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Christmas conundrum

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A light problem in every sense of the word.

I have put up the same 3 sets of garden LED christmas lights for the last few years. I plug a multi socket connector into a mechanical timer to turn them on and off and have never had a problem with this setup until this year.

All 3 switch on together but only one set switches off. Clearly both the timer and the lights are working - can anyone suggest a reason why only one set respond to the timer's shut down function.   
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Comments

  • !00% happy with the basic wiring, have checked the individual plugs in the multi socket but as all 3 sets of light are working they must be OK.

    The faulty shut down is the unknown bit
  • Heedtheadvice
    Heedtheadvice Posts: 2,772 Forumite
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    edited 18 December 2024 at 12:06AM
    Are you saying the 'faulty' set never switch off?
  • Heedtheadvice
    Heedtheadvice Posts: 2,772 Forumite
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    edited 18 December 2024 at 12:15AM
    Ok, it could be a wiring fault.
    Consider if the timer is a single pole switch I.e. designed to switch off the live wire feed but us actually switching the negative. Thus live is on all the time.

    Led power supply connected accross live and neutral....on off, switching.

    Led power supply connected erroneously live to Earth wire then switching off the neutral leaves power on to the lights ....on on, no switching.

    If so ( and anyway ) it ought to be checked by a competent person as it could be dangerous....and sounds like it is not connected via an earth leakage circuit breaker....
  • GDB2222
    GDB2222 Posts: 26,258 Forumite
    Part of the Furniture 10,000 Posts Photogenic Name Dropper
    Grandad99 said:
    !00% happy with the basic wiring, have checked the individual plugs in the multi socket but as all 3 sets of light are working they must be OK.

    The faulty shut down is the unknown bit
    What fun! Do you have a multimeter for checking? Has anything at all changed since last year, when exactly this setup worked as expected? 
    No reliance should be placed on the above! Absolutely none, do you hear?
  • No to both questions
  • RumRat
    RumRat Posts: 5,015 Forumite
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    Do you have another multi socket extension you could try to test? Apologies if that's been done...
    Drinking Rum before 10am makes you
    A PIRATE
    Not an Alcoholic...!
  • Heedtheadvice
    Heedtheadvice Posts: 2,772 Forumite
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    edited 18 December 2024 at 5:43PM
    ...if it was working last year...
    ...but not this...
    ...then something has to have changed 🤔

  • Agreed, the problem is what :(
  • Grandad99 said:
    Agreed, the problem is what :(
    Probably you.
    Being a year older.
    😁😁😁😁😁
  • GDB2222
    GDB2222 Posts: 26,258 Forumite
    Part of the Furniture 10,000 Posts Photogenic Name Dropper
    Grandad99 said:
    Agreed, the problem is what :(
    Are you using a different extension lead? 
    No reliance should be placed on the above! Absolutely none, do you hear?
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