Electrical Outlet For Welding

I have a Chicago Electric ( China) welding machine. It's a Dual Mig 131, Rated AC input 120 volts, 1 phase, 60 hertz, 21 amp. The electrical cord has a regular plug with 14AWGx3c wire. Can I install a 30 amp breaker in the main panel, and come off to a 30 amp receptecal. Then use a 50' extension cord to work outside. Would 12/3 wire be OK for the cord or would I need 10/3. Would this work OK? Any advice would be greatly appreciated. Thanks, Will

 

is the cord on the welder a factory cord? if so, thats the voltage and amperage you have to use.

 

Yes, the 14AWGx3c stamped on the welding cord is the factory cord, The welder is new and has never been used. The 21 amp input confuses me as 14/3 is not rated for that much, right. The wall sockets are 15 amp, so I couldn't use them. Any suggestions and thanks Chris75 for the reply. Will

 

The specs on most of the homeowner style welders show a fairly low duty cycle. Try the welder on a 15 Amp circuit and see if the breaker holds.

You may want to get a 20 Amp circuit to minimize voltage drop.

 

The #10 wire cord will work much better than the #12.

I have a 120V lincoln wire welder and it needs all the juice it can get. I can see a difference in performance when I use a long #12 cord vs no cord. It still works and doesn't kick the breaker but it's not as "hot" and doesn't penetrate properly.

20 amp breaker will hold but use #10 conductors and cord.

 

"They" probably rate a portable appliance pigtail quite a bit higher than electrical cable permanently installed in long runs within wood framing.

 

Thanks Guys for taking the time to comment.