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Need for Additional protection for circuits serving zones 1 and 2 in a bathroom

Former Community Member
Former Community Member
I am looking at a like for like replacement of a shower and trying to avoid the cost of replacing the CU if possible as the property is likely to be completely gutted in the next 12 months and fitting a new CU before this is difficult to justify.

I am confused because the regs seem to contradict themselves.


701.411.3.3 states Additional protection shall be provided for all low voltage circuits of the locations including circuits that pass through zones 1 and or 2.... by the use of one or more RCD's.


Then 701.415.2 States that supplementary bonding is required unless main bonding is in place and all circuits are protected by a 30mA RCD.


To me 701.411.3.3 seems to state an RCD is always required but 701.415.2 implies that if supplementary bonding is in place then an RCD is not essential.


I would be interested in your views.


Thanks


Alan
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    AJJewsbury:

    Arguably if it's an existing circuit and you're simply replacing the appliance like-for-like, there's no requirement to bring the existing circuit up-to-date. Most would probably recommend taking the opportunity to do so - and the manufacturer's instructions for the new unit would most likely ask for 30mA RCD protection - but there might be a modicum of wiggle room there.


    Is this DIY or paid work?


    If DIY, there is no obligation to comply with BS 7671, nor is a like-for-like replacement notifiable.


    If paid work, the circuit really ought to be compliant and, of course, a MEIWC will be issued.


    Nothing has been said whether the premises are owner-occupied, vacant, or let.


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  • 0
    AJJewsbury:

    Arguably if it's an existing circuit and you're simply replacing the appliance like-for-like, there's no requirement to bring the existing circuit up-to-date. Most would probably recommend taking the opportunity to do so - and the manufacturer's instructions for the new unit would most likely ask for 30mA RCD protection - but there might be a modicum of wiggle room there.


    Is this DIY or paid work?


    If DIY, there is no obligation to comply with BS 7671, nor is a like-for-like replacement notifiable.


    If paid work, the circuit really ought to be compliant and, of course, a MEIWC will be issued.


    Nothing has been said whether the premises are owner-occupied, vacant, or let.


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