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Overview In the electric industry, power surges are simply unavoidable. However, just like with home security systems, there are things we can do to protect us from surges, though never fully.
The Basics
The main task of a surge protector, also called a surge suppressor,
is to protect electronic devices from "power surges." A power
surge, or transient voltage, is an increase in voltage significantly
above the designated level in a flow of electricity. In typical
home/office wiring, the standard voltage is 120 volts; if
voltage rises above 120, the surge protector helps protect
your electronic device. Keep in mind:
- When the increase lasts three or more nanoseconds (billionths
of a second), it is a surge.
- When it's only 1-2 nanoseconds, it is a spike.
If the surge or spike is strong enough, it can cause significant damage on your device. Just like too much water pressure on a hose will cause it to burst, the same happens when too much electrical pressure runs through a wire, but in this case the wire heats up. Even if it doesn't immediately break your device, it can wear it down over time.
Causes Although many people think lightning causes most surges, in reality they're one of the less common causes. In fact, about 80% of all power surges are created by electronic equipment inside your home (air conditioners, refrigerators) because such high-powered devices use a lot of energy to turn on/off, and as mentioned earlier, can gradually be worn down over time. You might be surprised to know that only 15% or less come from unexpected lightning strikes.
Other sources of power surges include phone & cable lines, faulty home wiring, utility equipment problems, and downed power lines. The wires and transformers that bring power to your home or office is quite complex, having many possible failure points, and many potential errors that can start an uneven power flow. As mentioned, power surges are unavoidable, especially when you consider other unpredictable factors: weather, animals, autos hitting poles, etc.
Protection
You can buy many different surge protection models at local stores, but remember
a few important points:
- These devices are not lightning arrestors; they will not survive lightning strikes in close proximity to the premises.
- Be sure to consider how surges can enter the home through phone/cable lines; you should remember to protect these too.
- We realize this isn't always practical, but as always, the best and only sure protection is to isolate your device.
Whole House Surge Protection
We offer a popular device which offers whole house surge protection, but please be aware of what it can and cannot do.
These units are designed to help protect all the circuits in your house from a various range of voltage surges. These whole house surge protectors will curtail power surges coming from outside sources, but cannot suppress the high frequency of power surges that begin inside your home due to appliances, faulty wiring, and so on. Plus, as mentioned, other popular surge entry points are phone and cable TV lines, and you must protect against these too. This is where the many plug-in devices come in -- they can help your surge protection chances by offering yet another line of defense against them.
You will also note a green and red light on the device. Not surprisingly, the green light means it is functional and working properly; the red light indicates it is not operating and should be checked by us. (Hold your hand over the lights to see them as they are hard to see in sunlight.)
Surge protection is not unlike home security: you need protection at various points throughout your home (windows, doors, garage, etc.), yet at the same time, somehow, someone will always find a way to beat the system.
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