I have some plaster walls in my house and I am attempting to add an outlet to one of the rooms. Basically I plan to fish some romex from the attic into one of the rooms (behind a plaster wall) and add a box / outlet from there. My only concern is making sure that the job is up to code. Do I have to staple the romex to the studs behind the wall, etc. or is it OK to just let it hang down.
Obviously I want to avoid having to knock holes in the wall, but overall safety is my primary concern so I'd be happy to do it if it means not burning down my house because i was being lazy.