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Solution for Sparking Light Switches

Sparking Light Switches: Why You May See a Spark in Your Wall Switch and What to do About It.


Cause and Solution for Sparking Light Switches

Electrical Question: Why do my light switches snap and spark when I turn them on?.

This electrical question came from: Lee, a Homeowner from Sarnia Ontario, Canada.

Dave’s Reply:
Thanks for your electrical question Lee.

Sparking Light Switches

Why You May See a Spark in Your Wall Switch and What to do About It

Electrical Loads of Light Fixtures and Switches

Burnt Receptacle Outlet

Rated Size of  a Light Switch

More about Wiring Light Switches

How to Wire a Switch
electrical-switches

Wiring a Light Switch – Diagram 1

Wiring Diagrams

Fully Explained Light Switch Wiring Diagrams. Detailed Electrical Wiring Diagrams and Pictures assist your Home Electrical Projects.

Lighting For The Home

Lighting Electrical Codes

Electrical Outlet Wiring
outlet-wiring

Wiring Electrical Outlets for the Home

Home electrical wiring includes 110 volt outlets and 220 volt outlets and receptacles which are common place in every home. See how wiring electrical outlets for the home are done.

Using Electrical Testers
digital-tester

Understanding Electrical Testers

When working on home electrical wiring using voltage testers can play an important part in electrical safety. Electrical testers enable you to identify electrical circuits and help prevent the possibility of accidental electrical shock.
Types of Electrical Testers
Using Electrical Testers



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Wiring Home Electrical Circuits
120 Volt and 240 Volt Outlet Circuits
Wiring 3-Wire and 4-Wire Electric Range
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How to Troubleshoot and Repair Electrical Wiring
Wiring Methods for Upgrading Electrical Wiring
Electrical Codes for Home Electrical Wiring
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MORE ABOUT THIS TOPIC: Light Switches

FAQs Frequently Asked Questions and Comments

5 Responses to “Solution for Sparking Light Switches”
  1. andrew says:

    Last night I was installing a shelve to a wall and when I drilled a screw on the wall (using a driller), I saw some sparks on the light switch (we opened the plating to find the stud) and then the lights turned off. I went for the breaker and turned it back on and it’s all working now.

    Should I be concerned? Please let me know what to do.

    • Dave Rongey says:

      Hi Andrew,
      From what has been described, it appears that the electrical wiring has been drilled into and sustained damage which caused the circuit breaker to trip off. Therefore, and for the sake of safety, the portion of the wall where the work was being done should be opened so the electrical wiring may be inspected, and then repairs should be made as needed.
      I hope this helps,
      Dave

  2. Tracey anwar says:

    When I switch my light off I can see a very faint spark in the bottom left side of the switch. Is this dangerous? Do I need an electrician or is it an easy fix that can be done on my own. It only sparks when I switch it off.

  3. Virginia says:

    I recently purchased a 1965 home in Oklahoma The home had original receptacles and switched in small metal back boxes. We replaced most of the switches and receptacles a couple months ago with new Leviton Decora 15 amp. Last night when I turned on the switch to the light/fan in my bedroom a huge arc (flash of flame) erupted from the switch! Scared me silly. I turned off the fan light and now I am wondering what happened, and what should we do next?

    • Dave Rongey says:

      Hi Virginia,
      An arc flash can be the result of an electrical load that is being switched on or off, or an electrical fault. A typical fan light in good condition should not produce a flash as you have described. The fan light should be checked to make sure it is in good condition and operating according to the manufacturers electrical specifications, and the wiring to the switch should be inspected to make sure there are no loose connections.
      Dave

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