On Oct 28, 11:42 am, "Charles" wrote:
I'm installing exposed EMT conduit in my garage. The whole system will
be in the conduit, which will be used for the ground. I'm unclear on
whether I'm required to run ground pigtails from outlets and switches
to the back of the boxes. It seems pointless since the ground screw on
the outlet/switch is screwed into the same physical piece of metal that
makes up the mounting flange that screws into the box. I believe I'm
okay to leave it off with the outlets because the packaging they come
in says "grounding", is that right? How about the switches, should they
say "grounding" too (these ones don't)? Thanks for any advice.

--

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. So in addition to the current carrying
conductor live, neutral etc. a grounding wire should also be run and
incidentally 'grounded' to each junction box etc. in approved manner.
Could be an insurance liability issue if something happened, for the
sake of omitting a single conductor! Quite apart from safety, be
careful not to invalidate your insurance.