This is my Raspberry PI “Black Box”. It is separated in two with a hinge.
The bottom half houses a Raspberry Pi 3 and a JBtek 4 Channel Relay Module. The top half has 4 separate outlets to power 120 volt devices (10 amps MAX)
Use 6-32 screws for the plugins and the front. use 2.5mm screws to mount the pi and relay
Here's a video in action https://youtu.be/BA-J6zFpl_o