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Historical Wiring.

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The old days where house main earthing leads were green 6.0mm2. Ring "mains" were wired in 2.5mm2 T&E with 1.0mm2 earth continuity conductors. And the use of plastic oval conduit in plaster was common.

Is this compliant? Please see picture.

Z.

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    If we were starting afresh without existing colour codes, then a sensible choice in my view would be

    White for neutral, as white is a neutral sort of colour.

    Brown/green striped for earth, as the earth IS brown. A striped wire is good for earth as it stands out, make the other colour green because most things growing in the earth ARE green.

    Red, violet and blue. for the three phases. Cant use yellow for phase as too much like white chosen for neutral. 

    Grey and black reserved for other conductors such as ELV when required to be different to line voltage.

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  • 0

    If we were starting afresh without existing colour codes, then a sensible choice in my view would be

    White for neutral, as white is a neutral sort of colour.

    Brown/green striped for earth, as the earth IS brown. A striped wire is good for earth as it stands out, make the other colour green because most things growing in the earth ARE green.

    Red, violet and blue. for the three phases. Cant use yellow for phase as too much like white chosen for neutral. 

    Grey and black reserved for other conductors such as ELV when required to be different to line voltage.

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