Electrical Box (American outlets)

This is just a box & cover for the electrical box (American 120VAC outlets), it is a customizer version so you can alter the dimensions to fit your needs.
The outlet socket holes dimensions were taken from Wally thingi https://www.thingiverse.com/thing:47956 thanks to Chris (TheNewHobbyist)

Finally, if you program in OpenSCAD then you might find the following information useful:
1. Line 50 - radius of the half circle was hard coded to 7mm, next line its value depends on the size of the screw hole_radius (default to 3mm), which is the same. You can set this radius to any value at line 50 and comment out line 51.
2. Parameter screw_pos is default to 3mm from the edge for both module box and module cover. You can change these values to fit your unit.