testing a ballast


Old 01-08-06, 08:59 AM
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testing a ballast

how do you detirmine if a flourescent. light ballast is bad?....what are the trouble shooting procedures? is there any test equip that will help?...thanks
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Old 01-08-06, 09:27 AM
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If there's any black stuff oozing out, it's bad. Otherwise, you usually just replace it if you think it might be bad. As is oft noted, it is sometimes no more expensive to replace the whole fixture than to replace the ballast.

If you have special conditions, you should pay attention to the sound rating of a new ballast, and to its temperature operating range.
Old 01-08-06, 02:40 PM
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You change the tubes. If they don't light and there are no starters on the fixture the ballast is bad.
Old 01-09-06, 08:02 PM
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Ballasts cannot be tested with common testers (VOM). There are high voltage and current considerations and a proper test would require a complex set up with equipment you do not have.

It's like cars: replace parts until it works!

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