The welder will never pull anywhere near 30. Probably will never reach 20.
They are severely overrated. Just FYI

--
Steve Barker


"Joe" wrote in message
. ..
My compressor draws 20 amps, my welder 30, and I'd like to install a
wall-unit AC/heater, which I'm guessing will be 20-30 amps. It is
conceivable that they might all run at once on occasion. Or maybe 100 amps
is overkill--I'd just rather have too much than too little.