Load humming from power distribution cabinet

[AKFlyboy]

Originally Posted by Mr Mustang

Wow! What is this panel you speak of? Thanks for the response!

He's talking about the circuit breaker panel.

[Oldelevatorman]

Originally Posted by Mr Mustang

Hi all, we have a 2014 Montana 5th wheel (38' front living) there is a humming sound that seems to be getting louder over the years, coming from the power distribution cabinet, any ideas what that is and how to correct? I removed the access panel in the basement and saw nothing loose! Humming only happens when plugged into shore power!

Probably a relay in the transfer switch box. AC relays hum. You may or may not be able to quiet it down , either shut off the power and pull it apart and see if it’s dirty. Tap the box to see if it quiets down or spray contact cleaner on it and see if that helps. Ours kept getting louder and louder and we finally replaced the box. That relay is one of two in the box. The other one is used on generator power. If you have that type of set up!

[Mr Mustang]

Originally Posted by Oldelevatorman

Probably a relay in the transfer switch box. AC relays hum. You may or may not be able to quiet it down , either shut off the power and pull it apart and see if it’s dirty. Tap the box to see if it quiets down or spray contact cleaner on it and see if that helps. Ours kept getting louder and louder and we finally replaced the box. That relay is one of two in the box. The other one is used on generator power. If you have that type of set up!

Thanks for the reply! It seems like more of a vibration! I put some rubber mounts between the box and the panel it made it like it was when new! No relays in that box!

[bddadles]

If you have a built in EMS that may be the humming, buzzing, whatever you want to call it, that you hear. My progressive is in the basement and right outside the bathroom door and I can hear it buzzing.