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Thread: HV Earthing Requirement for Underground Cabling

  1. #1
    Senior Member
    Join Date
    Feb 2013
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    M1 - M18 - M62 Triangle
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    HV Earthing Requirement for Underground Cabling

    Can anyone tell me if it is normal to install 3 metre earthing rods every 9 metres in the HV trench between the DNO sub-station and a 200 kW turbine site some 400 metres away ?
    There are more engines killed through lack of water than through lack of oil

  2. #2
    Junior Member
    Join Date
    Sep 2013
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    1

    Re: HV Earthing Requirement for Underground Cabling

    I put in 1.2 km of earthing for a 600mtr run of HV on a 500kw turbine.
    Earthing rods were at the end of 5 runs up and down a field.
    Originally we we were told we needed 1.7 km.
    The 1.2, once installed is proved to be overkill. We knew it would be, but warranties & banks,etc.

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