Hum in wall and electrical panel

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  #1  
Old 11-29-15, 06:57 AM
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Hum in wall and electrical panel

I'm getting a hum in the wall that seems like it could only be the baseboard as it is most obvious when they come on in the morning. It's a pulsating hum with a short gap in between and it changes, after 30 mins it slows down as heaters are not on as much as the rooms are at temperature.

However, there is also a hum when I put my ear to the electrical panel. It reduces when I turn certain breakers off. Are the breakers likely to need to be changed?
 
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  #2  
Old 11-29-15, 07:21 AM
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Most cases the hum around the electrical panel will be a doorbell transformer.
IMO - the hum is nothing to worry about. Now if the breakers were warm...
 
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Old 11-29-15, 12:41 PM
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The doorbell transformer was already off. The hum is annoying though as it reverberates through the empty spaces in the walls.
 
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Old 11-29-15, 01:37 PM
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What do those certain breakers control,is the house electric heat?
Geo
 
  #5  
Old 11-29-15, 01:44 PM
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The ones that buzz the most seem to be 20A dual pole for heaters. I'm not sure if the wall buzz congress from the panel, the heaters, or both.
 
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Old 11-29-15, 02:29 PM
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The heaters likely have a transformer in them, maybe for the control wiring.
 
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Old 12-06-15, 08:16 PM
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They're all 240vv so I don't think it's that
 
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Old 12-06-15, 10:05 PM
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They're all 240vv so I don't think it's that
That is why they might have transformers. The control circuits might be at a lower voltage.
 
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