djd
- Thread starter djd
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kwired
Electron manager
- Location
- NE Nebraska
- Occupation
- EC
I would like to know what the question is, then maybe I could give my opinion.
djd
the problem was lighting dimming in various apts. the reason would be the ground, that said is the problem, why does this happen? for instance voltage could cause dimming, but assuming this is not the case, how would a problem with the ground cause the dimming, I have a guess but really dont know.
the problem was lighting dimming in various apts. the reason would be the ground, that said is the problem, why does this happen? for instance voltage could cause dimming, but assuming this is not the case, how would a problem with the ground cause the dimming, I have a guess but really dont know.
Ruff-N
Member
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I would start at the POCO connections and work my way toward the meter bank (If a meter bank is there) could be a burned out lug,connector or wire nuetral or hot in the xfrmer or at weatherhead depending how POCO feed is coming to building or inside meter bank. I assume that is what you are asking for, your question is sort of vague.
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I would start at the POCO connections and work my way toward the meter bank (If a meter bank is there) could be a burned out lug,connector or wire nuetral or hot in the xfrmer or at weatherhead depending how POCO feed is coming to building or inside meter bank. I assume that is what you are asking for, your question is sort of vague.
kwired
Electron manager
- Location
- NE Nebraska
- Occupation
- EC
If your grounding problems are the open neutral type of problem you will not necessarily have just a dimming problem - you will have lights connected to phase A that dim when a load is turned on or off and the lights connected to phase B will get brighter at the same time. If you don't have this problem the chance of it being a neutral problem starts to lessen. It could be a high resistance connection any place between the POCO transformer and the loads affected, it could be long circuits or feeders not sized for voltage drop.
You need to take voltage and current readings both with load and no load balanced and unbalanced across the neutral as well as at the service vs at individual unit panels and maybe even at affected loads to get a better idea of where to look next. Someplace in this process you may find your problem and may not need to go farther.
You need to take voltage and current readings both with load and no load balanced and unbalanced across the neutral as well as at the service vs at individual unit panels and maybe even at affected loads to get a better idea of where to look next. Someplace in this process you may find your problem and may not need to go farther.
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