Rules and Guidelines
Want to participate in the discussions? Please read our Community Rules and Guidelines. Need some help? Visit Support and Answers.

  • State Not Answered
  • Locked Locked
  • Replies 4 replies
  • Subscribers 32 subscribers
  • Views 2168 views
  • Users 0 members are here
Options
You may also be interested in
This discussion is locked.
You cannot post a reply to this discussion. If you have a question start a new discussion

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.





    It's a while since I looked at the water regs (bye laws as they were then) - but it certainly used to be possible to take potable water from a storage cistern (technically not a tank) - it used to be the case you needed a lid (to keep large items of detritus out), mesh filters on all the remaining holes (to exclude insects etc), dip tube on the overflow and thermal insulation to help keep the stored water cool. Kits of parts used to be sold as "Byelaw 30 kits" after the number of the regulation at the time.


      - Andy.
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.





    It's a while since I looked at the water regs (bye laws as they were then) - but it certainly used to be possible to take potable water from a storage cistern (technically not a tank) - it used to be the case you needed a lid (to keep large items of detritus out), mesh filters on all the remaining holes (to exclude insects etc), dip tube on the overflow and thermal insulation to help keep the stored water cool. Kits of parts used to be sold as "Byelaw 30 kits" after the number of the regulation at the time.


      - Andy.
Children
No Data

Join us to get the best from IET EngX.

Joining EngX lets you personalise your experience so you stay up to date on the topics that interest you, plus you’ll be able to make connections who are looking to collaborate, exchange ideas and more.

Join us Not now

Community Rules & Guidelines