A gang box, also known as an electrical box or junction box, is a type of enclosure used to house electrical connections, switches, outlets, or other electrical devices. It is typically made of metal or plastic and is installed within walls, ceilings, or floors during construction or renovation projects.

The term "gang" refers to the number of openings or compartments in the box. A single-gang box has one opening, while a double-gang box has two openings, and so on. Gang boxes come in various sizes and configurations to accommodate different types of electrical installations.

Gang boxes serve several purposes:

Protection: They protect electrical connections and wiring from damage, moisture, dust, and other environmental factors that could pose a risk of electrical hazards.

Containment: Gang boxes contain electrical splices and connections, preventing them from being exposed and reducing the risk of accidental contact or damage.

Organization: They help to organize electrical wiring and components, making it easier to locate and access connections when needed.