Please help strange buzzing object in the basement
Hello, this thing in my basement started buzzing today and I couldn't figure out why it is doing it and what it is. It is located in my basement enclosed in a plastic cap, and as far as I can tell the buzzing is from the two black boxes from the side.
It appears to have a switch in the switch box that controls it. So after shutting it down it stopped buzzing.
Any help identifying the thing would be greatly appreciated. Thanks.