A technical diagram of the electric well, detailing the layout and connection of electrical equipment (e., distribution boxes, cables, meters), wiring routes, safety protection devices, and maintenance access to ensure orderly installation. An electrical panel box, also known as a breaker box or a distribution board, is a crucial component of any electrical system. Distribution Board or DB is an electricity supply system or a common enclosure that distributes the electrical power feed into subcircuits. It includes isolator, RCCB (Residual current circuit breaker) or RCD (Residual-current device) devices, protective fuses or MCB's (Miniature Circuit Breaker). What Is Common Grounding?Common grounding refers to the practice where a system's functional (working) grounding, equipment protective grounding, and lightning protection grounding share a single grounding electrode system. more Welcome to our comprehensive animated guide on home. Single Phase Distribution Box Wiring Diagram for Beginner (DB Wiring) What is Distribution Board? Distribution board is a safe system designed for house or building that included protective devices, isolator switches, circuit breaker and fuses to safely connect the cables and wires to the sub.