I picked up a little Miller spotwelder recently. It runs on 117VAC power
but it calls for a 30A circuit. I know I'm probably being a nervous Nell
but I'm wondering what bad thing could happen if I hook it up to a 20A
circuit just to try it out? It will only draw power for maybe 2 seconds,
not enough time for any wire to get very warm, and the worst it could do
is blow the breaker, right?

It's just a chicken and egg thing. I haven't decided yet if I want to sell
it or keep it and I don't want to put in another electrical circuit if I'm
going to sell it and to find out if I like using it I have to power it up ..

Grant