On 2007-10-28, terry wrote:

Not sure about your jurisdiction but am of opinion that use of the
conduit as the grounding conductor is not now acceptable in most
places in North America.

Conduit as the EGC is recognized by the NEC, and in fact if the
conduit installation is done properly, there are studies suggesting it
is a better conductor than a copper wire EGC. Of course, that's the
rub, each conduit connection has to be made up properly, while a
copper wire EGC is continuous from box to box.

Cheers, Wayne