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electricbuddy 06-07-2011 12:52 PM

Troubleshooting a Projectů. HHEELLLPPP PPPLLEAASEEE!
I have installed recessed fluorescent lights in a Muti-family complex. (the fixtures ARE NOT covered with insulation). The fixtures are equipped with 1/26W fluorescent lamp and ballast is rated for use in both 120v and 277v operations. The sockets of the fixtures are from Leviton, the ballast is from Universal, and the lamp is from GE. I have installed the fixture however after two weeks the sockets keep melting. I have sent the fixture to a lab for independent testing but the test lab says there is nothing wrong with the fixture. I have tried troubleshooting the site but come-up empty handed. Does anyone have an idea of what can be the possible issue?

dmxtothemax 06-07-2011 07:57 PM

Are you sure they are wired correctly ?
How long do the socket last before they melt ?
There must be a heat issue !
Try running the light, then check the temp of the
1 - socket only.
2 - the whole fixture.
This is a good place to start.
Let us know what you find.

Bad/cheap design can cause bad connection,
which in turn causes heat.

Also the whole fixture can run too hot,
but there could be many causes of this.

Which one is it !

Wildie 06-07-2011 08:51 PM

Flourescent tubes have filements in each end. These are heated by applying 6 volts A/C. If you remove the lamp from the fixture and measure across the pins of each socket, you should measure 6 volts a/c (or thereabouts) when the ballast is powered on. Check both ends.
For this to occur the ballast must be wired incorrectly and checking the filament voltages should point this out.

dmxtothemax 06-07-2011 10:21 PM

The filaments are only used to start the tube up,
Once the starter opens up and the tube fires up
the filaments are disconnected by the starter.
But if the starter is stuck on (faulty)
this could cause the filaments to run
continuously and the heat would cause the
tube ends to be hotter than they should,
hense melted end caps.

frenchelectrican 06-07-2011 11:30 PM

dmxtothemax., Just keep in your mind the OP mention 26 watt CFL and I know with 4 pin verison they can be wired for either instat or rapid start fashion.

Now to OP did you try diffrent bulb manufacter some case it can slove the issue and is there any insluating materals that may affect the recessed luminaire ??

What voltage you are running I am pretty sure you are on 120 volts due the multifamily building.

Do this have any emergecy circuit involded ?

Are they on 24/7?

Are the bulb is in horzontal or vertical postion ?


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