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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?

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  • 0

     

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

    If the installation is P.M.E. earthed it will have an official P.M.E. earth terminal installed and a notice informing us of that. If the installation is TT earthed then the home owner is responsible for providing an earth electrode and suitable R.C.D. protection for the whole installation.

     

    The TT earth electrode has to be visible for inspecting and testing.

     

    411.5.

     

    Z.

Reply
  • 0

     

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

    If the installation is P.M.E. earthed it will have an official P.M.E. earth terminal installed and a notice informing us of that. If the installation is TT earthed then the home owner is responsible for providing an earth electrode and suitable R.C.D. protection for the whole installation.

     

    The TT earth electrode has to be visible for inspecting and testing.

     

    411.5.

     

    Z.

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