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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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    May I suggest that you read BS7671 411.3.4 that states that all circuits supplying luminares will be protected by 30mA RCDs.

    As BS7671 is an aid to design and not a statutory instrument it maybe argued that lighting circuits already in exsistance were exempt and that work carried out on exsisting circuits might also be exempt. Now that would probably depend on the amount and type of work to be employed on those circuits.

    Change of a lamp or fitting that conformed to its present class might not require additional RCD protection but adding new cabling that in effect changes its circuit design may well reuire updating.


    Legh
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  • 0
    May I suggest that you read BS7671 411.3.4 that states that all circuits supplying luminares will be protected by 30mA RCDs.

    As BS7671 is an aid to design and not a statutory instrument it maybe argued that lighting circuits already in exsistance were exempt and that work carried out on exsisting circuits might also be exempt. Now that would probably depend on the amount and type of work to be employed on those circuits.

    Change of a lamp or fitting that conformed to its present class might not require additional RCD protection but adding new cabling that in effect changes its circuit design may well reuire updating.


    Legh
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