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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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    Probably the black was sleeved blue from the old colour code standard for Neutral. There's some logic even if it's poor practice since there's no confusion for the Brown connection leaving the third conductor as Earth to be sleeved appropriately. The sleeving obviously needs to provide correct identification at each end! I usually over sleeve old Red and Black T+E if re terminating a socket using Brown and Blue heat shrink sleeving but leave some of the original cable visible.

    I remember being given an old electric fan heater as a young lad in 1970s from my uncle returning from a posting in Germany. I had to delve in to the innards to work out which colours to use for the plug as it was completely different to UK cable standards. I vaguely remember it possibly having red blue and yellow for the colours. Anyway it worked and I didn't get electrocuted. Mind you the oscilloscope cathode ray tube he gave me required construction of a 1.5kV DC supply in which I connected an electrolytic capacitor the wrong way in a voltage doubler. Good job it was contained in a metal case when it exploded.

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  • 0

    Probably the black was sleeved blue from the old colour code standard for Neutral. There's some logic even if it's poor practice since there's no confusion for the Brown connection leaving the third conductor as Earth to be sleeved appropriately. The sleeving obviously needs to provide correct identification at each end! I usually over sleeve old Red and Black T+E if re terminating a socket using Brown and Blue heat shrink sleeving but leave some of the original cable visible.

    I remember being given an old electric fan heater as a young lad in 1970s from my uncle returning from a posting in Germany. I had to delve in to the innards to work out which colours to use for the plug as it was completely different to UK cable standards. I vaguely remember it possibly having red blue and yellow for the colours. Anyway it worked and I didn't get electrocuted. Mind you the oscilloscope cathode ray tube he gave me required construction of a 1.5kV DC supply in which I connected an electrolytic capacitor the wrong way in a voltage doubler. Good job it was contained in a metal case when it exploded.

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