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Bulbs keep blowing

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  • 26-01-2011 1:58pm
    #1
    u140acro3xs7dm
    Closed Accounts Posts: 1,512 ✭✭✭


    We have 2 fittings in our kitchen (similar to the attached pic)both working off separate light switches. They have the small screw in bulbs(e14 i think). Problem is that they just keep blowing, they will last a few days then bang. There is 4 bulbs in each fitting. Usually we are left with one bulb and after a few weeks that will blow too.

    We use 40w bulbs. An electrician had a quick look but i think he was busy and didn't want the hassle. He put a device maybe a multimeter into the socket and everything seemed fine to him but that's all he did. What could be causing this. It never trips a switch either.


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    #2
    10-10-20
    Registered Users Posts: 7,162 ✭✭✭10-10-20


    Are these 240v bulbs or 12v? It should be written on the bulb. E14 is screw-in, so it does not appear to be correct based on the photo.
    If they are 12v bulbs, you should test the transformer using a multimeter while it's under load. It should read less than 14v under load. If higher than this, it's a probable cause for the failures.

    In addition, what's in the room above the lamp? A bedroom? If so, vibration could be affecting the filaments. If you loosen the screws to limit the vibration somewhat, do the failures reduce?


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    #3
    u140acro3xs7dm
    Closed Accounts Posts: 1,512 ✭✭✭u140acro3xs7dm


    Sorry i took that picture off the net as i was having camera trouble so its not the exact model. They are the small screw in bulbs. It is also in a bungalow so nothing above.

    What is the transformer? is this where the bulbs go? sorry im a bit dumb when it comes to these things.


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    #4
    indie armada
    Registered Users Posts: 834 ✭✭✭indie armada


    firstly i think the bulb your talking about is a 40 watt r50.....google this to confirm.
    it could be a bad connection in the lamp holder or could be a poor quallity bulb. ive found the best manufacturer of this type of bulb is ge.


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    #5
    gazelec
    Registered Users Posts: 85 ✭✭gazelec


    As said above try to go for a different brand of bulbs (GE) next time and also make sure they are screwed in tight, loose connections on the bulbs can cause them to blow


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    #6
    beanie10
    Closed Accounts Posts: 466 ✭✭beanie10


    Some screw in bulbs holders have an anti vibration clip, when the bulb hits this it sometimes feel like its screwed in fully. Try screw them in a bit further but be careful.


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    #7
    u140acro3xs7dm
    Closed Accounts Posts: 1,512 ✭✭✭u140acro3xs7dm


    ill try screwing them in tighter but think they are pretty tight, as for different brands we have tried them all its being going on for a year or 2.


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    #8
    tiny timy
    Registered Users Posts: 531 ✭✭✭tiny timy


    Wear something over your hands when installing them ( glove, tissue), anything that won't let your skin touch them. The natural oils from your hands can play havoc with bulbs when they heat up. Try it and let me know.


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    #9
    mchammer
    Registered Users Posts: 225 ✭✭mchammer


    I would trace the wiring back to an earth and make sure the bulb holder device is properly earthed. No harm to check a few sockets with a multimeter to make sure you don't have a bigger earthing issue....


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