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  1. newtotest
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    newtotest EF Member

    Location:
    UK
    Looking for some advice on the best way to supply a 60amp submain to 12 flats which are to have their own meters within each flat (maybe) and who is responsible for doing the work.

    The project is a large ex club not a typical Block.

    I imagine the new 3 phase supply will be in to a ryeland board. From this point though I am unsure about the best way to supply each flat, as in

    Ryeland board > Fuse Isolator > Submain (25mm due to length) > Flat Service Head > Meter > Isolator > Consumer Unit

    or

    Ryeland board > Submain > Flat Service Head > Meter > Fuse Isolator > Consumer Unit

    Also would a 3 Core submain be required providing each flat TN-S or would it be 2 Core and TN-CS at each flat Service Head

    Any help much appreciated in the way these thing are usually done and who usually does which bits.

    Thanks
     
  2. Pete999
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    Pete999 Forum Mentor

    Location:
    Northampton
    Business Name:
    None
    Very difficult to advise without an eyes on appreciation of the construction, installation method etc.
     
  3. newtotest
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    newtotest EF Member

    Location:
    UK
    Hi Pete, At the minute its just a shell building. I have been advised by the DNO that they will be putting in a 3 phase cutout and isolator where we can take tails off to a distribution board of our choosing say a bemco board or something. I am not after specifics of sizes ect more a idea of what we need to price up e.g. 13 way bemco and tails to individual fused isolators in cellar then submain with a isolator (with seal-able lock?) in each flat. The cellar wont be accessible to tenants so the DNO was saying they can't put a bemco in the cellar?
     
  4. Pete999
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    Pete999 Forum Mentor

    Location:
    Northampton
    Business Name:
    None
    Will the "Tails" require RCD protection?
     
  5. newtotest
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    newtotest EF Member

    Location:
    UK
    No they won't
     
  6. westward10
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    westward10 In echoed steps I walk across an empty dream. Staff Member Moderator

    Top Poster Of Month

    Location:
    Northamptonshire
    You are doing too much guessing, you need much more info. Are the meters for the flats DNO meters.
     
  7. newtotest
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    newtotest EF Member

    Location:
    UK
    Hi Westward, yes the meters are to be owned by the utility companies so that tenants can switch supplier. thanks.
     
  8. westward10
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    westward10 In echoed steps I walk across an empty dream. Staff Member Moderator

    Top Poster Of Month

    Location:
    Northamptonshire
    If you are going to locate them in the flats with a service head you need to speak to the supply company.
     
    • Agree Agree x 1
  9. newtotest
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    newtotest EF Member

    Location:
    UK
    To this point I have spoke to Electricity North West who are only willing to put a service head cutout in. So spoke to the intended default supplier British Gas Connections who said we don't do it you need to use a 3rd party utility company we don't have any specifications. Surely everyone is not paying these ripoff nationals to install submains for every single block of flats?
     
  10. Pete999
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    Pete999 Forum Mentor

    Location:
    Northampton
    Business Name:
    None
    newtotest, have you actually requested a SP&N connection to each flat? I would have thought it would be benificial to the DNO to do this, but if they only supply the TP&N to the building, it will be up to you to supply the SP&N side of things, have you investigated the use of suitably sized busbar systems, rather than cabling to each flat, could be worth a shot.
     
  11. newtotest
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    newtotest EF Member

    Location:
    UK
    Hi Pete, we were trying to keep the cost down as the DNO charges a fortune and effectively subs out the work anyway. The busbar would be ideal but in this instance due to the layout 6 flats on top of 6 with no common areas isn't going to work well.

    For this reason I thought we could take the TP&N supply into a ryeland or bemco to distribute to the flats using it to fuse down the supply for the submains to say 80AMPS. Then in the flat put in a 60 Amp fuse isolator with a facility for a seal that the Meter installer can wire too. I can't see an issue with this because then the end user and meter company have no need to get access too the main incommer and distribution room as the 60amp should pop before the 80amp distribution Fuse.
     
  12. pmanku
    Offline

    pmanku Electrician's Arms

    Location:
    Hayes
    I would go with:-
    Ryeland board > Switch fuse> Submain (3core SWA ) > Red link > Meter > Isolator > Consumer Unit.

    Meter and Isolator fitted locally by DNO
     
  13. Leesparkykent
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    Leesparkykent Super Moderator Staff Member Super Moderator

    Location:
    Kent
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