Yes the bottom floor is concrete.
Let me make sure I understand your idea. I take off the baseboard on the second floor, cut the sheetrock so I can see the studs, run the wires up to the second floor, notch the studs for the wires then run them back into the bay I need them in? Then replace the baseboards.
I didnt think of that at all. I think I like it though. This could save me alot of work.
On a load bearing exterior wall I THINK i remember that I can notch them up to 1/4" deep. Is that correct?
What are the metal plates you are talking about?