So now comes the question. I now have the power for my welder which needs 120 amps. I don't really want to hard wire it but it seems to be the only option. Unless someone knows of an affordable single phase 120amp plug and recepticle.
"Affordable" being the key word. What machine needs 120 Amps continuous? I could understand a 120 amp "in rush" but not continuous.
I've tripped a lot of 50 and 75 Amp breakers by getting too aggressive on the pedal at the start, 100 Amp solved that.
I hard wire mine (Miller Syncrowave 250) but with a 35' flexible cord, so I can roll it anywhere in the shop (Single Phase, 100 Amp breaker). Our Miller Dynasty 700 at work is done the same way but with a 50' cord and a Single Phase, 100 Amp Breaker. FWIW
The largest receptacle I've used / bought was 60 Amp and they are at least $300 for the male and female pair (previous job). You can buy many of feet of flexible cord for that. I think mine is four conductor #4 (IIRC). I can look if you want.