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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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    Morgaine Dinova:

     I found it hard to believe that these standards are a secret in the UK, and worse, that they are hidden behind an IET paywall so that only those with money can learn about them. In the absence of contrary information so far, I am sadly concluding that Arran and Simon were right.


    This is not what I would have expected from the IET, and is incredibly short-sighted. The Institution is supposed to be a promoter of engineering education and a role model for professional ethics in UK engineering, not a money-grabbing outfit focussed on its own profit above all things. Secrecy has no place in engineering standards, nor in engineering education, and it runs counter to informing students (or simply knowledge-seekers) about professional and legal requirements in installation wiring and setting a good example....

     




    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

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  • 0

    Morgaine Dinova:

     I found it hard to believe that these standards are a secret in the UK, and worse, that they are hidden behind an IET paywall so that only those with money can learn about them. In the absence of contrary information so far, I am sadly concluding that Arran and Simon were right.


    This is not what I would have expected from the IET, and is incredibly short-sighted. The Institution is supposed to be a promoter of engineering education and a role model for professional ethics in UK engineering, not a money-grabbing outfit focussed on its own profit above all things. Secrecy has no place in engineering standards, nor in engineering education, and it runs counter to informing students (or simply knowledge-seekers) about professional and legal requirements in installation wiring and setting a good example....

     




    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

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