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Testing Lightning Conductors and Earth Electrodes.

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I am just curious. A local church is having its lightning protection system inspected and tested any A.N. Other. It is an old Norman church with a tall tower.


The downleads are copper and have no disconnection points above the earth electrodes. I have seen inspection joints on other buildings so that the earth electrodes can be independently electrically tested.


How is testing carried out when the downleads are continuous please?


Thanks in advance.


Z.

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    It sort of depends what you need to know -there has to be another electrode somewhere, but ideally far enough away for distance not to alter the reading too much- If for example you have already a TNx supply earth you can push against then you can compare your local earthing with that - not for lightning perhaps, but OK for verifying radio earths and so on.
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    It sort of depends what you need to know -there has to be another electrode somewhere, but ideally far enough away for distance not to alter the reading too much- If for example you have already a TNx supply earth you can push against then you can compare your local earthing with that - not for lightning perhaps, but OK for verifying radio earths and so on.
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