Sort of;

my larger spot welder is rated at 19,000 amps at the secondary coil, but that translates to a 30 amp 208/3/60 service. My smaller Miller unit takes a 20amp breaker.

I don't know what those little ones are rated at, but while the amperage of the welder is part of the equation, we simply adjust the weld time to deal with most thicknesses of sheet metal.

I also question whether or not most mopars have 18ga exterior panels.....the few I micrometered didn't; 20-22ga IIRC.

I wouldn't trust some hobbiest spot welder on subframes, K frames or the like, but I'm sure most decent ones don't have a problem with outer body panels....course you have to make sure the metal is clean, contact is tight with adequate pressure and the tips are in good shape....


Dave