On Fri, 03 Aug 2007 16:54:22 GMT, Doug Miller wrote:
In article , Ignoramus2331 wrote:

thinwall, rigid, 12 gauge THHN

Code permits up to 9 (!!) 12AWG THHN conductors in 1/2" thinwall ("electrical
metallic tubing" or EMT), so you're perfectly good with three or four. Even
though Code permits using the conduit as the equipment grounding conductor, I
prefer to pull a separate wire when possible.

Nine would be pretty tough to pull, though. g

And seriously derated in ampacity.

--
Art Greenberg
artg at eclipse dot net