Posting a message to the forum will remove the above advertisement

Discuss PME system with earth rod aswell in the Electrical Wiring, Theories and Regulations area at ElectrciansForums.co.uk.

Please make sure you checkout our forum sponsors, many do discounts for members and, they keep the forum free to use.
  1. Gavin John Hyde
    Offline

    Gavin John Hyde the lights are on but nobody is home

    Location:
    Kingswood
    Business Name:
    Sulis Electrical Services
    Been on a job today and debating what to put on the certificate.

    The DNO in early 2013 upgraded the supply and installed PME. The previous setup had an earth rod installed. This is still connected to the main earth terminal. Not sure what type the previous set up was as the customer is none the wiser, As the upgrade was done just before she bought the house.all she cared about was that things come on and turn off when required.

    I am only filling in a minor works certificate as it only involved extending a radial.

    In terms of earthing arrangement would you all agree i have been okay to record it as PME with a supplementary TT rod. making a note in the comments box mentioning there is a rod aswell? Guess it will be 18th edition compliant before its time!

    I have so far filled it in as a PME system and am wondering if in addition to recording the Ze of 0.29 ohms i should record Ra aswell? I haven't measured it as of yet as i went with its a PME with supplementary rod.

    I have to go back Monday next week to change a light fitting, so can measure Ra if needed.

    It does raise the prospect of whether the certificate forms will be updated to reflect 18th edition if supplementary rods are going to be needed.

    Thoughts welcome as it is something I haven't dealt with or potentially noticed before as most of my experience is light commercial such as pubs.
     
  2. Ian1981
    Offline

    Ian1981 Electrician's Arms

    Location:
    North east
    If it's been changed to pme then why bother with the earth rod?
    By definition from the DNO having Carried out works it's a TN-CS earthing arrangement
     
    • Agree Agree x 1
  3. telectrix
    Offline

    telectrix Scouser and Proud of It Trusted Advisor

    Top Poster Of Month

    Location:
    cheshire/staffordshire
    Business Name:
    Telectrix
    i'd just do as you suggest. record Ze and PME earthing , with a note saying there is a supplementary rod.
     
    • Agree Agree x 2
  4. Wilko
    Offline

    Wilko Electrician's Arms

    Location:
    Berkshire
    Business Name:
    Wilko Electrics
    Agree TNCS as its the dominant system, with a note.
     
    • Agree Agree x 1
  5. telectrix
    Offline

    telectrix Scouser and Proud of It Trusted Advisor

    Top Poster Of Month

    Location:
    cheshire/staffordshire
    Business Name:
    Telectrix
    or diss the rod and say nowt.
     
    • Like Like x 1
  6. Gavin John Hyde
    Offline

    Gavin John Hyde the lights are on but nobody is home

    Location:
    Kingswood
    Business Name:
    Sulis Electrical Services
    Did think of that, but given the way people get slaughtered if something goes wrong this day and age, i figured its best to play it by the rules and not conceal things. ALso given the potential changes regarding supplementary rods in the 18th ed its worth thinking about now.
     
  7. Vortigern
    Offline

    Vortigern Electrician's Arms

    Location:
    England
    Business Name:
    F.H. Electrical
    I imagine the younger people reading would see @telectrixs' comment "Diss the rod" as
    That is a crap rod and looks bad innit, nowadays:cool:
     
    • Funny Funny x 3
    • Like Like x 1
    Last edited: Aug 3, 2017
  8. telectrix
    Offline

    telectrix Scouser and Proud of It Trusted Advisor

    Top Poster Of Month

    Location:
    cheshire/staffordshire
    Business Name:
    Telectrix
    i know me and pete are both old coffin dodgers, but surely you can tell us apart. i'm the good looking one. :p:p:p
     
    • Funny Funny x 4
    • Disagree Disagree x 1
    • Winner Winner x 1
    • Optimistic Optimistic x 1
  9. Vortigern
    Offline

    Vortigern Electrician's Arms

    Location:
    England
    Business Name:
    F.H. Electrical
    Doh! You knew who I meant though:p
    EDIT: Don't know what you mean, maybe new glasses?
     
    • Like Like x 1
    • Funny Funny x 1
  10. Risteard
    Online

    Risteard Electrician's Arms

    Location:
    Derry, Ireland
    Business Name:
    Walsh Electrical Services
    It's TN-C-S. The fact it also has an Earth rod is irrelevant (in fact, it is a very good thing). No need to worry about Ra of the rod.

    Most of the rest of the world requires Earth electrodes on TN-C-S installations - it's about time JPEL/64 caught up.
     
    • Agree Agree x 1
  11. Gavin John Hyde
    Offline

    Gavin John Hyde the lights are on but nobody is home

    Location:
    Kingswood
    Business Name:
    Sulis Electrical Services
    JPEL/64 ????
    Whats that when its translated in to English?
     
  12. Ian1981
    Offline

    Ian1981 Electrician's Arms

    Location:
    North east
    It's the commitee that decide what regulations we should all now follow ie sticking in an earth electrode on TN systems
     
  13. westward10
    Offline

    westward10 In echoed steps I walk across an empty dream. Electrician's Arms

    Location:
    Northamptonshire
    Look in the front of BS7671 you will see the listings for the brains trust.
     
  14. Ian1981
    Offline

    Ian1981 Electrician's Arms

    Location:
    North east
    Basically they put a list of new regulations into a hat, give it a shuffle and each member picks out a regulation and they have a good chuckle over it!
    Let the b*stards (that's us)figure this one out mhaaaaahhhaaa
     
    • Funny Funny x 3
    • Like Like x 2
    • Agree Agree x 1
  15. Gavin John Hyde
    Offline

    Gavin John Hyde the lights are on but nobody is home

    Location:
    Kingswood
    Business Name:
    Sulis Electrical Services
    Ah okay, didnt get that on the find the correct answer test/ wordsearch for grown ups that is the 17th ed.

    It sounds like the same method american psychiatrists use when they update the DSM book of mental disorders. basically a shrink proposes a new condition based on what he has seen in patients or hospital. if enough other shrinks agree and put there hands up it ends up the big book and people can be labelled as having the said new condition. absolutely bonkers... and that's just the shrinks.
     
    • Agree Agree x 1
Loading...
Similar Threads - system earth aswell Forum Date
HV Earth System & LV earth system Industrial Electrician Talk May 2, 2017
Earthing System Advice Commercial Electrical Talk Dec 20, 2016
Off grid earthing system Solar PV Forum Dec 6, 2016
Earthing Systems Electrical Forum Sep 22, 2016
Earthing System Periodic Inspection Reporting & Certification Aug 25, 2016
Earthing Systems And Explanations. Electrical Forum Aug 23, 2016

Share This Page

  • Electricians Directory Post a Domestic Job Post a Commercial Job