What are junction boxes primarily used for in electrical connections?

Junction boxes are primarily used in electrical connections to house and protect the wiring and connections made within them. They serve as a secure enclosure where multiple electrical conductors can be joined together, allowing for the organization and management of electrical circuits. Junction boxes provide a means to safely route wires and reduce the risk of electrical shorts or exposure, as they are designed to contain any heat or sparks from the connections.

The purpose of these boxes extends to offering accessibility for inspection, maintenance, and future adjustments of the electrical system without compromising safety. They are specifically designed to meet electrical codes, ensuring that connections are secure and adhere to safety regulations.

In contrast, the other options focus on different components or systems within electrical work that do not serve the same context or function as junction boxes, making this the precise answer to the query regarding their primary use.