usage if that happens . . .

add convenice . . .generally the cord on the welder is SHORT . .if its a corded model . .and most res types are that I have had to supply

just hope I am not watching the game next door when you're welding


Randell Tarin 02-07-2008 04:42 PM

I'm going to rig up a generator to a stationary bicycle and have my wife pedal as I weld.

220/221 02-07-2008 06:27 PM

I could never stick weld worth a crap but those new 120V lincoln wire welders make it easy. Add the self dimming mask and a monkey can do it.

Randell Tarin 02-07-2008 07:42 PM

I took a welding class at the community college. I'm actually pretty good. I could have taken a welding job, but heck I'm retired.:thumbup:

I have one of those auto-darken hoods. They are good.

jbfan 02-07-2008 09:39 PM


Originally Posted by Randell Tarin (Post 95828)
I'm going to rig up a generator to a stationary bicycle and have my wife pedal as I weld.

Unless your wife can pedal like Lance, I'm not sure you will get a spark between the two of you!:jester:

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