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Regulation for rewring back box?

Former Community Member over 3 years ago

Hi, I'm currently holding an MEng in EEE, but not a certified electrician otherwise.

I want to install smart light switches in my “dwelling”. I have encountered issues where the current back box is standard 74x74x25, but I would need extend it to 86x86x38 for the new light switch.

I want check do I need part P certificate, or planning permission? How to be compliant while minimise the cost? (I have no experience in dwelling electrical work)

PS: The dwelling is a new build (2019)
PPS: I might consider obtain required certificate(s) myself if is not too expensive. Since I like do these kind of work, so it might be cost effective in the long term.

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0 Chris Pearson over 3 years ago

This is getting very complicated for a simple question!
As BOD said at the start, the pattress box shown is a surface mounted one. Alternatives are galvanised steel ones, which are set into the wall, and plastic ones for stud walls, which sit just proud of the plasterboard, which not only holds them in place, but also disappears if the wall is skimmed.
The spacing for the screws (M3.5) is the same for all of them.
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0 Chris Pearson over 3 years ago

This is getting very complicated for a simple question!
As BOD said at the start, the pattress box shown is a surface mounted one. Alternatives are galvanised steel ones, which are set into the wall, and plastic ones for stud walls, which sit just proud of the plasterboard, which not only holds them in place, but also disappears if the wall is skimmed.
The spacing for the screws (M3.5) is the same for all of them.
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Regulation for rewring back box?

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