Carter wrote: Millers specs on the 140 call for a 20 amp circuit. You may get by on less but be careful where you plug it in.
Jim
A buddy of mine has one in his shop about 100 ft. from his house. The entire shop is on a 20A circuit run from the breaker box in the house. When I was showing him how to use the welder we had to dial the power down to around 25% or so to keep from tripping the breaker. The wiring run was just too long and probably too small to begin with...