What is a busbar used for in electrical systems?

A busbar is a conductive material, typically made of copper or aluminum, used primarily to distribute electrical power to multiple circuits within an electrical system. It serves as a central point where electrical connections are made, allowing for efficient distribution of power from sources like transformers or generators to various outgoing circuits.

The design of a busbar enables the handling of high currents with minimal resistance, which makes it effective for managing power distribution in commercial and industrial settings. By using a busbar, the electrical system can maintain a cleaner setup with fewer wires, making troubleshooting and modifications easier. This functionality is key in panelboards, switchboards, and substations, where several circuits need to draw power from a single source.

While the other options might pertain to various aspects of electrical systems, they do not correctly define the primary function of a busbar. For instance, busbars do not store energy for later use, nor are they primarily used for safely conducting maintenance or measuring current. Their core purpose revolves around the distribution of electrical power, which is why option B is the correct choice.