Distribution Box acts as both the load center and the power distributor. A distribution box often referred to as a distribution board, panel board, breaker panel, or electric panel, guarantees that the electrical supply is distributed throughout the building. It is the main electrical supply system for any structure or piece of land. A primary switch is typically also included in Distribution Box, and more recently, one or more residual-current devices (RCDs) or residual current breakers with overcurrent protection (RCBOs).