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T-N-S or TN-C-S ???? Help pls.

I have been asked to replace a consumer unit. All seems fine, and the incoming earth seems to be on the sheath of the incomer, so, TN-S. But, it says TN-C-S on the previous EICR. Did that spark make a mistake or is there something here I'm missing? Also, do we presume the Line and Neutral are in that cable going to the meter??? I hope so… Thx in advance.

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  • The 3 wire overhead screams split phase TT, but the cut out says single phase, and perhaps smacks of previous overload when it was a hot wire fuse,  so the flying tail may have been the earth of over head TNS. I share your “ what on earth ?” moment.

     

    I also wonder how the PVC fascia was installed under the insulator bracket. Well no not really, I imagine something was carefully dangled for the duration.

    What does the meter suggest, in the sense of volts between the wires, apart from ‘are you wearing your running shoes?’ If that flying tail is another phase it is time to make a call.

    Still someone installed that cut-out and thought the job good enough to seal up. After a pub lunch perhaps.

    Mike.

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  • The 3 wire overhead screams split phase TT, but the cut out says single phase, and perhaps smacks of previous overload when it was a hot wire fuse,  so the flying tail may have been the earth of over head TNS. I share your “ what on earth ?” moment.

     

    I also wonder how the PVC fascia was installed under the insulator bracket. Well no not really, I imagine something was carefully dangled for the duration.

    What does the meter suggest, in the sense of volts between the wires, apart from ‘are you wearing your running shoes?’ If that flying tail is another phase it is time to make a call.

    Still someone installed that cut-out and thought the job good enough to seal up. After a pub lunch perhaps.

    Mike.

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