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Welder question not coil related



Original poster: JBarrett@xxxxxxxxxxxxxxxx

Hello,

I purchased an old Hollup welder manufactured by National Cylinder and Gas company of Chicago, Ill. This welder was bought at a swap meet in New York.

The welder works very well BUT the other day I had my hand on the housing and touched the ground clamp. OUCH! It shocked me so hard it made me sick!

I've had a couple of electricians look at my wiring in the garage and the welder. They say it is hooked up correctly. The case is not energised but the ground clamp has 120 volts to ground. The thing that confuses me the most is I can take the ground clamp and ground it out and nothing happens. No sparks, no blown breakers nothing but if I touch the ground clamp on the welder and a earth ground it bites hard.

Is the ground clamp and the equipment ground the same? There isn't continuity between the case and the ground clamp on this welder.

Any thoughts?
Jim