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#183020 - 12/21/08 10:06 PM Florescent lights
schenimann Offline

Registered: 02/18/08
Posts: 194
Loc: Western North Carolina
We put up 158 florescent lights in commercial job. They all work from two switches through contactors. I was in a j box hooking up a emergency light with the breakers off for the emergency circuit. Realized that I had 120v from neutral to ground. I traced it to a row of lights.

I have a row of about 13 8ft t8 fixtures. I have a whip that comes into the middle. When I tie the hot in going either direction, I get 120v from neutral to ground. The Lights work. I know this should not be on the neutral or can this happen with fl lights. I've never had it before but I don't know that much about the internal working of ballasts.

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Arc Flash Clothing, Gloves, KneePads, Tool Belts, Pouches, Tool Carriers, etc. etc....

#183026 - 12/22/08 12:43 PM Re: Florescent lights [Re: schenimann]
LarryC Offline

Registered: 07/05/04
Posts: 776
Loc: Winchester, NH, US
Sounds like a missing N-G bond at the source. Do these lights come off of new transformer? If so, I suspect a missing bond.

Larry C

#183027 - 12/22/08 12:56 PM Re: Florescent lights [Re: LarryC]
macmikeman Offline

Registered: 07/16/02
Posts: 718
Loc: Honolulu, Hawaii
I bet the neutral is not continous to the neutral busbar. Start checking at the branch source first and then out to the lights. Open circuit someplace.


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