Monthly Archives: December 2018

What Causes Power Surges and How Can I Protect Myself?

When you hear the phrase “power surge”, most of us instantly think of storm clouds sending lightning bolts down toward our home. Or perhaps you think of power lines being zapped by millions of volts coming down from the heavens. Believe it or not, lightning is one of the least causes of power surges, even though its damage can be massive.

What is more likely to cause power surge damage inside our homes, is the use of devices that use a lot of power. Appliances such as air conditioners and refrigerators, for example, can cause our home’s power to fluctuate. Faulty wiring, that does not do its job of monitoring power, can cause this and other threats by allowing too much power to travel through our home’s electrical system.

Last blog we discussed what a surge protector is and the types available in stores. To better understand Surge Protector Ratings here is what they mean.

Clamping Voltage – typically 330V, 400V and 500V – this is the amount of volts that will pass through before directed to the ground. Lower is better.

Energy absorption/dissipation – 200/400/600 joules – states how many energy the surge protector can absorb before it fails. Higher is better.

Response time – how quickly will it work – look for less than one nanosecond.

Douthit Electrical is an expert at installing surge protection for your entire home. A whole house surge protector will protect your family from unwelcome surges from outside sources such as lightning. We can also discuss with you protection from smaller surges created inside your home with Point of Use Surge Protection.

We can counsel you on the right kind of protection, from not only the high voltage that can happen from destructive lightning and power line damage, but fluctuations that can occur because of faulty or outdated wiring to insure it can handle your appliance power needs.

Douthit Electrical has been providing Charlotte with quality electrical services since 1990. When you need help with your electrical service or installation, check out our money saving coupons and give us a call!


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What are Surge Protectors?

You see it advertised, you are told you need it, but have you wondered exactly what are Surge Protectors?

The average home expects to have 120 volts flowing through its system to deliver energy to its many outlets. If a surge of unwanted power is delivered, our wiring is not prepared for it, and neither are the many devices that we have plugged in.

When that surge of power is pushed onto appliances and delicate electronic devices, the result can be catastrophic. A surge protector power strip monitors that amount of voltage.

Types of Surge Protection

MOV (Metal Oxide Varistor) and Gas Tube (gas discharge arrestor). These are the most common types. If too much voltage travels into the power strip it diverts the excess amount to the ground wire, while allowing the correct amount to travel to items under its care. Under most circumstances, this will protect our plugged in items.

Built-in fuse – Some surge protectors have a built-in fuse. This acts as a second line of defense in case the extra voltage is not diverted in time. If the fuse is burned out, it eliminates the circuit and the flow of power is stopped.

You may have assumed that the power strips you see in your home are offering you surge protection. That may be not be the case. If you inspect them closely they should have a Underwriters Laboratories (UL) rating. If you do not see that, they are probably not offering you any protection, and are simply power strips. The minimum rating for surge protection is UL 1449.

Next time we will be discussing what causes power surges to endanger our homes and the option of whole home surge protection.

Douthit Electrical has been providing Charlotte with quality electrical services since 1990. When you need electrical service, check out our money saving coupons and give us a call!


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