ECN Forum Forums General Topics of the Trade General Discussion Area Is this an unsafe practice?

Thanks for the responses guys. I needed to confirm this before I take it up with him. He did indeed pull a ground wire, as the conduit is piped into a fiberglass control cabinet and is not actually grounded. Can using the ground wire like this create differences in ground potential? It Looks to be about 80 feet from the machine to the service panel.

Especially bad about this practice: should the ground ever get loose, this will result in the case being live at 120V! That's why the TN-C systems (using a combined ground/neutral with a bonding jumper at every receptacle and light fixture) have been banned in Europe years ago!