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Has this any failings do you think? The door can be replaced.

There's no stopping me now.

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  • Correct Watson. The black earthing conductor disappears into a black duct from which the underground supply emerges. P.N.B? I can't see how the earthing can be TNS as the supply to the intake room is by overheads for the majority of a very long run. I can't see a separate earth conductor. Perhaps I'm missing something.

    It seems to be quite a small sized earth conductor for 400 Amp main fuses.

    Z.