Question:
I have seen our lights flicker, sometimes staying out for three seconds and then they come back on. My husband checked the circuits in the basement and all is well. What could be the problem? I should mention, that our neighbors’ lights have been fine, so it’s definitely internal. At times all the lights go out throughout the house and sometimes they do not.
Answer:
Of all the symptoms that an electrical system can have, groups of lights that flicker is, in my opinion, the scariest. I suspect that you are getting some arcing somewhere. Arcing occurs when wire connections are close to each other, but not fully touching. The electric current jumps the gap, like lightning, and creates some heat. This heat could be minor, or it could be a serious problem, depending on how much current is jumping across the gap, and how wide the gap is.
This is not the same as a short circuit, although both can give off sparks. A short circuit occurs when the hot wire touches the neutral or ground wire, and normally the circuit breaker or fuse will trip, shutting off the power.
Arcing can occur for hours, days, weeks, even years, and it will never trip a conventional circuit breaker.
Arcing can cause enough heat buildup to start a fire. I don’t want to alarm you, but this could be serious.
Anyway, I would strongly recommend that you call an electrician at the earliest possible opportunity. I suspect that a wire has come loose somewhere, and troubleshooting is not something I can explain in an article. But you can try shutting off various circuits to see if the flickering can be narrowed down to a certain area. Many newer houses have all of their lights on one or two circuits, so it’s possible that the problem is limited to a lighting circuit. I strongly suggest you turn off all lights at night (most people do anyway) and perhaps even the water heater if it’s electric. Turn off the refrigerator at night if its lights are flickering. And make sure you have working smoke alarms. I’d put a battery-powered smoke alarm near the breaker panel, for now, just in case.
Please have this problem examined by a knowledgeable person as soon as possible.
Posted under Simple Home Maintenance
This post was written by admin on August 5, 2009
