thecampingman wrote:
With a safety ground unavailable you should not bond the cabinet to the neutral. Because if something interrupts the neutral between the sub pannel and the earth ground this would energize the cabinet making "taking a look" a dangerous endeavor.
Most codes would require running a separate wire back to earth ground. Then you have to hope whatever interrupted the earth ground didn't also take out the safety ground. Which would probably be the case.
Ideally you should install an earth ground at the sub pannel And have it Megger tested. Megger equipment
I didn't want to drill a hole in the middle of my garage floor and install 12' of ground rod so my sub pannel box is not grounded.
My other sub pannel for my camper is grounded to an earth ground at the box.
thanks.. the building panel (sub) cabient is earth grounded with a lead to the ground rod, and the metal building is also tied to the cabinet with a separate lead.
(same for the other metal building).
