Have an old craftsman mig welder, the wire arcs out when it touches metal, whether the metal is grounded or not. If you feed the wire out of the wand a quarter inch or ten inches, as soon as it touches any metal, it arcs itself out all the way back to the wand tip
Welding Tools - Clarke Power Products - Clarke 130EN Mig 110 Volt
Answers & Comments
Unfortunatly many low cost MIG systems have live torches, check the instructions to confirm.