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How to wire up a consumer unit

Arran Cameron

A semi-detached house has a prehistoric fuse box with rewirable ceramic fuses. It will shortly be replaced with a modern consumer unit. The existing circuits are:



 



1. Lights



2. Upstairs sockets



3. Downstairs sockets



4. Kitchen sockets



5. Cooker



6. Shower



 



The following circuits will be added to the consumer unit:



 



7. Central heating



8. Burglar alarm and CCTV



9. Outside lights



 



I have been informed that the best choice is a split load consumer unit with two RCDs and space for RCBOs. My intention is that circuit 8 has its own RCBO but what is the optimal way to allocate circuits to RCD A and RCD B? Also, should any other circuits have their own RCBO?


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    Alasdair Anderson:



    Remember that the Wiring Regulations are a British Standard (BS7671) and the IET are selling it under licence from BSI. If they were to provide it for free it would be breach of copyright. I don't know of any National or International Standards (e.g. BS, DIN, NEN, IEC, etc.) that are provided free.

    Alasdair


    It disgusts me how many botched, and potentially dangerous, electrical installations are out there carried out by DIYers and cowboy sparkies who do work for friends and family. Even professional qualified electricians are not always on the ball or up to date with their knowledge, especially when faced with new or unconventional situations. If professional and legal requirements for electrical installations were more easily available for a lower price then it would go a long way towards ensuring that electrical installations are safer and up to date with industry practices. 

     

Reply
  • 0

    Alasdair Anderson:



    Remember that the Wiring Regulations are a British Standard (BS7671) and the IET are selling it under licence from BSI. If they were to provide it for free it would be breach of copyright. I don't know of any National or International Standards (e.g. BS, DIN, NEN, IEC, etc.) that are provided free.

    Alasdair


    It disgusts me how many botched, and potentially dangerous, electrical installations are out there carried out by DIYers and cowboy sparkies who do work for friends and family. Even professional qualified electricians are not always on the ball or up to date with their knowledge, especially when faced with new or unconventional situations. If professional and legal requirements for electrical installations were more easily available for a lower price then it would go a long way towards ensuring that electrical installations are safer and up to date with industry practices. 

     

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