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RCD Protection For Old Installations

Former Community Member
Former Community Member

Hey there, 

Would like to hear your thoughts on the case. 

If the installation from the 70s or 80s with old mem board has no rcd protection for neither sockets nor lights (with metal front plate switches, which are connected to CPC), taking into consideration that the installation was working cheerfully since the old days till today and all Zs values are within the range of the installed breakers and overall good condition. Would this require an upgrade to rcd protection as of the 18th edition or would class as C3 as of best practice guide 4 suggest on eicr? 

How would you approach the situation?

Regards, 

Karolis

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    If the landlord is prepared to pay for you to fit a new CU and correct all discrepancies from BS7671 blue copy, then fine, but many may not. Then you can issue a new EIC, but surprisingly few actually do this correctly. There are NO C3 or whatever on a new EIC. You will note that the definition of installation is the whole system, writing “New CU” is in my view totally unsatisfactory. 

    Eh? Surely it's perfectly correct to issue an EIC for just a CU replacement (or any other work beyond simple changes to existing circuits, where a minor works cert may be used) - what other BS 7671 cerification option is there? Nothing really suggests that an EIC always covers an entire installation - the presence of the ‘Extent of installation covered by this certificate’ makes it pretty obvious.  Of course there will be no C3s on the new EIC - the entire concept of reporting codes only applies to reports, not certificates. But it should be pretty obvious given an EICR with codes all over the installation and a new EIC for the replacement CU only that some codes may remain.

    Likewise an EIC cannot cover existing part of an installation in addition to the new work - we can only issue certificates for work we've done. Anything else can only be a report. Unless the only option is a complete replacement of the entire installation every time … but I'm sure you weren't suggesting that.

       - Andy.

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  • 0

    If the landlord is prepared to pay for you to fit a new CU and correct all discrepancies from BS7671 blue copy, then fine, but many may not. Then you can issue a new EIC, but surprisingly few actually do this correctly. There are NO C3 or whatever on a new EIC. You will note that the definition of installation is the whole system, writing “New CU” is in my view totally unsatisfactory. 

    Eh? Surely it's perfectly correct to issue an EIC for just a CU replacement (or any other work beyond simple changes to existing circuits, where a minor works cert may be used) - what other BS 7671 cerification option is there? Nothing really suggests that an EIC always covers an entire installation - the presence of the ‘Extent of installation covered by this certificate’ makes it pretty obvious.  Of course there will be no C3s on the new EIC - the entire concept of reporting codes only applies to reports, not certificates. But it should be pretty obvious given an EICR with codes all over the installation and a new EIC for the replacement CU only that some codes may remain.

    Likewise an EIC cannot cover existing part of an installation in addition to the new work - we can only issue certificates for work we've done. Anything else can only be a report. Unless the only option is a complete replacement of the entire installation every time … but I'm sure you weren't suggesting that.

       - Andy.

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