Sometimes when you turn a light switch on or off you may hear a crackling, arcing sound and even see a small blue flash of light.
Is this a problem? Could it be dangerous?
The spark is caused by an arc across the contacts as the switch is operated and could have a couple of different causes.
The contacts in the switch could just be worn out from repeated use. In this case the switch should be replaced.
Another cause of a sparking light switch is excessive load, with the switch operating too many lights. Normal light switch mechanisms are rated at 10 amps which is more than enough, even for a larger home.
Excessive load is more of a problem in commercial situations, particularly with large numbers of fluorescent lights. Higher capacity switch mechanisms are available for these applications.
You may see and hear a spark from your light switch if you move the mechanism too slowly. By operating the switch slowly you can hold the internal contacts just the right distance apart to cause an arc. Be firm and direct when operating a switch, don’t hold it in a half way position.
When in doubt, the best idea is to get the switch checked, and replaced if necessary.
If you have a dodgy switch that you are worried about, just give us a call during business hours and we’ll be happy to help you resolve the problem.
Phone Mance Electrical on 6331 4711.
