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Whole Home Surge Protection

 

Whole Home Surge Protection

 

Let’s talk whole house surge protection. What is it? What do you need to know? And why is it an important investment for the safety of your homebuyers and their devices.

Well, a good whole-house surge protection device protects your home. It allows in only the electricity your home needs and not the unruly over-voltages from the utility and it also protects your devices from any trouble that can occur from surges inside the house.

Whole-house surge protective devices are typically wired to the electric service box and located nearby to protect all the appliances and electrical systems in a home.

 

Did you know 80 percent of surges in a home we generate ourselves?

 

Here are 5 things you should know about whole-house surge protection:

1. Homes are in more need of whole house surge protection today than ever.

A lot has changed in the home over last few years and there are many more electronics, and even in lighting with LEDs, if you take an LED apart there’s a little circuit board there. Washers, dryers, appliances also have circuit boards today, so there’s a lot more today to be protected in the home from power surges—even the home’s lighting. There’s a lot of technology that we’re plugging into our houses.

2. Lightning isn’t the biggest danger to electronics and other systems in the home.

Most people think of surges as lightning, but 80 percent of surges are transient [short, intense bursts], and we generate them ourselves and they are internal to the home. Generators and motors like those in air conditioning units and appliances introduce small surges into a home’s electrical lines. It’s rare that one large surge will take out appliances and everything at one time, but those mini-surges over the years will add up, degrade the performance of electronics and cut short their useful lifespans.

Over voltages on the utility lines can also harm systems in the home, which is a prime reason for whole-house surge protection at the electrical service panel.

There is virtually no surge protection for a direct lighting strike. If you’re concerned about that, look into lighting rods.

3. Whole house surge protection protects other electronics.

You may ask, “If most of the harmful surges in a house come from machines like AC units and appliances, why bother with whole-house surge protection at the breaker panel?” The answer is that an appliance or system on a dedicated circuit, like an air conditioning unit, will send the surge back through the breaker panel, where it can be shunted to protect everything else in the home.

Back-up power generators can be a big culprit too. If they’re connected to the electrical service to provide power to many circuits in the home and turn on automatically when power goes out, they can send power surges through the electrical lines that a whole-house surge protection system can shunt.

It’s protecting the wiring the house, and every outlet is being protected.

4. Whole house surge protection should be layered.

If an appliance or device sends a surge through a circuit that’s shared among other devices and not dedicated, then those other outlets could be susceptible to a surge, which is why you don’t want it just at the electrical panel. Surge protection should be layered in the house to be at both at the electrical service to protect the whole home and at the point of use to protect sensitive electronics. Power conditioners with surge suppression capability, along with the ability to provide filtered power to audio/video equipment, are recommended for many home theater and home entertainment systems.

5. What to look for in whole house surge protection devices

 

Most homes with 240-volt service can be adequately protected with a whole home surge protector. Chances are a home is not going to see large spikes of 50kA to 100kA. Even nearby lightning strikes traveling over power lines will be dissipated by the time that surge reaches a house. A home will likely never see a surge over 10kA. However, a 10kA–rated device receiving a 10kA surge, for example, could use up its MOV surge-shunting capacity with that one surge, so something in the order of 80kA will ensure it lasts longer. Homes with subpanels should have added protection of about half the kA rating of the main unit. If there’s a lot of lightning in an area or if there’s a building using heavy machinery nearby, look for an 80kA rating.

 

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