Once the outlet is tested and confirmed to be working, attach the outlet cover plate. Simply align the cover plate over the outlet and secure it with screws, making sure it is flush with. Learn how to install a distribution box safely and correctly. A distribution box is the heart of any electrical system. It is mainly used to isolate fault circuits, prevent overload, and ensure the safe operation of. A distribution box, also known as a distribution board, electrical panel, or breaker box, is an enclosure that houses electrical components responsible for distributing electricity throughout a building. This guide provides a clear step-by-step approach to help electricians, contractors, and homeowners alike carry out the task confidently.