MK Electric Steel Back Box - 3 Gang - 35mm - K863
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Product Information
Full details
The MK Electric Steel Back Box (K863) is an essential component for electricians and DIY enthusiasts looking to create secure, flush-mounted electrical terminations. Designed for 3-gang configurations, this heavy-duty steel enclosure provides the structural integrity and space necessary for managing complex wiring, though users should ensure their wall cavity depth can accommodate the 35mm profile before installation.
All features
| Model Part Number | K863 |
|---|---|
| Brand | MK Electric |
Extended Product Information
FAQs
Is this back box suitable for mounting in stud walls?
Yes, but it is primarily designed for flush mounting in masonry or solid wall structures. For stud walls, ensure you have proper bracing.
Can I use this for outdoor installations?
No, this steel back box is intended for indoor use. Exposure to moisture will lead to rust and potential electrical hazards.
Does it come with mounting screws?
The box usually includes fixing lugs for accessories, but wall mounting screws for the box itself are typically sourced separately depending on the wall material.
What is the primary benefit of the 35mm depth?
The 35mm depth allows for easier wiring of complex switch assemblies or socket circuits that require more space for cable tails.
Are the mounting holes compatible with all 3-gang plates?
Yes, the K863 adheres to standard UK mounting dimensions for 3-gang electrical accessories.
Troubleshooting
Faceplate is not sitting flush against the wall
Ensure the back box is installed deep enough into the wall cavity and that no plaster debris is obstructing the screw holes.
Knockouts are difficult to remove
Use a flat-head screwdriver and a light tap with a hammer to carefully pry the edge of the knockout until it snaps away.
Pros and Cons
Pros
- Robust steel construction provides excellent protection
- Ample 35mm depth accommodates deeper wiring accessories
- Standardized 3-gang sizing fits common industry faceplates
- Secure flush-mount installation creates a professional look
Cons
- Requires significant wall cavity depth to install
- Steel requires careful grounding if necessary for specific local codes
- Limited flexibility once fixed into masonry or stud walls
Setup, Compatibility & Care
To install the MK Electric Steel Back Box, ensure you have correctly measured your wall cavity to account for the 35mm depth. For masonry walls, carve out a space slightly larger than the box, level it, and secure it using appropriate mortar or mounting screws. When routing cables, use the provided knockouts; ensure you use proper cable glands to protect wires from sharp metal edges. Maintain the product by occasionally checking that all screw terminals on your faceplates remain tight, as vibration over time can sometimes loosen connections.