Adding light fixture to switch trips breaker

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Old 11-14-19, 02:21 PM
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Adding light fixture to switch trips breaker

As part of a major renovation, I had a professional electrician prewire a new ceiling light in a small bedroom for future installation.

I am coming back now to add the fixture and my first attempt tripped the breaker. The wiring for the outlets in the room is also routed through the ceiling j box, so Iím wondering if Iíve created a short through these connections.
Here is the layout of the box:

-1x yellow hot from wall switch
-1x orange hot from wall switch (presumably for a future ceiling fan)
-4 x white neutral all bundled with one wire nut. Each enters the box from a different conduit.
-4 x green ground

I tried attaching to the yellow hot and adding the neutral to the bundle with the other 4 wires, but the breaker tripped immediately when I switched it back on. My assumption is that I need to separate the neutral bundle in someway, but Iím admittedly out of my depth.

Any help would be greatly appreciated.
 
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Old 11-14-19, 03:23 PM
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What wires are at the switch?
Could the fixture be defective?
 
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Old 11-14-19, 04:04 PM
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Thanks for your reply.

I will take photos of the ceiling box and wall switch this evening.

I figure itís far more likely that I made a mistake in wiring, but itís possible the fixture is defective. Itís brand new so Iíve never seen it operate correctly. Unfortunately Iím not sure how to test this short of swapping it in for a fixture that currently functions...
 
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Old 11-14-19, 04:28 PM
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You can check the switch with a VOM meter set on continuity. If on full continuity, if off, none. You can check the hot wires with the voltage calibration switch on the VOM. You have a 3 conductor cable (usually its black, white and red and of course a bare copper for ground). Could it be that the neutral was hot?

yel wire______to switch______yel wire to__________light_______neutral. This completes a circuit.
 
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Old 11-14-19, 05:23 PM
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Temporarily wire a cord to the fixture and plug it into a gfci receptacle.
 
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Old 11-14-19, 09:12 PM
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Thank you for the suggestions.
I pulled out the wires again tonight to take a picture and quickly realized my mistake. I happen to
be colorblind, and it turns out what I had assumed to be ďgreenĒ wires were really black...

Anyway, itís great to know a community like this exists. I have plenty more work to do on the house so will probably checking back in from time to time.

 
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Old 11-15-19, 05:36 AM
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Before using a VOM meter or multimeter set to ohms or resistance or continuity, turn off the power. At least one of the two places to which you touch the respective meter test wires or clips to must be labeled, unhooked and by itself.
 
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