well i have done residential,,, commercial ,, and industrial,, but as we all know there is still more to see and learn all the time,,, and yes i have never wired an RV,,,, using a shallow box will not work with this device and 2 --12-2 wires in it ,,, i think i will move on to that device that they talked about that plugs into the recep that has the ports on it ,,, the outer wall is to shallow to put a full size box in there ,,, so thanks for all the responces ,,,, done as of now ,,,,