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RCD Protection to existing lighting circuits vs 18th edition

adi_mrok
Good day all,

I have a client who wishes to replace lighting within the building and the simple question I have is do I have to allow for RCD protection for altered circuits as per 18th edition or can I omit the RCD as we can treat it as retrofit? We have an old type of the fuseboard so I would need to allow for separate enclosure fitted with RCDs. Cheers everyone!


adriano30
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    411.3.4 that states that all circuits supplying luminares will be protected by 30mA RCDs.



    But only for in domestic (household) premises. If it's anything else (commercial etc) then there's no change from the 17th.


    I'd suggest that any new work covered by BS 7671 should be done under the current regulations - e.g. adding new lights using extra cabling etc - then at least the new work should have 30mA RCD protection (if domestic). Simply replacing a light fitting with a new one like-for-like without altering the existing cabling I'd suggest wouldn't require any of the existing circuit to be upgraded (but a note under the comments on the existing installation on the certificate, if you elect to issue one, would be reasonable). In any event it's worth offering the customer the option to upgrade to latest standards, if it can be done relatively easily.


      - Andy.
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  • 0

    411.3.4 that states that all circuits supplying luminares will be protected by 30mA RCDs.



    But only for in domestic (household) premises. If it's anything else (commercial etc) then there's no change from the 17th.


    I'd suggest that any new work covered by BS 7671 should be done under the current regulations - e.g. adding new lights using extra cabling etc - then at least the new work should have 30mA RCD protection (if domestic). Simply replacing a light fitting with a new one like-for-like without altering the existing cabling I'd suggest wouldn't require any of the existing circuit to be upgraded (but a note under the comments on the existing installation on the certificate, if you elect to issue one, would be reasonable). In any event it's worth offering the customer the option to upgrade to latest standards, if it can be done relatively easily.


      - Andy.
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