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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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    Regarding the 24Kw water heaters. Ones that I have seen contain three elements, each of 8Kw, one element on each phase. Controlled individually by contactors or by solid state relays so as to give three different loadings according to water demand.


    If this is the case, then I strongly advise "rotating" the phases to either each flat or to each water heater. If this is not done, then I perceive some risk of overloading whichever phase supplies "one third heat"


    Rotating the phases between flats is probably the best option as it will better balance large single phase loads.

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  • 0
    Regarding the 24Kw water heaters. Ones that I have seen contain three elements, each of 8Kw, one element on each phase. Controlled individually by contactors or by solid state relays so as to give three different loadings according to water demand.


    If this is the case, then I strongly advise "rotating" the phases to either each flat or to each water heater. If this is not done, then I perceive some risk of overloading whichever phase supplies "one third heat"


    Rotating the phases between flats is probably the best option as it will better balance large single phase loads.

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