I'm in the process of adding a floor to our basement, using the Building Science recommendations (1" of foam insulation covered by 2 layers of 15/32" plywood, covered by some sort of playroom flooring. I'd like to at least have the option of running power to the center of the room in the future, so I was thinking of running some ENT under the plywood, but not actually wiring anything. However, I'm not sure what sort of receptacle would be appropriate, eventually, and if I should put a box in place for the future.
I can find two types of boxes that are rated for floors, and neither seem appropriate in this case. One type is specifically for installing into wood floors, assuming you have access to the floor from below, and the other type assumes that you're pouring concrete and will be pouring the box around the concrete. Both are far deeper than I'd be able to fit anyway without chiseling out some concrete, and even then the openings for conduit are placed in such a way hat I'd have to chisel out even more concrete.
Am I missing something here, or is adding a floor receptacle to an already existing foundation not realistic?