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

MrFox

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.

b13f6e8ca4a8740403be79c8a45433ce-huge-tns_or_tncs.png
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    If the PSCC and PEFC are very similar, it seems reasonable to conclude that there is a N-E link nearby and, therefore, record TN-C-S, but the reasoning ought to be explained on the report.

    In any event the EICR should give Ze and PFC. If PFC is significantly greater than 230/Ze, TN-S is more likely.

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    If the PSCC and PEFC are very similar, it seems reasonable to conclude that there is a N-E link nearby and, therefore, record TN-C-S, but the reasoning ought to be explained on the report.

    In any event the EICR should give Ze and PFC. If PFC is significantly greater than 230/Ze, TN-S is more likely.

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