The Ultimate PME/TNS Exportation! B-)

Discussion in 'Electricians' Talk' started by sinewave, Mar 25, 2007.

  1. sinewave

    sinewave Screwfix Select

    Existing PME/TNS supply at service position.

    Run a minimum of 10mm 3 core SWA cable to your external location, following all approved cable installation procedures.

    Terminate in to a Metal Clad Dis-Brd.

    Link SWA Earthing Tag to DB-1's MET with 4mm, despite it being a Metal Clad Dis-Brd. (Belts & Braces!)

    Drop an Earth Rod in as close as possible to DB-1 and connect back to DB-1's MET with 10mm

    Bond any metal services entering the remote building with 10mm

    Bond any exposed metal framework of the building with 10mm

    Resultant installation has an excellent Ze DB-1

    Resultant installation is tied down to 'True Earth' at it's remote location thus avoiding any 'potential' problems!

    Resultant installation avoids the need for expensive Time delayed RCD Split Boards!

    Comments and critisim gartefully received!
  2. wklivesvtime

    wklivesvtime New Member

    thanks for that sine! Will cut and paste to my ref material folder in the company file. Just a question is this still just called a tncs pme system or is it now a tt/tncs/tns hybrid. I would just put tncs pme on the certs
  3. Rabbit Rabbit

    Rabbit Rabbit New Member

    Are you saying that the source is a PME'd TN-S system Sine? i.e. a TN-S system that has failed and has been PME'd therefore TN-C-S?
  4. X

    X New Member

    I think Sinewave meant that the supply is either TN-S or PME and can for purposes of this cleverly thought out exercise be treated the same..

  5. sinewave

    sinewave Screwfix Select

    Peng has interpreted my scribblings correctly.

    This setup can be used for either a PME or a TNS system.

    It is basically an extension of what virtually all DNO networks are anyway.
  6. Lokkars Daisy

    Lokkars Daisy New Member

    I wondered why you didn't use that method for an earlier post re supply to steel container ?
  7. X

    X New Member

    Beware the ides
  8. sinewave

    sinewave Screwfix Select

    > Beware the ides

    Yes, most definitely..................

    It may just be an excellent one and upset the stalwarts 'Apple Cart'!
  9. sinewave

    sinewave Screwfix Select

    > I wondered why you didn't use that method for an
    earlier post re supply to steel container ?

    Just goin with the flow that night! ;)
  10. X

    X New Member

    You could try the suggestion over at the IEE and see the can of worms explode
  11. sinewave

    sinewave Screwfix Select

    Might just do that!

    Watch that space! :^O
  12. sinewave

    sinewave Screwfix Select

    The Deed is done! :O
  13. Lokkars Daisy

    Lokkars Daisy New Member

    Seniorsinewave ,I was tempted to reply , but as it's Sunday I resisted. Heaven knows what I might have said i had I weakened.
  14. 2 wheeled ant

    2 wheeled ant New Member

    Its good & expensive for sure!
    Covers every angle but you would never get the Job
    unless you like working for £5 an hour!
  15. sinewave

    sinewave Screwfix Select

    > Seniorsinewave ,I was tempted to reply

    Yes, some scroat pinched me name before I registered!
  16. JP.

    JP. Screwfix Select

    Exactly what LD was saying last need good accurate definitive information..I for one have copied Sine's method and pasted it into Word..this is really what is needed..good solid information.nice one Sinewave..:)
  17. sinewave

    sinewave Screwfix Select

    It would be nice to hear Lectricians views on the subject! ;)
  18. *welsh.wizard*

    *welsh.wizard* New Member

    I mentioned about TNS and PME on the IET Forum - the other day, the reason for which was an info request from my DNO/REC.
  19. JP.

    JP. Screwfix Select

    Sine..the SWA armour at it or leave it unearthed?..
  20. JP.

    JP. Screwfix Select

    Sine..the SWA armour at service it or leave it unearthed?....

    Would appreciate a reply so as I can head and close the document..thanks..

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