This RV breaker box helped my car stay safe when I switch from onshore power to RV power. To wire a breaker box, I need a 50-amp breaker, a circuit breaker box, and several tools, such as a wire stripper, drill and bits, a screwdriver, and a craft knife. First, I choose where to place the breaker box reasonably. Position the breaker box on the wall and secure it with screws. Loosen the fastener securing the breaker box’s dead-front panel. Remove this section and touch the leads with a voltage meter to confirm there is no current.