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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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  • Former Community Member
    0 Former Community Member

    Sparkingchip: 
     

    First off, there has to be accessible tails to insert an upfront RCD, within flats this is rarely possible as they are usually concealed. 

    Secondly, regardless of if you are inserting an upfront RCD into the tails or replacing the fuse board there may well be issues with isolation whilst working. 

    Next there is the lack of segregation of the installation, one small issue takes everything out. 

    Also whilst agreeing an all RCBO consumer unit may be over the top, who is going to sign the disclaimer for omitting a surge protection device?

    Exactly right, tails are away in the riser with all meters tightly fitted to the trunking, so not really an ideal setup for upfront RCD. 

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  • Former Community Member
    0 Former Community Member

    Sparkingchip: 
     

    First off, there has to be accessible tails to insert an upfront RCD, within flats this is rarely possible as they are usually concealed. 

    Secondly, regardless of if you are inserting an upfront RCD into the tails or replacing the fuse board there may well be issues with isolation whilst working. 

    Next there is the lack of segregation of the installation, one small issue takes everything out. 

    Also whilst agreeing an all RCBO consumer unit may be over the top, who is going to sign the disclaimer for omitting a surge protection device?

    Exactly right, tails are away in the riser with all meters tightly fitted to the trunking, so not really an ideal setup for upfront RCD. 

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