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B&Q£6.73Visit shop B&Q - Metal Back Box Multi Colour (2-Gang 25mm)
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The Dencon 2-Gang 25mm Metal Back Box is a professional-grade electrical component designed for electricians and DIY enthusiasts needing a robust, recessed mounting solution for dual-gang switches or sockets. Its primary benefit is providing a durable, fire-resistant housing that ensures secure installation within walls, though users should note that the 25mm depth is relatively shallow, which may require careful cable management when housing complex wiring or multiple connections.
| Brand | Dencon |
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While it can be used, this box is specifically designed for masonry walls. For plasterboard, dry-lining boxes with 'flipper' clips are typically preferred.
The box typically includes an earth terminal screw, but mounting screws for the faceplate are usually provided with the socket or switch accessory.
This model has a depth of 25mm, which is a standard size for most basic electrical switching and socket requirements.
No, this is a standard metal box intended for indoor dry wall use and is not IP-rated for outdoor environments.
As the box is made of metal, the earth terminal ensures that the box itself is grounded, protecting against electric shock in the event of a fault.
Adjust the mounting lugs to pull the box slightly deeper into the wall cavity or check if debris is trapped behind the faceplate.
Use a flat-head screwdriver to tap out the knockouts cleanly; if edges are sharp, file them down or apply a rubber grommet.
Ensure the earth wire is stripped to the correct length and securely tightened under the earth terminal screw with no stray strands.
To install, mark the wall dimensions based on the box size, chisel out the cavity, and secure the box using appropriate masonry fixings. Ensure the box is recessed slightly below the finished plaster line to allow for a flush faceplate fit.
