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Old 11-23-2011, 08:59 PM   #1
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new bathroom light flashes & blacks out.


I've changed out a few light fixtures before so thought this would be a simple project. Ha! I'd love input as to what I did wrong.

Took out the ugly old fixtures and got the black wire, white wire and copper ground wire. They are all doubled but I don't think that matters. The mounting bracket was wrong so I put up the new one with mollies, and I'm pretty sure I didn't drill into anything in the wall but could never be 100%

I got all the new wires hooked up, got a big flash, blew out the bulb, then nothing. Hung the alternate fixture, got another flash, then it went out. bulb didn't blow this time.

re mounted the original fixture, and get the same thing. flash and it goes out. It's been hanging there laughing at me for a week. I keep forgetting and hitting the lightswitch, and get a flash and again out. If I then try to turn it back on, it just stays out. It doesn't pop the GFI or the breaker, and the other lights on the same switchplate stay on.

I also replaced the switchplate but can't imagine that would do anything.

any suggestions?

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Old 11-23-2011, 09:01 PM   #2
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new bathroom light flashes & blacks out.


You may have pinched a wire when you mounted the new fixture, or driven a screw into a wire ...

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Old 11-23-2011, 09:05 PM   #3
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new bathroom light flashes & blacks out.


Call an electrician. It could be an arc fault issue.
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Old 11-23-2011, 09:23 PM   #4
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new bathroom light flashes & blacks out.


Thanks. I have, but he hasn't made it here yet. I was hoping to beat him to it. Maybe I'll at least try undoing the bracket and see if I crimped the wire.

Last edited by rachelb; 11-23-2011 at 09:24 PM. Reason: completion
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Old 11-23-2011, 09:24 PM   #5
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new bathroom light flashes & blacks out.


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Thanks. I have, but he hasn't made it here yet. I was hoping to beat him to it.
Its best to leave that to a professional. Should just cost you the service charge.
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Old 11-23-2011, 09:25 PM   #6
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new bathroom light flashes & blacks out.


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You may have pinched a wire when you mounted the new fixture, or driven a screw into a wire ...
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Call an electrician. It could be an arc fault issue.
what's an arc fault?
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Old 11-23-2011, 09:26 PM   #7
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new bathroom light flashes & blacks out.


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what's an arc fault?
Its when zuess farts.....
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Old 11-23-2011, 10:44 PM   #8
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new bathroom light flashes & blacks out.


A flash means there was an arc,
That means you have either a wire with damaged insulation,
or a broken wire which is arcing over,
Carefully examine all wires for obvious damage
no matter how small, any burns or anything sus.
Last resort watch from a distance and have someone turn on the power,
you might see exacity where it is arcing over !
Be carefull, not too close !
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Old 11-24-2011, 05:01 AM   #9
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new bathroom light flashes & blacks out.


Took out the ugly old fixtures and got the black wire, white wire and copper ground wire. They are all doubled but I don't think that matters.
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Well, maybe it does matter. You say they are all doubled. So are you including the switch wire with these?

You say light fixtures - plural . Are there two different fixtures? How many sets of wires come out at each fixture.

If you are taking the switch wires and hooking them black to black and white to white like everything else, it will blow the fuse every time !!!

Jim
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Old 11-24-2011, 06:37 AM   #10
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new bathroom light flashes & blacks out.


Quote:
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Call an electrician. It could be an arc fault issue.
I'm curious too, what is an arc fault?
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Old 11-24-2011, 06:46 AM   #11
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new bathroom light flashes & blacks out.


Where precisely did the big flash happen? In the light bulb or somewhere else (nearby?)?

Arc fault -- When two wires or metal parts almost touch where they should not touch and current flows across, jumping through the narrow air gap, producing a visible continuous spark.

An arc fault interrupter is a circuit breaker with electronics that sense that an arc is happening somewhere in the circuit and cutting the power when that happens. Because an arc generates heat and can start a fire.
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Last edited by AllanJ; 11-24-2011 at 06:56 AM.
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Old 11-24-2011, 08:53 AM   #12
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new bathroom light flashes & blacks out.


Allan, I know what an arc fault is, I was just asking the "Doctor".
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Old 11-24-2011, 12:31 PM   #13
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new bathroom light flashes & blacks out.


Quote:
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Allan, I know what an arc fault is, I was just asking the "Doctor".
Not you. Her.:
Quote:
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what's an arc fault?
----------
Quote:
Originally Posted by OhioHomeDoctor View Post
Its when Zeus farts.....
Ah yes. He's the one who hurls the lightning bolts.
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Stop wasting time re-adjusting the pattern. Have several lawn sprinklers, one for each pattern.

Last edited by AllanJ; 11-24-2011 at 12:35 PM.
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Old 11-24-2011, 01:34 PM   #14
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new bathroom light flashes & blacks out.


lol Sorry Allan.
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Old 11-28-2011, 08:25 PM   #15
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new bathroom light flashes & blacks out.


Thanks everyone for the input.
scott the electrician came today.
the flashing from the fixture was the bulb turning on then immediately off. turns out the switch was faulty.
replaced that, and all is well.

this is a great site. I'll be back the next time I almost blow something up.
Thanks!

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