Hello,

I'd like to add some receptacles in my unfinished basement for using
the space as a workshop, and my understanding is that I need to use
conduit. I'm comfortable wiring circuits using NMB cable, but this
will be my first time using conduit, so I have several questions.

1) My default idea is to use EMT, but there seems to be a confusing
number of different types of raceways. Can anyone point me to a
good overview of them?

2) My understanding is that is acceptable to use EMT as the equipment
ground, but is it still a good idea to run a separate EGC? If I do
so, I assume that I should bond every box to the EGC. Does it
matter if the EGC is bare or green?

3) The wall is concrete for the first 4' and then a wood stud cripple
wall covered in 1/2" sheer paneling. I don't have any experience
fastening to concrete, what is the best way to go? It would be
easier to attach to the sheer paneling, but I expect 4.5' is too
high to be convenient for receptacles.

4) I'd like to run two 120V circuits. What are the pros and cons of
having them share a neutral versus having separate neutrals? One
appealing option is to use two duplex receptacles in each box, each
fed from a different leg. I believe this requires a double pole
breaker?

Thanks, Wayne