Originally Posted by kaadaq
What I'm envisioning is an empty gang box mounted directly above a live, wall-plated box, with smurf tube running between the two. The theory is, if I ever decided to put a TV on the wall there, we uncover the box by cutting the drywall, and either relocate the lower outlet, or run a wire in the conduit to add an extra outlet. Likewise for low voltage. I've even considered burying an empty double-gang box with a divider to separate low voltage and line voltage, and running two smurf tubes to it. My question is: has anyone done this?
I've done "similar". In areas I knew there would be a TV, obviously pre-wired with a TV Box (recommend the 3 or 4-gang Arlington TV Box). For a few areas that I didn't know if I'd ever use, and would have been odd for a blank plate - like high on the wall in the master bathroom - I buried the low-volt lines behind the drywall, and made sure this was in the same stud bay as an outlet. I pre-drilled a hole through the blocking so a wire could be fished down (and left a pull string). In hindsight that wouldn't be a big deal, as once you cut a 2-4 gang opening, it's easy to get a flex drill bit into the cavity.
Does this satisfy code, as long as the box stays empty until it is uncovered? Am I crazy to worry about this? Should I just put the blocking in and then install boxes if and when I need them? I'm just trying to minimize the amount of effort/destruction this expansion could cause.
Burying a box will probably raise questions with the inspector(s), and you might find that your drywall guys "fix" it for you and expose the box.
Just bury the wires, make sure you have an easy path to power within the same stud bay, and then document the whole thing with photographs and measurements.
Last question -- if this is all ok to do, does anyone know of a recessed media box that also accepts smurf tube? The ones I've seen at Monoprice, or even the Arlington ones on Amazon, don't look like that would connect well...
Well, you should be able to attach a small smurf tube with male connectors glued on into the "power" side, but that won't really help you much. I suppose you could attach conduit to the nearby electrical box, leave it empty, and let it terminate below the planned TV location, but that seems like it's just as likely to get in the way as help...