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Requirements for RCD protection on a 32a Socket supplying Mobile Equipment

Liam Puffitt

I have been presented an EICR with a code 2 referencing Regulation 411.3.3, no 30mA RCD protection for socket outlets under 32amp. The 32a socket has a 100mA Time Delay RCD fitted, as it's being used to supply a local DB within a cabin. My initial thoughts were this was satisfactory and shouldn't have been coded a C2 due to the requirement for discrimination between the RCD's to avoid nuisance tripping, now I am not so sure. 

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  • 0
    Liam Puffitt said:
    The 32a socket has a 100mA Time Delay RCD fitted

    Does this mean that the RCD is integral to the socket?

    C2 seems a bit harsh - additional protection was only required for socket-outlets not exceeding 20 A in 17th Edn.

    Is there any realistic possibility that this socket could be used for any other purpose?

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  • 0
    Liam Puffitt said:
    The 32a socket has a 100mA Time Delay RCD fitted

    Does this mean that the RCD is integral to the socket?

    C2 seems a bit harsh - additional protection was only required for socket-outlets not exceeding 20 A in 17th Edn.

    Is there any realistic possibility that this socket could be used for any other purpose?

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  • 0 in reply to Chris Pearson

    Integral to the socket yes, 100mA RCD protection on the 32a Socket. Sockets have been installed to supply a Portacabin, although it could be considered mobile it is a permanent site office for a contractor within our site. It won't be used for an other purpose. 

  • 0 in reply to Liam Puffitt

    Thank you. Back to 411.3.3: (i) from the sound of it, nobody will be using the socket, i.e.plugging anything in; (ii) a documented risk assessment might exempt the socket - some form of warning notice might help; (iii) does not apply.

    I would not give more than C3.

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