I want to install electrical outlets in my unfinished basement that has block walls.
It is my understanding you can't have cable on the walls–that whatever cable used must be protected by conduit.
My idea is use NM-B cable from the breaker box, run cable through joists down 3/4" conduit to box with GFCI outlet. Then run the 12/2 cable back up the same conduit and thru joists until it goes down conduit on wall again to an outlet and so on.
Is there any issue with taking cable down and back up the same conduit due to heat?
Trying to do this with the least conduit installed as possible but safely.