Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:2826332.
Use at your own risk. I am not responsible for how you use this model. This is my own creation since I did not like what was at the store. And frankly 3d printing is often more convenient than a trip to the store....cheaper too. If you use this and it catches fire, explodes, melts, gives you chronic diarrhea, etc.... I am not responsible.
Can be used to mount US electrical devices such as a switch or outlet. The outer dimensions should match that of the faceplate making it slightly more aestheticly pleasing.
5.1.19 added outletbox4 used in the image as a convenient solar panel disconnect. It has not given me any problems so far and has been quite nice to have. I drilled a side hole for my safety fuse but a simple boolean operation can save you the plastic and drill time.