What is a power surge?
A power surge occurs when the line voltage goes higher than nominal and stays there longer than ten milliseconds. This can damage any of your appliances and all of your electronics. Surges occur when devices with motors such as refrigerators and hair dryers.
Roughly 40% of the problem is generated outside the home or office, but 60% of all electrical surges are generated with in the home.
Some ways Surges are caused include: