Yes. Originally. Energised July 1953. But these days it is the main interconnected system operating at 275kV and above, much of it 400kV, but plenty of 275 left in service and even being extended in places 👍🏻
James, I just clicked ‘like’ on this because of a seemingly historic and interesting detail then realised I have no idea what the numbers mean. Is it fair to say one shouldn’t put one’s tongue on it?
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