What type of devices and device boxes should I use above class 1 division 2 locations more specifically commercial garages. I have started a new commercial garage with an attached showroom. All of my receptacles are above the required 18" but the code in 511.7 states they need to be totally enclosed. I want to use 1900 boxes with rs covers. Is this ok? Also the owner wants floor boxes and this is not allowed unless rated vapor/explosion proof right?