Quote:
Originally Posted by Flatbutt1
Danny-O I'll have them check for loose grounds ...but on a new panel?
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Loose neutral.
If the electrician who was installing the panel was in a hurry (typically to get to the bar before happy-hour ends), there's a chance he didn't tighten the mains. You should also check the neutrals on the bus bar and be certain there is only one neutral per screw. Also check for wire-nutted connections inside the panel (big no-no).
I recently worked on a home (new construction) where the homeowner kept hearing a loud hum through his TV and A/V equipment. Turned out the main panel (the entire home for that matter) was not grounded.