Our Voltimum Experts answer your questions on a daily basis in our Technical Expertise area. This Question of the Day, concerning a wind turbine installation and its earthing, is answered by the ECA:
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Question: I've recently been working for someone who is installing 17.5kW wind turbines, which he has installed with steel wire armoured cable (SWA) from the turbine. What issues are there with earthing? He is using an earth electrode for the mast earthing, but has not earthed the SWA. Surely this needs earthing, even only at the mast end? He told me that it is not earthed b ecause of the threat of lightning strikes.
Answer:The SWA of the connecting cable should be earthed at both ends.
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