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What causes a power surge?

Power surges, (sometimes called voltage surges) are fast, temporary spikes in voltage within an electrical circuit. These surges, which are unavoidable, occur when something boosts the electrical charge at some point in the circuit. This boost can increase the current flowing into or within your home’s electrical wiring, affecting lighting, appliances and other electrical equipment in your home or business. Power surges are caused by many different factors, including lightning, faulty or damaged electric wiring or the sudden turning on and off of a high power electrical device like an air conditioner or large electric motor.
It is always a good idea to make sure that your appliances and expensive electronic equipment are protected by surge protection devices and proper grounding of your electrical system. There are many types and brands of surge protection equipment available on the market, including protectors for individual pieces of equipment, like a computer or television. Electricians can also install what is called “whole house” surge protection to provide protection for all electrical devices in your home. Please contact a licensed electrical contractor or qualified electronics dealer for more information on protecting your home. Oncor is not an expert on the topic of surge protection devices for consumer electrical equipment, nor does Oncor market, sell or provide surge protection equipment to customers.
- Rick W., Oncor Claims Expert

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