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Reverse Polarity

bakey1959

Has anyone encountered a reverse polarity single phase PME supply to a house? If so, how did it happen and how was it detected?

I am intrigued to how you would discover it by measuring L-N, L-E, and N-E at the incoming side of the Main Switch, as the Earthing conductor would be connected to the Line at the cut-out and give 0V, the same as if it were correctly wired and you were measuring N-E?

I cannot get my head around how you would detect the issue.... maybe I will set it up on an empty standalone C/U and see what I get?

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    A full test kit is required:

    • Two pole approved voltage tester.
    • Voltage tester proving unit.
    • Non-contact voltage indicator..
    • A single pole contact voltage indicator that can be used whilst wearing PPE.

    https://martindale-electric.co.uk/product/smkit5-smart-meter-installation-kit/

    They can be bought as a kit or as I did individually. Having worked on some scary installations, I have acquired a selection of voltage testers, I have encountered reserved polarity on the meter tails and within the installation, but never on the DNO network.

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  • 0

    A full test kit is required:

    • Two pole approved voltage tester.
    • Voltage tester proving unit.
    • Non-contact voltage indicator..
    • A single pole contact voltage indicator that can be used whilst wearing PPE.

    https://martindale-electric.co.uk/product/smkit5-smart-meter-installation-kit/

    They can be bought as a kit or as I did individually. Having worked on some scary installations, I have acquired a selection of voltage testers, I have encountered reserved polarity on the meter tails and within the installation, but never on the DNO network.

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