Electrical Device Boxes
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.
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Enclosure:Back boxes provide a housing for electrical wires, ensuring they are not exposed and can be properly connected.Attachment:
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They allow for the secure mounting of faceplates (switch plates, outlet covers) to the wall.Grounding:
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Some back boxes are designed to facilitate grounding, especially in metallic conduit installations.Gangable:
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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:
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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.