Power to ceiling junction, but light won't work

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Old 04-08-18, 01:11 PM
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Power to ceiling junction, but light won't work

Yesterday I installed a new light over our dining table. I tested it after install and it worked fine. Later last night I turned on the light and it sparked and the light went out. I turned off the power and left trouble shooting for this morning.

Here's what I've discovered this morning -

-The breaker wasn't thrown and appears visually fine.
-The black wire may have grounded against the mounting plate - it looks like there is a small cut in the wire insulation. This probably occurred when I was shoving the wires back inside.
-After wrapping the wire in electrical tape and hooking up the light again, it's still not working - no light.
-When testing the wires coming from the ceiling (using multimeter), there is 120V between power and ground and 120V between power and neutral. I checked the light fixture by connecting the wires to an extension cord and it works (so the light fixture or bulbs aren't the problem).
-The light switch looks fine as do all the connections.
-Using an extension cord, I tried to hook-up a desk lamp the ceiling wires and also got no light.
-As far as I can tell, this light/switch is the only outlet on the breaker.

I'm stumped. Any suggestions as to what the problem might be?

Thanks,

-Ryan
 
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Old 04-08-18, 01:42 PM
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Is it on a dimmer or a regular switch?
 
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Old 04-08-18, 02:17 PM
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When testing the wires coming from the ceiling (using multimeter), there is 120V between power and ground and 120V between power and neutral. Using an extension cord, I tried to hook-up a desk lamp the ceiling wires and also got no light.
If you have 120 volts between hot (switch leg) and neutral the light should work. The desk lamp should work also. Recheck that you are measuring (with a multi meter) 120 volts between the switch leg and the neutral. If so, Remake your connections and try the light again.
 
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Old 04-08-18, 02:55 PM
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It was on a dimmer switch. I didn't think that was the issue since I was still getting power to the junction box, but I swapped the dimmer switch out for a regular switch and now it's working again. I suppose the dimmer must have shorted out. Thanks!
 
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Old 04-08-18, 03:35 PM
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Yes, dimmers fry easily. The reason you seemed to have 120 volts was there was no load.
 
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