Which type of box can be used to contain a single switch?

A device box is specifically designed to house a single switch or receptacle, making it the appropriate choice in this scenario. The term "device box" refers to any box that securely holds devices such as switches, outlets, or other electrical components in place. It provides the necessary support and wiring space for these devices, ensuring safety and compliance with electrical codes.

Device boxes are generally shallow, allowing for ease of installation and providing enough depth to accommodate the wiring and the device itself. They typically come with knockout holes for cable entries and have features that allow for secure attachment of the device.

While gang boxes, outdoor boxes, and round boxes each serve important functions within electrical installations, they are not tailored to solely accommodate a single switch. Gang boxes are designed to hold multiple devices and may be larger, while outdoor boxes are intended for exterior applications and need to be weatherproof. Round boxes are usually utilized for lighting fixtures or junction points rather than for a single switch installation. Therefore, the device box is the most suitable and efficient option for containing a single switch.