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Discuss Isolation and switching in the Electrical Forum area at ElectrciansForums.co.uk.

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  1. chris day
    Offline

    chris day Regular EF Member

    Location:
    london
    Business Name:
    Chris peter
    I have a question regarding isolation and switching arrangements.

    I want to work out what would work best within the regulations regarding splitting a new 200a TPN PME supply to serve flats above and a shop below.

    my initial thinking new 200a PME supply - Trunking above feeding a new ryefield giving me x2 100a 3 phase supplies. (2x100a 3 phase supplies)
    I would then have a x2 100a un- fused isolators for the shop and flats

    *will i need an isolator between the Ryefield and the service head
    *does the above sound feasible?
     
  2. Vortigern
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    Vortigern Regular EF Member

    Location:
    England
    Business Name:
    F.H. Electrical
    How many flats?
     
  3. chris day
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    chris day Regular EF Member

    Location:
    london
    Business Name:
    Chris peter
    there is already a Ryefield up stream with x4 45a S-Phase supplies for each flat respectively
     
  4. Spoon
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    Spoon Forum Mentor

    Location:
    Lancashire
  5. buzzlightyear
    Offline

    buzzlightyear please let me back in to the prison cell. Electrician's Arms

    Location:
    star command
    not three phase then ,you need to up grade the s/phase to 3phase cause of loading ,speak to you client and let them speak to the DNO .
     
  6. Nebu1a
    Offline

    Nebu1a Regular EF Member

    Location:
    Hampshire
    Business Name:
    Meo electrical
    Sounds like you are being the BNO. UK power networks have a good guide on this as I have been in a similar situation. Make sure you are in contact with the DNO and what their requirements are. Some DNOs may ask for a 3 phase isolator before the ryefield. If its a small install you may get away without one. I fitted switch fuses to my risers.
     
  7. Nebu1a
    Offline

    Nebu1a Regular EF Member

    Location:
    Hampshire
    Business Name:
    Meo electrical
    Sorry missed the bit about the second ryefield
     
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