What is a panelboard?

A panelboard is best defined as an assembly of devices for controlling and distributing electrical power. It serves as a central point in an electrical system where power is received from the main supply and then distributed to various circuits within a building or a vessel. This system provides protection, control, and distribution of electrical energy, often incorporating circuit breakers or fuses to safeguard individual circuits against overcurrent.

Panelboards are essential for organizing electrical distribution, allowing for efficient management of electricity while also ensuring safety through overcurrent protection. They are typically mounted in easily accessible locations and may also include features like busbars and terminal blocks for connection to various circuits.

The other choices do not accurately represent the function of a panelboard. A display for safety instructions, a storage enclosure for tools, and a decorative panel would not fulfill the role of managing and distributing electrical power, which is the primary function of a panelboard.