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wiring query

  • 27-10-2016 9:30pm
    #1
    Registered Users, Registered Users 2 Posts: 1,673 ✭✭✭


    an old light from ceiling was removing shade putting new light up took a photo of it but when i wire it up nothing happens there are 5 wires three coming form ceiling one is grey with red inside one is grey with blue inside then there is a third which has two wires connected to each other and one is grey with black underneath

    the other two are the lamp blue brown is it possible that the black is the neutral and not the blue

    ps over 40 years old


Comments

  • Registered Users, Registered Users 2 Posts: 22,584 ✭✭✭✭Steve


    Not really clear from the photo what is going on, could you take one in-focus?

    Wiring of this vintage: red is live, black is neutral, there would be no earth to a light fitting. Not sure what the blue you mention is for, can't see it in the photo., it might have been added later?

    Electrical forum would be better for this.


  • Registered Users, Registered Users 2 Posts: 73,520 ✭✭✭✭colm_mcm


    Did you note where each individual cable was originally connected in the old fitting?

    Have you connected up all the old cables into the new fitting or just some of them?h


  • Registered Users, Registered Users 2 Posts: 1,673 ✭✭✭torrevieja


    i did connect the blue to blue red to brown the black one there i thought was eartth


  • Registered Users, Registered Users 2 Posts: 161 ✭✭Skihunta13


    torrevieja wrote: »
    i did connect the blue to blue red to brown the black one there i thought was eartth

    Black would have been a neutral colour in that age of wiring. More than likely there is no earth in that wiring.


  • Registered Users, Registered Users 2 Posts: 22,584 ✭✭✭✭Steve


    torrevieja wrote: »
    i did connect the blue to blue red to brown the black one there i thought was eartth

    The hanging cable brown goes to red (live)
    The hanging cable blue goes to black (neutral)

    I can't see the blue wire you are referring to that goes to the ceiling.


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  • Registered Users, Registered Users 2 Posts: 1,673 ✭✭✭torrevieja


    Steve wrote: »
    The hanging cable brown goes to red (live)
    The hanging cable blue goes to black (neutral)

    I can't see the blue wire you are referring to that goes to the ceiling.

    Your right steve it was funny how the other grey wire had blue underneath completely fooled me

    how come it didnt trip or blow a fuse when i connected it wrong


  • Registered Users, Registered Users 2 Posts: 22,584 ✭✭✭✭Steve


    torrevieja wrote: »
    how come it didnt trip or blow a fuse when i connected it wrong

    Electricticy is not fail-safe. It can easily kill you if you connect it wrong. Modern domestic installations have *some* safeguards (RCDs) but not on lighting circuits.

    I have a qualification and 20+ years of experience but, to you, I am just a random someone on the internet and you really shouldn't rely on that vs getting a professional in.

    I have no clue what the 'blue' wire in your case does and there is really no way I could tell without being there and tracing it. :)


  • Registered Users, Registered Users 2 Posts: 1,673 ✭✭✭torrevieja


    Steve wrote: »
    Electricticy is not fail-safe. It can easily kill you if you connect it wrong. Modern domestic installations have *some* safeguards (RCDs) but not on lighting circuits.

    I have a qualification and 20+ years of experience but, to you, I am just a random someone on the internet and you really shouldn't rely on that vs getting a professional in.

    I have no clue what the 'blue' wire in your case does and there is really no way I could tell without being there and tracing it. :)


    Well when i went to go up on the attic tonight the light up there was not working it seems that there is a feed from attic for that power going to that light,

    from that photo that blue wire from ceiling and the double wire black are connected together and the brown is connected to red , so i have the red with brown , but it seems the blue and black should be connected to the blue in the light bracket

    This fuse board is the old screw in type over 40 years old

    My father was an electrician but im not


  • Registered Users, Registered Users 2 Posts: 22,584 ✭✭✭✭Steve


    Can you explain in more detail what you did please?

    Did you replace the ceiling rose? is the pic of the old one? Can you post a better pic?

    I'm hesitating giving you advice because it's dangerous and if you don't 100% know what you are doing then you really need to call in an electrician.


  • Registered Users, Registered Users 2 Posts: 1,673 ✭✭✭torrevieja


    hi steve

    Well update this is sorted i put the black wire with the neutral into a netrual socket in light holder and it was feed to the attic light


    quote="Steve;101496961"]Can you explain in more detail what you did please?

    Did you replace the ceiling rose? is the pic of the old one? Can you post a better pic?

    I'm hesitating giving you advice because it's dangerous and if you don't 100% know what you are doing then you really need to call in an electrician.[/quote]


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