Connect the input and output wires to the corresponding terminals of the distribution box. This step is very crucial and can not bear any faults!Connecting wires to your home distribution box? See how electricians do it professionally! From selecting the right wire gauge to safely connecting the main circuit breaker (MCB), residual current device (RCD), and grounding system, learn how to inspect wiring, properly strip wires, and s. more. A distribution box, also known as an electrical distribution board, is a critical component in electrical systems. Whether in a home or an industrial facility, this box keeps your electrical setup organized, functional, and efficient.