I noticed a slight humming noise coming from a subpanel in my house. Narrowed it down to a single GFCI breaker.
When I press the test button on this breaker and it trips to off, the sound is gone.
Its a barely noticeable sound (I have good hearing) and constant in tone.
The GFCI is for a dedicated circuit for a spa-type bathtub. Its humming even though the tub is NOT running and I would expect drawing no current (I don't think there is even a small load for electronics, though I can't be certain).
The breaker, if original, would have been installed in 1996 (the panel inspection sticker date). Here's the face of this breaker:
Is this OK? Should I be concerned or replace the breaker?
Update - There is one other identical breaker in the same panel which is normally off. I switched it on and it makes the same noise.
The panel mostly has standard breakers and also a few newish arc fault breakers, and those are all silent. Every breaker in the GE panel is a GE breaker, they should all be correct models for the panel.