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Notifiable or not

vantech

Hi,

Seeking some clarification on Part P. 

Existing 6mm cable protected by a 25A RCBO in main CU. Is an upgrade to a 40A RCBO, notifiable under Part P? It isn’t a new circuit, only a modification which after modification, complies with BS7671. Thoughts? 

The current 6mm cable is sized down to a 4mm cable in a junction box and then goes off to feed 2 socket radials.

Would adding 2x OCPD (for example 16A MCBs) at this junction point, be seen as a “new circuit” or would this also be a modification? At present, these OCPD don’t exist, so would need adding from a new DB. 

I am no longer Part P registered to self notify, and albeit I want to do this myself, I also want to do it properly so if I need to outsource any of this I can (but would much rather not!). 

Thanks. 

Parents
  • 0

    Just do it - you are competent to do so.

    I am at a loss to understand why changing a 25 A MCB for a 40 A one would be any different from replacing it with another 25 A one.

    Strictly speaking, putting in a new DB downstream (or anywhere else) would be notifiable.

    Why do you need to upgrade and would 32 A do?

    As for reasons for not notifying: my local authority's charges are not available right now, but there would be several hundred reasons for not notifying? ;-)

    One other option might be to get an old mate who is still registered to sign it off.

Reply
  • 0

    Just do it - you are competent to do so.

    I am at a loss to understand why changing a 25 A MCB for a 40 A one would be any different from replacing it with another 25 A one.

    Strictly speaking, putting in a new DB downstream (or anywhere else) would be notifiable.

    Why do you need to upgrade and would 32 A do?

    As for reasons for not notifying: my local authority's charges are not available right now, but there would be several hundred reasons for not notifying? ;-)

    One other option might be to get an old mate who is still registered to sign it off.

Children
  • 0 in reply to Chris Pearson

    Yeah I am of the same opinion to be honest! 

    The 6mm SWA will land into a new DB protected by a new 40A MCB.

    There are currently 2 socket radials wired in 4mm SWA. The first radial will remain as a socket circuit on a new 16A RCBO. The second radial will change into a supply for a hot tub, on a 32A RCBO (no sockets on this, just the tub). 

    Wiring is pre-existing so want to reuse rather than re-pull! 

  • 0 in reply to vantech

    I have seen a related trick used as a part P notification avoidance tactic. When the new DB is fitted, there are breakers that do nothing other than supply a short stub of cable, in effect nothing at all, rather than  truly blank ways.

    Why ?

    Because whatever happens next is just an extension/ modification and not new.  Certainly a replacement breaker is not a new circuit. Adding a new board downstream sort of is, but honestly I'd really not lose a lot of sleep over it - who is it for? - unless it is the sort of situation where someone is likely to report it, I think there is very little to worry about.

    A proper job done well but not notified is a lot less concern than a job done badly, or some weird non-notifiable bodge, notified or not.

    Mike

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