What is the primary function of a panelboard?

The primary function of a panelboard is to distribute power and control circuits. A panelboard, also known as a distribution board or breaker panel, serves as a centralized location where electrical power is distributed to various circuits throughout a building or facility. It houses circuit breakers or fuses that protect these circuits from overloads and faults, ensuring the safe management of electrical distribution.

In addition to distributing power, panelboards are integral in controlling the electrical circuits connected to them. They allow for the easy addition, removal, or adjustment of circuits as needs change, making them a flexible solution for managing electrical systems. This capability ensures that different areas or equipment can operate safely and efficiently without overloading the supply lines or creating circuit failures.

The other choices highlight aspects of electrical systems but do not encompass the primary role of a panelboard. While isolating circuits is a function of circuit breakers within the panelboard, the main purpose is broader and includes distribution. Converting AC to DC power is typically done by rectifiers, not panelboards. Measuring electrical consumption is performed by energy meters, which may be connected to or alongside a panelboard, but this is not a core function of the panelboard itself. Thus, the emphasis is rightly placed on the distribution and control of