What is the function of a panelboard?

The function of a panelboard primarily revolves around the distribution of electrical power to multiple branch circuits and providing overcurrent protection for those circuits. A panelboard aggregates the electrical supply from the main service and distributes it through individual circuit breakers or fuses that connect to various appliances or systems within a building.

This setup ensures that each branch circuit can operate independently while also being protected from overloads or faults. If a current exceeds the rated capacity of a circuit, the circuit breaker interrupts the flow of electricity, preventing damage to the wiring and reducing the risk of fire hazards. Hence, the essential role of a panelboard is to ensure both the proper distribution of electrical energy and the safety of the electrical system within a structure.

Other options describe functions not specific to a panelboard. The conversion of AC to DC is typically performed by a rectifier or power supply, not a panelboard. While a main electrical service point does cover aspects of power distribution, it generally refers to larger systems, while the panelboard specifically focuses on sub-distribution. Surge protection is another vital aspect of electrical safety, but it is typically handled by dedicated surge protection devices, rather than the panelboard itself.