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Registered
Join Date: Jan 2002
Location: Long Beach CA, the sewer by the sea.
Posts: 38,179
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Most small welders of the MIG and stick variety work fine on 50A. 30A is small but unless you crank that MIG up to weld 1/4" plate and rolled stock, it won't draw enough to pop the breaker.
And if it was rated only 25A to begin with, I'd say duty cycle is the only consideration and the machine will turn itself off.
I'm going to reiterate: make up an extension that will reach a few feet into the driveway out of heavy ga. wire and eat the cost of the various parts. Life will be easy.
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