What is the purpose of a junction box?

A junction box serves the essential purpose of housing and protecting electrical connections. It provides a safe enclosure for wire splices and junctions, ensuring that these connections are safeguarded from external elements, such as moisture and physical damage. This protection helps to maintain the integrity of the electrical connections, reducing the risk of electrical shorts, fire hazards, or system failures.

Furthermore, junction boxes facilitate easier access for inspection and maintenance, allowing electricians to make necessary repairs or modifications without extensive work on the wiring system. They are particularly important in both residential and commercial electrical installations, where organized and safe connections are crucial for overall system reliability.

In contrast, options that suggest functions such as converting AC to DC, measuring electrical flow, or storing backup power do not align with the primary role of a junction box. Each of those functions pertains to different types of electrical equipment or components that serve specific operational purposes outside of the protective and organizational role of junction boxes.