The most-filled run will have three 20A 120V circuits for outlets wired with #12, and 2 30A circuits for 240V wired with #10. (One 240V for the dust collector, and one for everything else.)
I'm currently planning to run a single #10 ground wire (bare or green) to ground everything on this run. I think this meets code, but I'd like confirmation. (I'm in Canada so it's CEC rather than NEC, but I wanted to get a general idea if I'm in the ballpark.)
Assuming the above is okay, I'll have 11 wires in that conduit. Given that I'm allowed 11 #10 wires in a 3/4" conduit, does that sound like a reasonable conduit fill? Max spacing between conduit openings will be about 10 ft.
Since this is a one-man shop I'll only ever be using two tools at once, maybe three if someone is helping. I'm working on the assumption that my load diversity is enough that I can use the 70% ampacity derate for 10 conductors in a conduit. Is this reasonable, or do I have to go down to the 50% derate? Should I go with two 1/2" conduits instead of a single 3/4"?
Finally, what's the best way to pull this given that the various wires are going to different places, and one of the 240V circuits is going right to the end? Do I pull one section at a time with all the wires for that section?