Bootleg Ground, Built that Way

[dbuckley]

There is no incoming neutral. There is just 480 three phase with a grounding conductor. Is your concern still valid?

Nope. Its carts with neutrals and improper grounds that are the risk.

Just checking though: as the receptacles have a ground pin that works and there is a transformer in the cart you have a SDS, and therefore the receptacle grounds should be connected to the ground supplying the cart.

 

[iwire]

Absolutely. But the key word there is "bonded" - when a home loses its neutral everything around you in the home is bonded, and it all rises to some potential, so there is no difference in potential between objects, so no shock risk inside the home assuming everything really is bonded. Hence the term "equipotential".

We have electric equipment outside at most services, lose the neutral and come between any of those bonded objects and the earth ... your in for a world of hurt.

 

[quogueelectric]

If you rolled this cart into a bedroom would you have to arcfault it??

 

[e57]

IMO the recept's pictured don't even need an EGC - just a full-sized bond on XO to the case. And the item being factory wired, and additionally being temporary wiring much of the NEC would not even apply.

Nice looking cart though - for something that is usually made by the shop apprentice in some spare time, and vary in design - you should feel lucky to have it IMO. I made a few when I was in the military that were just a panel mounted on the same shipping pallet that the transformer came on.