The answer to 'how does junction box work' is a junction box is an electrical box that houses wire connections and provides a safe, accessible location for them. Junction boxes are used throughout a home's electrical system to connect and route wiring, including for outlets, light fixtures, and other electrical devices. They have a removable cover that allows access to the internal connections, making it easy to add, remove, or modify wiring as needed.
Junction boxes are typically made of metal or plastic and are installed in the walls, ceilings, or floors of a home. They provide a protective enclosure for the wire splices and connections, keeping them safe from damage and preventing potential electrical hazards. Junction boxes come in a variety of sizes to accommodate different numbers and types of wires, and they can be used for both new construction and remodeling projects.