Question about Electrical Supplies
When any switch or circuit breaker is turned on, and there is a load present, there will be an arc as the current jumps the small gap between the contacts just before they actually touch. For example, if you could see inside a simple light switch you would see this arc as you either turn the switch on or turn it off. On the other hand, if there was no light bulb in the fixture, (this is the no-load situation) there would be no spark. The higher the voltage, the greater the gap that can be jumped. The larger the load (say more, high-watt light bulbs) the larger the spark. Most switches are designed to snap quickly through the position when the contacts are close together, so that the spark doesn't cause too much damage to the contacts.
Posted on Jan 14, 2013
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Posted on Jan 02, 2017
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