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  1. M

    TN-C-S and TN-S in adjoining flats

    The ground floor receives a TN-C-S feed from which a TN-S feed is taken for the upstairs flat, along with a 6mm earth cable from the TN-C-S earth block. Both flats share the same water supply. The upper TN-S cable has a simple earth clamp instead of being properly soldered to the sheath. My...