wirenut1980
Senior Member
- Location
- Plainfield, IN
I have a customer who experiences a buzzing noise that he claims comes from his electrical panel, all CFL lights, all wall wart transformers, and his plasma TV.
He says he has tried turning off circuit breakers one at a time, and as he does that, the buzzing decreases a little every time. When they are all shut off, the buzzing does stop.
The buzzing happens in late afternoon and at different times at night. Sometimes it happens multiple times a day, sometimes it will go a week without happening. I have been there a couple times to set and download a monitor at the main service and the buzzing did not occur while I was there.
After I set the monitor, he says the buzzing intensity has been cut in half and it happens a lot less frequently and for shorter periods of time. While monitoring, I had him take down the times he heard the buzzing, so I could compare with the data.
When the buzzing occured, there was no change of voltage or current in the data. Everything looks hunky dorry with the data.
I am stumped on what to do next. I feel like he might have something loose in his main panel, but I don't think that explains the noise coming from the other things mentioned.
RFI could explain the plasma TV buzzing noise...but the only way that makes sense is if the RFI is coming from the loose connection in the panel. Is that possible?
The only problem with that theory is that I did not think that wall warts and CFL's would buzz as a result of RFI or a loose connection at the panel.
Any suggestions on what to look for next would be appreciated.:-?
Thanks!
He says he has tried turning off circuit breakers one at a time, and as he does that, the buzzing decreases a little every time. When they are all shut off, the buzzing does stop.
The buzzing happens in late afternoon and at different times at night. Sometimes it happens multiple times a day, sometimes it will go a week without happening. I have been there a couple times to set and download a monitor at the main service and the buzzing did not occur while I was there.
After I set the monitor, he says the buzzing intensity has been cut in half and it happens a lot less frequently and for shorter periods of time. While monitoring, I had him take down the times he heard the buzzing, so I could compare with the data.
When the buzzing occured, there was no change of voltage or current in the data. Everything looks hunky dorry with the data.
I am stumped on what to do next. I feel like he might have something loose in his main panel, but I don't think that explains the noise coming from the other things mentioned.
RFI could explain the plasma TV buzzing noise...but the only way that makes sense is if the RFI is coming from the loose connection in the panel. Is that possible?
The only problem with that theory is that I did not think that wall warts and CFL's would buzz as a result of RFI or a loose connection at the panel.
Any suggestions on what to look for next would be appreciated.:-?
Thanks!