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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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    gkenyon: 
     

    KevinF: 
     

    i'm trying this - but it's octopus and they won't speak to me as I'm not their customer!

    Whilst Octopus may be the supplier (on the energy bills) …  they are probably not the DNO.

    I'd say definitely not the DNO. Octopus are just the retail supplier. Should be straightforward to determine DNO from geographical location. We're with Octopus but DNO is SSE (North Scotland).

    OP needs to determine the DNO and determine the earthing arrangement.

     

    The Zappi EV charger does not require earth rod on PEN supplies as it has PEN fault protection. Would be interested to know the make of charger.

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  • 0

    gkenyon: 
     

    KevinF: 
     

    i'm trying this - but it's octopus and they won't speak to me as I'm not their customer!

    Whilst Octopus may be the supplier (on the energy bills) …  they are probably not the DNO.

    I'd say definitely not the DNO. Octopus are just the retail supplier. Should be straightforward to determine DNO from geographical location. We're with Octopus but DNO is SSE (North Scotland).

    OP needs to determine the DNO and determine the earthing arrangement.

     

    The Zappi EV charger does not require earth rod on PEN supplies as it has PEN fault protection. Would be interested to know the make of charger.

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