Timeswitch query

  1. Welderpaul

    Welderpaul Moderator Staff Member

    Messages:
    13,600
    Location:
    Yorkshire
    Recently installed and outside light. Feed comes from the lighting circuit in the room (L&N looped to switches) so added a further switch to isolate, feed then goes up into the loft, pops out to a photocell mounted on the gable, then back in the loft and out to the light. Installed, works fine.

    Decided I didn't need the light burning away all night so thought it would be an idea to add a timeswitch.
    Positioned before the photocell and set to turn on well before dark at 1pm. Switches off at 12pm. This means the photocell turns on as soon as its dark, then off at 11pm when everyones tucked up.

    Added the timeswitch and it no worky.

    Tested it insitu and there was no feed to the photocell when the clock is switched on. Took the timeswitch off and tested it on the bench - worked fine. Wired it back up and it doesn't work again.

    Is there something that photocells don't like about time switches?

    This is the time switch:

    IMG_8231[1928].jpg
     
  2. Seadog

    Seadog Forum Supporter

    Messages:
    6,970
    Location:
    NE London - UK
    Have you tried turning the dial by hand through 24 hours to make sure that you've wired it properly? (Obviously while measuring the power feed to the cell)
     
  3. Welderpaul

    Welderpaul Moderator Staff Member

    Messages:
    13,600
    Location:
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    Yes, as i turn it it switches on and off at the allotted hours.
     
  4. daleyd

    daleyd Member

    Messages:
    7,099
    Location:
    Wrexham, North Wales
    You have wired the light to the correct terminals (might sound daft but it’s easily done...)? I’m guessing there should be one set (live and neutral) that power the timer part and another set that are contacts for the load (in your case the light - usually just live in and live out)
     
  5. brightspark

    brightspark Member

    Messages:
    31,683
    Location:
    yarm stockton on tees
    some of those clocks are only 3 pin and some 4 if its a 4 pin you have to put a live link in from live supply to output terminal because they can be used on low voltage none mains terminals if its a 3 pin they only work on 240 volts and no link required
     
  6. eddie49 Member

    The dusk-to-dawn outdoor photocells typically need both Live and Neutral to be wired to them. Maybe your new timeswitch is only switching the Live to the photocell, and the neutral has got lost en route ?
     
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  7. daleyd

    daleyd Member

    Messages:
    7,099
    Location:
    Wrexham, North Wales
    Yes - should be a permanent neutral to photocell and a switched live in and out of time switch (or at least that’s the way I’d do it).
     
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  8. Welderpaul

    Welderpaul Moderator Staff Member

    Messages:
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    Neutrals are shared on the same terminal on the timeswitch and only the lives are switched...
     
  9. brightspark

    brightspark Member

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    Location:
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    3 or 4 pin clock ??? probably isn't but theres a 7 day dial u can turn to delete days off with
     
  10. Welderpaul

    Welderpaul Moderator Staff Member

    Messages:
    13,600
    Location:
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    Its a 3 pin clock, 7 day dial is set so no days are deleted. With a continuity test on (disconnected from the lighting circuit and just with a test feed on) when it spin the dial round it makes/breaks the circuit as it should is the arms click past the switch.
     
  11. Martinb Member

    Messages:
    17
    Location:
    Lancs UK
    Live in and live out wrong way round ?

    If its coming on manually as you turn it maybe no feed to clock?
     
  12. Welderpaul

    Welderpaul Moderator Staff Member

    Messages:
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    Location:
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    The neutrals are unswitched and in the same terminal in the timeclock so should be permanent to the photocell?
     
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  13. brightspark

    brightspark Member

    Messages:
    31,683
    Location:
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    when in situ have you checked the permanent feed 240 volt to the time clock terminals
     
  14. Welderpaul

    Welderpaul Moderator Staff Member

    Messages:
    13,600
    Location:
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    Yes, there was a feed to it.
     
  15. brightspark

    brightspark Member

    Messages:
    31,683
    Location:
    yarm stockton on tees
    link out the the photocell and see if the light comes on or test the feed in the photocell when the time switch is on
     
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  16. Welderpaul

    Welderpaul Moderator Staff Member

    Messages:
    13,600
    Location:
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    When it take the timeswitch out and Wago the wires together the photocell/light work fine.
    When the timeswitch is fitted and switched on, there is no current between L and N on the photocell.
     
  17. daleyd

    daleyd Member

    Messages:
    7,099
    Location:
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    Current or voltage? There will only be current when the photocell is actually turned on, ie the light is on (maybe a minuscule amount to power the photocell).
     
  18. Welderpaul

    Welderpaul Moderator Staff Member

    Messages:
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    Location:
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    *voltage;)
     
  19. brightspark

    brightspark Member

    Messages:
    31,683
    Location:
    yarm stockton on tees
    are the tappets set far enough apart off then on off then on . try leaving the the wiring in the clock and just put a link in between live and the live out put. if it works its the clock that's faulty
     
  20. daleyd

    daleyd Member

    Messages:
    7,099
    Location:
    Wrexham, North Wales
    :thumbup: Can you measure between the output side of the time switch and neutral? Should be the same result if it’s just one wire out to photocell. Make sure you strip enough insulation back and you don’t screw in on the insulation - it’s easy to just nip up on the insulation rather than the wire
     
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