Light bulb will not light up

Discussion in 'Electricians' Talk' started by geoff1962, Jan 9, 2019.

  1. geoff1962

    geoff1962 New Member

    I have changed the light bulb in one bed room and it would not switch on
    There is electric getting to the switch but only 107 volts using multimeter
    The light is the last one in line
    Tried different bulbs and the elelctric is getting to the lamp holder
    All the other lights work up stairs
    Can anybody help thanks
     
  2. big all

    big all Screwfix Select

    did you change any fitting or wiring anywhere pre this happening ??
     
  3. geoff1962

    geoff1962 New Member

    No
    But i have changed the switch,ceiling rose and lamp holder since
    Still the same
     
  4. terrymac

    terrymac Well-Known Member

    At the light fitting ,what is the voltage between switched line and neutral ,when the switch is on ?
    Can you post pics of wiring at rose and switch ?
     
    Last edited: Jan 9, 2019
  5. geoff1962

    geoff1962 New Member

    Yes will do soon
    The wiring at the rose is neutral 2 wires ,loop 2 wires and switch 2 wires and 2 earth wires
    I will get the voltage measurement this weekend thanks
     
  6. spirits are real 2016

    spirits are real 2016 Active Member

    it sounds like a loose wire check the connections at rose at the fitting before this one and are the wires making contact with the screws not on the insulation by mistake.
     
  7. geoff1962

    geoff1962 New Member

    Thanks i will check
     
  8. HarDeBloodyHarHar

    HarDeBloodyHarHar Active Member

    Looks like one of the loop-in/loop-out wires is not terminated properly. (and if its last in run, would it have a loop-out?)
     
  9. geoff1962

    geoff1962 New Member

    What does that mean ?
     
  10. Isitreally

    Isitreally Well-Known Member


    In a round about way it means what Spirits are real 2016 said.


    If this is the last light in the radial than the problem must lay with a loose wire in the light rose before it.
     
  11. geoff1962

    geoff1962 New Member

    Ok thanks will check
     
  12. terrymac

    terrymac Well-Known Member

    I assume this includes the conductors going to the lamp. If it does then the rose would be the last one on the circuit.
    Re reading your original post ,you said 107 volts was present at the switch using a multimeter. Was this measured Line to earth ,or line to neutral ?
     
  13. Bazza

    Bazza Well-Known Member

    I'll bet he is measuring between the blue and brown wires on the switch........
     
    terrymac likes this.
  14. geoff1962

    geoff1962 New Member

    Line to neutral
     
  15. terrymac

    terrymac Well-Known Member

    Was the " neutral " connected to one of the terminals of the switch ? That would more likely be a switched line. What colours are the conductors present at the switch ?
    Neutral would not usually be present at the switch with the loop in wiring at the ceiling rose set up that you appear to have.
     
  16. terrymac

    terrymac Well-Known Member

    Or red and black !!
     
  17. geoff1962

    geoff1962 New Member

    Two reds
    One live and the other switch
    The light worked before the bulb was changed
     
  18. spirits are real 2016

    spirits are real 2016 Active Member

    youve tested live to live you need to check voltage at the lamp holder
     
  19. geoff1962

    geoff1962 New Member

    Thanks i will do
     
  20. HappyHacker

    HappyHacker Member

    Is it an Edison screw fitting? If so the centre spring may not be making contact with the bulb. Otherwise it's a case of testing at various points on the circuit to find the fault, which to do safely requires the correct equipment and knowledge.
     

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