Electrical Wiring in the Home/crackling behind switch plate

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Question
i would like to know about the crackling noise from my switch plate when i turned it on. i just noticed it. i'm afraid it will start a fire in the wall

Answer
It sounds like your light switch is arcing when you turn it on.

The switch wears out and instead of a quick snap close it allows the contacts to come close enough to arc before closing.
And, on top of that the contacts get worn out and they start to pit which leads to arcing.

The crackling noise you hear is the arcing.

You need to replace the switch with a good quality switch. And if the switches in your house are all about the same age it would be smart to just go ahead and replace them all with good quality switches.
About Electrical Wiring in the Home
This site answers questions related to home electrical wiring, home wiring, general electrical help,and other electrical questions related to aleternating current (AC). You can find help on the National Electical Code, home electrical issues, wiring electrical outlets, installing lighting, electrical grounding, and general electrical help for do-it-yourself projects not require an electrician. If you do not see your home electrical wiring question answered in this area then please ask your electrical wiring question here

Electrical Wiring in the Home

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Greg Hughes

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Troubleshooting electrical including appliances and HVAC.

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34 years of experience.

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Both college and tech schools in this field.

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