Has anyone seen or heard of a situation where voltage has induced onto a nail that is driven through a box for means of support? It is allowed as long as the nails are within 1/4" of top/bottom or back of box.
My concern is that we have now introduced a piece of metal that is conductive and could create a hazard. We do this all the time in residential and I've never really thought about it until recently.
I would appreciate anyone's feedback.