Continuing my basement shop brainstorming...
As I said in another question, the good news is that I've got a 30-amp 240V circuit more or less in the right place and available, and easily accessible for its entire length.
The questionable news is that it's a 3-wire circuit -- no safety ground. It's in conduit, but I never like trusting the continuity thereof.
So: How insane would it be to run a new safety ground outside the existing conduit?
... Or should I just scrap the old run and redo it as NMC/Romex?
... Or should I put a GFCI in the new secondary box on principle (probably!), in which case safety ground is mostly moot? I've used that solution for several outlets that had the same problem..