Electrical Device Boxes

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Electrical wiring device back boxes, also known as device boxes or backboxes, are enclosures that hold the ends of electrical wires for switches, outlets, and other wiring devices. They provide a safe place for wiring to be connected and also serve as an attachment point for faceplates. These boxes are crucial for ensuring a secure and code-compliant electrical installation.

Key Features and Types:

Enclosure:

Back boxes provide a housing for electrical wires, ensuring they are not exposed and can be properly connected.

Attachment:
They allow for the secure mounting of faceplates (switch plates, outlet covers) to the wall.

Grounding:
Some back boxes are designed to facilitate grounding, especially in metallic conduit installations.

Gangable:
Device boxes can be configured to accommodate multiple wiring devices (switches, outlets) in a single box, often referred to as gangable.

New Work vs. Old Work:
New work boxes are used in new construction, while old work (or remodeling) boxes are used in existing buildings where drywall is already installed.

Types of Back Boxes:

Single Gang: Designed for one wiring device.
Double Gang: Holds two devices.
Round Back Boxes: Used for specific applications.
Handy Boxes: Mounted on the surface of a wall.
Junction Boxes: Enclosures for connecting wires to each other, not to devices.
Metallic and Non-Metallic: Available in various materials, including metal and plastic.