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Pump set Power Supply for a Domestic Sprinkler System

Electron666

I am trying to finalise the power supply requirements for a pump set serving a shared water tank for both potable water use and also for domestic sprinkler system use to BS 9251.



Only apartments require a domestic sprinkler system – no landlord / communal areas.


The fire engineer and building control have both confirmed a secondary power supply is not required to the pump set.



Ideally we would like to feed the pump set from the load side of the main panel board via a MCCB.



However Section 5.9.1 of BS 9251 states the supply to the pump should come from ‘a separately fused connection taken after the meter and from the supply side of the fuse box ’ (I take this to mean the supply side of the customer switch in the plantroom).


Is there any guidance or publications that illustrate the required configuration in schematic form for this please? Is the fuse mentioned here a BS 88 fuse? If so, a concern might be difficulty in achieving 0.4s disconnection time.



Thanks in advance of any help


Parents
  • 0
    Potable water from a tank? Doesn't potable water normally come directly from the cold mains to the kitchen tap? Tank water can be contaminated by insects, birds or vermin etc.


    What happens if the tank is empty after many people use water from it? Will there be enough for the fire extinguishing purpose should the need arise?


    Z.
Reply
  • 0
    Potable water from a tank? Doesn't potable water normally come directly from the cold mains to the kitchen tap? Tank water can be contaminated by insects, birds or vermin etc.


    What happens if the tank is empty after many people use water from it? Will there be enough for the fire extinguishing purpose should the need arise?


    Z.
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