Learn the step-by-step process of customizing complete distribution boxes tailored to your needs. This project involves combining an enclosure, protective devices, and various receptacles into a single, portable, or semi-permanent unit. Building your own distribution box allows. Building an electric distribution box can be a useful and rewarding DIY project for those who are familiar with electrical wiring and safety procedures. An electric distribution box, also known as an electrical panel or circuit breaker panel, is the main hub for electrical circuits in a home or. This step is pretty important, especially when you are trying to squeeze all this stuff into a small space. Basically just take all of your boards and terminal strips and such and tape or set them in place to figure where they fit. Once you decide on your layout start screwing your parts down to. A while back, I needed to install a new electrical distribution box in my personal workspace. While this is a job best left to certified professionals, my pride as a self-proclaimed “clumsy technician” wouldn't let me call for help. So, I decided to build one myself. The circuit layout is as shown below.