Point taken Curt . . . the information I've been reading (articles online about IG, home improvement books, I even tried to contact a few folks here off the forum to no success) has not ruled out NM for IG. In fact the Black & Decker book shows pictures of IG recptacles with 12/3 NM.

But I think I will defer to the experience of the members of this forum and run 12/2 NM to plastic boxes.

Question:

There is a segment of the run (from the wall to the studio mix desk) that will be on a concrete floor. I was planning on running that through a small piece of conduit and building a threshold to cover it.

What would an electrician do in this case?

Thanks,
Mike