Puts out lots of RF interference on cordless phones and radios in the shop, says the owner. Was told to ground the neg. side of the output of the welder (a TIG uses AC not DC to weld???---is this correct?) to a ground rod driven thru a hole drilled in the slab. Sound right? Sales person says not to hook it to my system ground which already grounds the chassis of the machine, but hook it directly to the "work" electrode.
