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Dno isolators Switch only single poll

Discussion in 'Electrics UK' started by Mattrm, 9 Jan 2019.

  1. Mattrm

    Mattrm

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    is it standard practice for DNO isolators to only switch the live cable from the meter?
     
    Last edited: 9 Jan 2019
  2. AndyPRK

    AndyPRK

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    Not if it’s a seperate isolator
     
  3. Mattrm

    Mattrm

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  4. AndyPRK

    AndyPRK

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    I see what u mean
     
  5. SimonH2

    SimonH2

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    It seems to vary even within the same DNO - in my case ENWL.
    At the rental house, it's single pole with a Henley block for the neutral connection. The isolator is 2 pole, but there are labels shouting out that 2 of the terminals should not be used.
    On the other hand, last year I had them come and fit an isolator for me - and that's two pole switching both L&N.
     
  6. AndyPRK

    AndyPRK

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    Why have they even fitted that N block?
     
  7. SimonH2

    SimonH2

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    How else does the sparky replace the neutral tail (or whatever) without breaking the seal on the meter ?
     
  8. AndyPRK

    AndyPRK

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    Supply fitted before cu I guess
     
  9. Mattrm

    Mattrm

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    The meter was fitted shortly after I moved in (November 2018) as I had requested the energy supplyer change the prepayment meter to a normal one
     
  10. aptsys

    aptsys

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    It's fairly common.
     
  11. SimonH2

    SimonH2

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    Shouldn't matter since a significant reason for having the isolator is to allow for maintenance. So whether the supply is in before or after the CU shouldn't have a bearing on providing a means to disconnect/replace the neutral tail without breaking meter seals.
     
  12. Screech20

    Screech20

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    I’d be more concerned that it’s not fitted to a proper meter board.
     
  13. SUNRAY

    SUNRAY

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    Simple, he didn't have enough blue tail on the van.
     
  14. AndyPRK

    AndyPRK

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    he didn't come with very much then, if it won't even reach the isolator!
     
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