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Connecting Multiple Bemco/Ryefield Boards

GHEC
Ok I have a new build project where one Bemco/Ryefield board is not large enough to cover all apartments. 


I will need to install 3 to cover the number of outgoing ways required.


My questions is this. Given that there is one incoming bulk supply, what options are there to split it between the three? I know Lucy do an MSDB with a vertical busbar. Would the DNO accept daisy chaining these together? Or should we use a busbar chamber and tap-off to each board?


Any advice would be gratefully received.
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    I just had a quick look at SPENs earthing policy, and like most of the other DNOs they don’t seem to allow multiple services into ‘multiple occupied buildings’. 


    This is because of the risk of diverted currents running though the structural steel work with multiple PME services.


    So multiple services direct from the fuse ways in the DNO sub is probably not an option.


    Usually I would recommend the DNO cut out to terminate in communal area, with PME terminal provided. Then cable that to Lucy MSDBs, all SNE earthing. 


    Your load is a bit high though, surely you have multiple cores at that load?


    Simon

    https://www.spenergynetworks.co.uk/userfiles/file/EART-01-002.pdf
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  • 0
    I just had a quick look at SPENs earthing policy, and like most of the other DNOs they don’t seem to allow multiple services into ‘multiple occupied buildings’. 


    This is because of the risk of diverted currents running though the structural steel work with multiple PME services.


    So multiple services direct from the fuse ways in the DNO sub is probably not an option.


    Usually I would recommend the DNO cut out to terminate in communal area, with PME terminal provided. Then cable that to Lucy MSDBs, all SNE earthing. 


    Your load is a bit high though, surely you have multiple cores at that load?


    Simon

    https://www.spenergynetworks.co.uk/userfiles/file/EART-01-002.pdf
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