Flickering is generally caused by loose connections, which can occur
anywhere along the circuit from the breaker to the end of the chain. You
need to check the neutral wiring as well as the hot


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Hello, From time to time, the lights on two of my electric circuits
flicker at the same time and to the same degree of intensity; other
lights on other circuits are not affected. When this happens, the load
within the house does not change (no AC units coming on, etc.) and the
bulbs are all tight. I have not checked to see the breakers to these
circuits are wired tightly but they appear to be set into the buss bars
correctly because they sit within the panel cover the way they should.
So, some type of voltage drop appears to be occurring on these
circuits. Can bad (old) breakers cause this type of fluctuation?
Other ideas? Thanks! D. MacQueen