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How do you locate the cause of lights flickering when another circuit is activated?


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Wiki User
2015-07-15 19:27:30
2015-07-15 19:27:30

It could be caused by either a dimmer switch or a large load energizing while it is on (for example a clothes iron).


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Assuming there's nothing wrong with the light circuit itself, usually a large load on the same branch circuit (circuit breaker) will cause this. Is your refrigerator on the same circuit? When the compressor kicks on, it will drag down the voltage on the entire circuit. This is most easily noticed by flickering or dimming lights.

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