Hi,
Thanks for the replies. I have an engineer on the job who is insiting that these welders have to have an external ground. They are fed with a 3 wire circuit..Two hots and a ground. The machine gets its ground from the source. The welders use their ground lead attached to the building steel or the work piece.
One engineer says he has the GEC and EGC in the same conduit feeding the main 480V panel..then from a breaker to that panel feeding a step down transformer..that does not have a GEC bonded to the X/O..which I have already confirmed that either building steel, water pipe or ground rod is required.
I am simply confirming that these 8 pack welders do NOT require a ground rod.
Thanks for your patience and assistance.
regards
Greg
