Surge Protection for Electronics

No matter how excellent your surge protection is if lightning strikes your house, all bets are off.

No matter how excellent your surge protection is if lightning strikes your house, all bets are off.

As electricians, we see society moving toward more electronic devices every day. These items are sensitive to many external factors. If you own delicate electronic equipment such as a computer or television, you probably own a surge protector. Most surge protector designs serve a distinct function, which is allowing you to plug various components into a single power outlet. But, there is much more to it than that.

Why electronics need surge protection

Surge protectors guard electronics from surges in electrical power. A power surge, which is also called transient voltage, is an increase in energy that’s above the average level of electricity flow. In typical office and household wiring in the US, the standard voltage is 120V. If it’s above 120V, that’s a surge, and surge protectors help prevent that problem from destroying delicate electronics.

How does voltage work?

It’s easier to know something about voltage before trying to understand more about surge protection. It’s a measure of the difference in the electric potential energy. An electric current travels from point to point, and there’s a higher electrical potential energy on the originating wire’s end than on its other (outlet) end. It’s the same kind of principle which urges water under pressure to flow out of the hose: a higher demand on the hose’s end pushes water toward a place of lower pressure. You may think of the voltage as the measure of the electric force.

How surges cause damage

Once the surge is high enough, it may inflict massive damage on electronics and even wiring. The effect is similar to applying water pressure to the hose. If there is too much water pressure, the hose will burst. In the same way, when too much electricity runs through a wire, it heats up like a filament in the light bulb and starts to burn. Even though increased voltage may not break your electronic immediately, it can put extra strain on it, and weaken components.

How a surge protector diverts electrical surges

A typical surge protector passes the current along from an outlet to several electronic and electrical devices plugged into the power strip. Once the voltage from an outlet surges, the surge protectors divert extra electricity into the grounding wire of an outlet. In a basic surge protector, there’s a component known as MOV or metal oxide varistor, which diverts excess voltage and prevents damage to the electronics.

For this reason, using a surge protector for delicate electronics is well worth the money. If a homeowner finds they have more electronics and a higher vested interest in protecting them, or the home is located in an area with frequent power surges, a whole house surge protector can protect electronics and also the wiring of a home.

When a home has a large appliance, such as an HVAC, which causes surges inside the home wiring system, these are also a threat to electronics. However, a whole house surge protector can divest the surge before it is allowed to ramp the voltage into other circuits.

Also, you can get surge protectors specially designed for phone and cable lines. Just as everyone’s homes and electronic devices are different, so their need for surge protection will be different. But, ultimately, the more ‘layers’ of surge protection between a surge and your devices, the less likely they are to become damaged or destroyed.

If you have concerns about your delicate electronics and power surges in your home or business, it may be time to talk to your electrician about whole-house surge protection.

A.B.T. Electric is a licensed residential and commercial electrical contractor in Anthem, Az. We are committed to continuing expertise, safety, and customer satisfaction.