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Old 01-13-2010, 12:33 PM   #1
sparky89
 
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house lights @ condos randomly tripping


I have 6 exterior fixtures and a flood light, also a photo cell on a new 20a breaker in a subpanel in maintenence room. I have bypassesd an old useless timeclock to only operate on new photocell. lights work when I'm there testing them. Time of trip varies from 2-3 days to over a week. I pulled all lights, redid all connections and siliconed around fixtures as I it appeared moisture was a problem. (big rain caused initial problem). I thought it was good until 2 days ago! breaker resets with no problem, then trips later at random. Any thoughts?
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Old 01-13-2010, 12:42 PM   #2
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What is the total wattage of all the lights?

Is the breaker a GFCI breaker? Or a regular breaker?
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Old 01-13-2010, 12:43 PM   #3
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Quote:
Originally Posted by sparky89 View Post
I have 6 exterior fixtures and a flood light, also a photo cell on a new 20a breaker in a subpanel in maintenence room. I have bypassesd an old useless timeclock to only operate on new photocell. lights work when I'm there testing them. Time of trip varies from 2-3 days to over a week. I pulled all lights, redid all connections and siliconed around fixtures as I it appeared moisture was a problem. (big rain caused initial problem). I thought it was good until 2 days ago! breaker resets with no problem, then trips later at random. Any thoughts?
Sometimes a (non-GFI) breaker will trip due to moisture (even steam) in significant amounts. In your case, it definitely appears that moisture is the problem. What could possibly be occurring is, that the insulation deteriorated at some point due to moisture. A good way for finding the problem would be with a MEGOHM METER (Megger, which is a brand name.) Testing the strength of insulation in the (individual) wires!
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Old 01-13-2010, 12:57 PM   #4
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It's a non-GFI breaker. Ok I will get a megger and use that next. If thats the problem I will end up replacing the bad wire, right? Thanks
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