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Regulation for rewring back box?

Former Community Member
Former Community Member

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

    Cutting off earths is not good practice, but sadly far from unknown at the shallow end of the profession…

    The small wagos are very good if you get the right ones. the lever ones are best for folk who may change their minds.

    Personally I like the wago 221s,  and have a couple that I keep for testing as well.

    I think  a 45mm box is the deepest you will commonly find..

    Mike.

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  • 0

    Cutting off earths is not good practice, but sadly far from unknown at the shallow end of the profession…

    The small wagos are very good if you get the right ones. the lever ones are best for folk who may change their minds.

    Personally I like the wago 221s,  and have a couple that I keep for testing as well.

    I think  a 45mm box is the deepest you will commonly find..

    Mike.

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