My main electrical circuit breaker panel is on one end of our unfinished basement. I need to run 2 circuits to the far end of the basement. Normally I would mount these wires on the center beam that supports the home and runs down the center of the house. Since there is no more space left on that center beam, I would like to route #12 type NM wire through my basement ceiling by drilling suitable holes in the floor joists.
Is this legal and can I put 2 wires in one set of holes?