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P.M.E. and a Broken Neutral.

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Nowt ont box? Then try this to challenge the mind.

Podcast 77: Earthing pt 3, Hazards and Neutral Current Diversion - Bing video


Z.
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    IMHO we need to return to proper earthing and cease new PME installations.


    In built up areas, 4 core mains with the armouring providing a metallic earth path back to the substation. This armouring to be additionally earthed by local earth rods at each consumer, where possible, and by earth tape at joints in addition.


    In rural areas, TT with a requirement that new installations have DUPLICATED RCD/RCBO protection. E.G. each circuit on an RCBO and with a from end 100ma time delayed RCD to give a second line of defence.
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  • 0
    IMHO we need to return to proper earthing and cease new PME installations.


    In built up areas, 4 core mains with the armouring providing a metallic earth path back to the substation. This armouring to be additionally earthed by local earth rods at each consumer, where possible, and by earth tape at joints in addition.


    In rural areas, TT with a requirement that new installations have DUPLICATED RCD/RCBO protection. E.G. each circuit on an RCBO and with a from end 100ma time delayed RCD to give a second line of defence.
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