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The last remaining domestic circuits without RCD protection.

Sparkingchip
I prepared an EICR this morning for a two bed flat.


The peak installation has a 30 mA RCD main switch, which surprisingly despite being more than ten years old is a type A, so no RCD issues there.


The off-peak supplies two storage heater circuits run in surface mounted plastic mini trunking without RCD protection, so again no RCD issues. If I were installing the storage heaters with new circuits I would install RCD protection, but there’s no reason to condemn an existing installation.


I am just pondering exactly what can be installed in a domestic installation now without any RCD protection with the 18th Edition of the Wiring Regulations making them a requirement on lighting circuits there cannot be much left on the list.


 Andy B.
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    When installing RCD protection to an existing electrical installation the safest option for reducing the risks from electric shock is to install an upfront 30 mA RCD main switch.


    The least safest option is to install a RCD protected switched fused connection unit for a specific item of equipment or a RCD protected socket outlet.


    Because the RCD only provides effective protection downstream of it.


    Also correct earthing and bonding needs to be in place.


    So if the installation was installed to an earlier edition of BS7671 and all the required earthing and bonding is in place, if the addition to an existing circuit is RCD protected from the point the addition is added on then presumably you can claim compliance with BS7671:2018 for the addition in respect of requirements for RCD protection for the new work?
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    When installing RCD protection to an existing electrical installation the safest option for reducing the risks from electric shock is to install an upfront 30 mA RCD main switch.


    The least safest option is to install a RCD protected switched fused connection unit for a specific item of equipment or a RCD protected socket outlet.


    Because the RCD only provides effective protection downstream of it.


    Also correct earthing and bonding needs to be in place.


    So if the installation was installed to an earlier edition of BS7671 and all the required earthing and bonding is in place, if the addition to an existing circuit is RCD protected from the point the addition is added on then presumably you can claim compliance with BS7671:2018 for the addition in respect of requirements for RCD protection for the new work?
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