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Earth rod used in pme installation.

hertzal123
Came across an earth rod in the concrete floor of a rural garage.The Ra was 115 ohms.

Just wondering how effective in loss of neutral this would be.Most pipework was plastic,

so no mpb.Thanks for any opinions.

                                   Regards,Hz
  • 0
    If the installation draws 1A then you'd have 115V between the top of the rod and true earth (some distance away) - so "not much" I'd say.

       - Andy.
  • 0
    seconded - perhaps if it lit low wattage warning light between it and neutral, or if there is an RF reason for grounding.

    Perfeclty ok for tripping an RCD on a TT island of course, but utterly defeated if you connect the PEN derived TNCs earth to it.


    As a carrier of significant fault currents you are not doing much better than you would with a rod in a flowerpot on the windowsill....

    mike.

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