Rules and Guidelines
Want to participate in the discussions? Please read our Community Rules and Guidelines. Need some help? Visit Support and Answers.

  • State Not Answered
  • Locked Locked
  • Replies 44 replies
  • Subscribers 32 subscribers
  • Views 2776 views
  • Users 0 members are here
Options
You may also be interested in
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

EV install on a TT system - DNO PME?

Former Community Member
Former Community Member

Hi, new to this forum.

These might be obvious questions but I can't find an answer to it. 

Background.

A domestic house has a TT supply, has had a CU changed in 2019 but the new owners have no paperwork.

I can find no evidence of an earth rod anywhere and all the bonding cables go to the gas/water supplies. I did a quick Zs at the board = 2.9ohms. 

How do I know if the installation has been PME'd on the pole? (overhead wires)

Second part is - they want an EV charger installed that they brought with them from their old house. It will require TT, but as this property is TT it shouldn't need to have a separate rod.

If the installation is  a PME'd TT I would assume I would need to TT the EV?

Parents
  • 0

    PME or not PME that is definatley the question. It seems there's never a straightforward way to tell. Round here we get 0.238 ohm earth loop  but we definatley don't have PME the main earth is to the lead cable sheath BUT in at least one property at the end of the street has a green/yellow cable that goes from the neutral block to the main DB then onto the water pipe there's no PME label anywhere so what would I put on a certificate if I was writing one out? I know that at least one of the newer link boxes has an extra copper rod beside it. Who'd of thought earthing çould be so complicated!

Reply
  • 0

    PME or not PME that is definatley the question. It seems there's never a straightforward way to tell. Round here we get 0.238 ohm earth loop  but we definatley don't have PME the main earth is to the lead cable sheath BUT in at least one property at the end of the street has a green/yellow cable that goes from the neutral block to the main DB then onto the water pipe there's no PME label anywhere so what would I put on a certificate if I was writing one out? I know that at least one of the newer link boxes has an extra copper rod beside it. Who'd of thought earthing çould be so complicated!

Children
No Data

Community Rules & Guidelines