any ideas on what would cause flickering on 2 circuits and buzzing on the breaker of a third circuit? I can hear a slight arcing noise at the breakers when the lights flicker. The buzzing on the third breaker stops when I shut the lights on that circuit. The flickering circuits are on one bus and the buzzing circuit is on the other bus. I tightened/checked almost everything in the panel and swapped breakers around, no change. I called the power company and they're going to check the supply line outside. It has been raining the past few days and I also have a transformer on the pole outside my house. I'll be calling an electrician if they don't find something definitive. Keeping the main off in the meantime. Thanks in advance.
Electrical – Flickering circuits
circuit breakerelectricalelectrical-panellighting
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Best Answer
Breaker types are not interchangeable, even though they "fit"
The problem is you have brand A panel and brand B breakers. That is not legal because it is not safe. At this point you have probably wrecked the busbars on the otherwise quality Murray/Siemens panel.
They may "snap in", but they don't snap in with the correct amount of clamping force or with the correct mating on the bus bars - and so they arc. If they had been arc-fault breakers, they would have tripped.
Very rarely, Brand X will make breakers specifically for Brand Y panels, but that's too rare to bother with and it won't save you any money.