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Dating electrical cables in old house

  • 27-07-2017 9:27am
    #1
    kevmoroney
    Registered Users, Registered Users 2 Posts: 10 ✭


    Hi,

    I recently purchased a house that was probably build in the 30's. A modern circuit board has been installed at some point, but there seem to be a couple of differently coloured wiring circuits in the house. The oldest part of the house has a circuit with the following colours:

    Red - Live
    Black - Neutral
    Bare - Earth

    In an extension (from the 90's I think), the wiring going to an electric Trition shower switch has Blue, Black and bare cables. Some of the light switches just have 2 Black cables with a layer of red plastic insulation underneath the black layer.

    Would anyone know when these colour schemes date from? Should I be thinking about a rewire of the house?

    Thanks,
    Kevin
    Tagged:


Comments

  • #2
    Risteard81
    Registered Users, Registered Users 2 Posts: 2,567 ✭✭✭Risteard81


    kevmoroney wrote: »
    Should I be thinking about a rewire of the house?
    Very likely.


  • #3
    tapfit2004
    Registered Users, Registered Users 2 Posts: 535 ✭✭✭tapfit2004


    kevmoroney wrote: »
    Hi,

    I recently purchased a house that was probably build in the 30's. A modern circuit board has been installed at some point, but there seem to be a couple of differently coloured wiring circuits in the house. The oldest part of the house has a circuit with the following colours:

    Red - Live
    Black - Neutral
    Bare - Earth

    In an extension (from the 90's I think), the wiring going to an electric Trition shower switch has Blue, Black and bare cables. Some of the light switches just have 2 Black cables with a layer of red plastic insulation underneath the black layer.

    Would anyone know when these colour schemes date from? Should I be thinking about a rewire of the house?

    Thanks,
    Kevin

    The oldest part sounds like it definitely needs rewiring. The black wires at the light switches sound like old rubber cables and definitely need to be replaced and if you are doing all that you may as well do the extension as the lifting of floor boards etc will already be done wiring the old parts of the house.


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