On 2006-07-14, RBM wrote:

If you have metallic cables or conduits, their connection to the chassis is
their path to ground

Hmm, good point--it is permissible to use some conduit systems as the
EGC in the branch circuits, so then subpanel chassis is part of the
fault current path for those circuits. However, while this may meet
the NEC, I would not consider this to be the best practice. So
perhaps that is the answer to my original question.

Cheers, Wayne