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Lightning electrodes

lyledunn

A relatively small parish church has 8 down conductors connected to rod electrodes. Each electrode measured separately ranged from 215 ohms to 12 ohms with the overall value being around 8 ohms. Now I am aware that the overall value should be less than 10 and that each individual electrode should be no more than 8x10. We have one at 215 and one at 135, the others meeting that requirement. It is easy for me to advise that the system does not meet code but I do not have the expertise to assess the implications of the situation. I would appreciate your opinion. 

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    I would be inclined to try a new earth electrode in place of the worst one, a reading that high might suggest that most of the electrode has rotted away.

    Alternatively, could all the down leads  be connected together, in a ring. If buried bare copper tape is used for these connections then that will provide an extra connection to earth, in addition to linking together all the existing down leads.

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    I would be inclined to try a new earth electrode in place of the worst one, a reading that high might suggest that most of the electrode has rotted away.

    Alternatively, could all the down leads  be connected together, in a ring. If buried bare copper tape is used for these connections then that will provide an extra connection to earth, in addition to linking together all the existing down leads.

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