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electrical question

Discussion in 'OT (OFF Topic) Forums' started by Piff, Nov 10, 2016.

  1. Piff

    Piff Hardcore MB Enthusiast

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    Just turned on a twin tube fluorescent light. Brief flash then nothing.
    Other lights on same circuit are ok. As it is twin tube, unlikely to be both tubes at once?
    Fitting is about 4 years old.
    It is a decorative fitting & will be a PITA to strip down. I also don't have my testing gear at home - can't access the gear until Sunday.

    What is the likely fault?
     
  2. Dec

    Dec Hardcore MB Enthusiast

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  3. GordonTarling

    GordonTarling Hardcore MB Enthusiast

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    Does it have one starter or two? It might also have an electronic ballast without a starter.
     
  4. Pontoneer

    Pontoneer Hardcore MB Enthusiast

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    The term 'starter' is a bit of a misnomer since they are really capacitors for power factor correction ( fluorescent tubes are inductive loads with current seriously lagging behind voltage ) and most tubes will generally 'start' without them .

    Remember CIVIL :D
     
  5. OP
    OP
    Piff

    Piff Hardcore MB Enthusiast

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    It's one of these - Linear T5
    Electrician I was using at the time fitted it for me and I can remember him swearing about how much of a fiddle it was to fit.
    I will have to take it apart..............
     
  6. GordonTarling

    GordonTarling Hardcore MB Enthusiast

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    We also have one of those in our kitchen - we had it fitted by the chap who re-wired the house, so I'm afraid I have no idea what's inside it, except to say that it's almost certainly the electronic ballast type, as it comes on a soon as it's switched on. My bet is on a ballast that's 'gone' somehow.
     
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  7. OP
    OP
    Piff

    Piff Hardcore MB Enthusiast

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    Just found the fitting instructions, but of course there is no specification to say what is contained inside the fitting
     
  8. OP
    OP
    Piff

    Piff Hardcore MB Enthusiast

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    Can't strip it down until Sunday and at that point I will be able to see the electronic ballast and search for an exact match.
    But, as it is a T5 2 x 28w, is this the sort of thing I need?
     
  9. Dec

    Dec Hardcore MB Enthusiast

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  10. OP
    OP
    Piff

    Piff Hardcore MB Enthusiast

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    On a related track, I have normal fluorescent batten fittings in the garage which are very slow to fire up (always have been from new). Is there something I can do to make them quicker to start?
    IIRC they are 1.50m, 58W
     
  11. Satch

    Satch Hardcore MB Enthusiast

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  12. OP
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    Piff

    Piff Hardcore MB Enthusiast

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  13. Satch

    Satch Hardcore MB Enthusiast

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    Could be or might need new tubes.
     
  14. OP
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    Piff

    Piff Hardcore MB Enthusiast

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    They were slow from new. Cheap fittings though as they were "only" for the garage.
     
  15. markmifsud

    markmifsud Hardcore MB Enthusiast

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    Last edited: Nov 11, 2016
  16. Dec

    Dec Hardcore MB Enthusiast

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    I had a tube die last week so replaced starter but that didn’t fix it so replaced the tube, which solved the problem.

    My tube is the same as yours, 1.5m x 58w and the original starter is ok, pictured below, it lights in less than a second, just how slow is yours?

    Mine is a 1 tube unit so a different starter may be required for a 2 tube unit like the one in the first video in this thread.

    Dec

    [​IMG]
     
  17. OP
    OP
    Piff

    Piff Hardcore MB Enthusiast

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    I've got 2 in the garage and they take between 4 & 10 seconds to fire up
     
  18. Dec

    Dec Hardcore MB Enthusiast

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    Is that 2 separate light fittings or a double unit? It would matter as the starter would be a different rating for a single and a double unit. If it’s always been 10 seconds to light then maybe the wrong starter is fitted, the are cheap anyway, probably 2 for a £1.

    Dec
     
  19. renault12ts

    renault12ts Hardcore MB Enthusiast

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    Wouldn't a double unit have two starters?
     
  20. OP
    OP
    Piff

    Piff Hardcore MB Enthusiast

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    2 separate fittings on separate switches.
     
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