[newspark80]

Troubleshooting a couple light fixtures that had the lamp holders blown out in an office building and found that the voltage at the fixtures was 96V to ground/neutral. Checked voltage at the breaker and got 117V. The run is only about 75 feet but it does splice at a couple boxes before the fixtures that burned out. Thinking that there must be a bad splice somewhere but I am not the buildings electrical vendor so I had to bow out before I dug to deep. Still would like to know what the likely problem for the voltage drop is.

Thanks in advance!

 

[brian john]

Multi-wire branch circuit? If so neutral issue.

 

[newspark80]

Multi-wire branch circuit? If so neutral issue.

Yes three phase 208/120. Can you define neutral issue? My first guess was a loose neutral in one of the boxes....

 

[brian john]

Yes three phase 208/120. Can you define neutral issue? My first guess was a loose neutral in one of the boxes....

Start at the panel and work your way ot. TURN OFF ALL LOADS, what you have is a potential equipment destroyer and fire hazard.

 

[newspark80]

Start at the panel and work your way ot. TURN OFF ALL LOADS, what you have is a potential equipment destroyer and fire hazard.

That was my plan but I had to let the buildings electrician do the troubleshooting.

The light fixtures (Special Italian made things) toasted. Cost to replace $4000 a fixture....

 

[Liqued]

Agreed loose neutral somewhere and that = heat and potential fire.

 

[newspark80]

Are halogen lamps dimmable? Could not find the switch but this could very well be the problem.

 

[Liqued]

Yes, but not all. If theres no kind of transformer or ballast in between, if there is it also has to be compatible with a dimmer. So in short most are but not all.