Went on job where tenant complained of humming and buzzing in Electrical Panel Room. Checked and tightened all lugs. Incoming Line is Copper feeding bus bars for 15 meters in 3 meter packs. Feeders leaving are aluminum. Old Arrow Murray meter packs. Noticed buzzing was louder when meters were running faster. Is this common for increased current flow and loading? And is there anything to worry about?
Noise at meter packs
- Thread starter bucaroo
- Start date
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al hildenbrand
Senior Member
- Location
- Minnesota
- Occupation
- Electrical Contractor, Electrical Consultant, Electrical Engineer
One way to have a net magnetic field that would vary with load, would be if the service entrance or drop neutral had an open in it, and a lot of the unbalance current is going back to the transformer on the municipal metal water pipes shared by other buildings connected to the same transformer.
brian john
Senior Member
- Location
- Leesburg, VA
There are numerous connections behind the meter that are only accessible with a total outage and some disassembly. The question is is it a hum or a buzz? A buzz could be real issues.
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
So many possible responses, so little time (and Mod Squad leeway
).
ptonsparky
Tom
- Occupation
- EC - retired
Hum or buzz also depends on your age. Sometimes I just can't tell the difference. If it is buzzing long or loud enough there is usually a smell assoiated with the escaping smoke.
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