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Dodgy garage installation - borrowed neutrals?

Chris Pearson
This photo appeared in a car advert which was mentioned in a motoring forum.


The three lines all appear to make their way to the 3-phase board, but I cannot quite see why is happening to the neutrals.


Presumably the meter fitters were content that all was in order, although I suppose that the supplier's' principal concern is billing.


Would nobody give it a satisfactory EICR?

fe04cba68d8023216b9d65ea7caac269-huge-8a324a46-e898-499a-9e06-beead3f8b6bf.jpg

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    most if not all modern meters only need the though connection in the live pole to sense current, this is them multiplied by the voltage from the outbound live side to the neutral  to get watts- the neutral has 2 terminals to allow loop-through wiring, but is in effect one terminal  for voltage sensing.

    The meter will read correctly with a 3 wire connection L in, L out, and N.  However, a 3 wire connection is frowned upon,not least because it can conceal an  abstraction mechanism - imagine if the neutral connection were high impedance. This installation may work OK, but it is very poor practice
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  • 0
    most if not all modern meters only need the though connection in the live pole to sense current, this is them multiplied by the voltage from the outbound live side to the neutral  to get watts- the neutral has 2 terminals to allow loop-through wiring, but is in effect one terminal  for voltage sensing.

    The meter will read correctly with a 3 wire connection L in, L out, and N.  However, a 3 wire connection is frowned upon,not least because it can conceal an  abstraction mechanism - imagine if the neutral connection were high impedance. This installation may work OK, but it is very poor practice
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