Panelboard

An electrical cabinet in which circuit breakers are mounted and connected to wiring. In a residence, the three wires from the service entrance conduit enter the panelboard and are connected to three bus bars in the panel. Two of the leads are hot and one is neutral. The circuit neutral and ground wires are connected to the neutral bus bar in the panelboard. The circuit hot wire is connected to the circuit breaker. Circuit breakers are plugged into the panel and connect to a hot bus bar for 120 volt general service use, and to both hot bus bars for 240 volt service. The 240 volt service is used for items like an oven, heated driveway system using electric radiant heating cables etc.