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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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    Engineer01:

    Hi Gareth,


    On larger developments which require more than 1 Ryefield board you would simply supply them from a Schneider "mode" board or similar, this allows each Ryefield to be unmetered to allow the apartments to get their own MPAN numbers.


    Substation supply to MODE usually 400A - Mode to BEMCO usually 200A per phase each via 95mm 4Core. This is pretty standard IDNO / BNO arrangement and standard sizes.


    If you have one incoming supply at present youll want the DNO/IDNO to modify the supply arrangement to serve the MODE board first to allow unmetered supplies to be taken from it. 


    The landlord supply can then either be taken from from one of the BEMCO boards if MD is under 70KVA or taken direct from MODE if you require greater.  


    I wouldnt recommend supplying any apartment from landlords supplies due to tenants rights to be able to switch energy supplier should they wish. With supply from landlords supply they will be responsible for sourcing energy supplier and would have to sell the electric back to tenants for no profit.   


    Hope thats useful and makes sense. 

     







    Hi Engineer01


    I wasn't aware of the Schneider Mode boards. Just had a look. 


    Makes perfect sense thanks. 

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  • 0

    Engineer01:

    Hi Gareth,


    On larger developments which require more than 1 Ryefield board you would simply supply them from a Schneider "mode" board or similar, this allows each Ryefield to be unmetered to allow the apartments to get their own MPAN numbers.


    Substation supply to MODE usually 400A - Mode to BEMCO usually 200A per phase each via 95mm 4Core. This is pretty standard IDNO / BNO arrangement and standard sizes.


    If you have one incoming supply at present youll want the DNO/IDNO to modify the supply arrangement to serve the MODE board first to allow unmetered supplies to be taken from it. 


    The landlord supply can then either be taken from from one of the BEMCO boards if MD is under 70KVA or taken direct from MODE if you require greater.  


    I wouldnt recommend supplying any apartment from landlords supplies due to tenants rights to be able to switch energy supplier should they wish. With supply from landlords supply they will be responsible for sourcing energy supplier and would have to sell the electric back to tenants for no profit.   


    Hope thats useful and makes sense. 

     







    Hi Engineer01


    I wasn't aware of the Schneider Mode boards. Just had a look. 


    Makes perfect sense thanks. 

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