Protect your electronics – Power surges can cost you thousands
Sensitive electronics are showing up everywhere. Aside from places you’d expect them—like TVs and computers—they’re also in many appliances, even in newer furnaces and water heaters. All of that high-tech circuitry is vulnerable to power surges. The destruction can be gradual or sudden, but it’s always expensive; repairs often cost more than completely replacing the victim. But you can protect your electronics (and your wallet).
Two sources of surges
The most dangerous surges come from outside your home. These “external” surges are caused by lightning or an unstable power grid. Any device connected to coaxial cable (cable TV or a computer, for example) is also prone to lightning. Smaller “internal” surges are generated within your home by heavy power users like your fridge or furnace. These two types of surges require different solutions—and it’s smart to employ both.
Point-of-use surge suppressors
Small surge suppressors that protect one or several devices offer only fair protection against external surges. But they’re good for internal surges and many include protection for coaxial cable. Some suppressors are much better than others, so check the technical specifications (usually on the packaging). You don’t have to understand the details—just look for three things:
- Clamping voltage: You want 330 volts or less.
- Clamping speed: 5 nanoseconds or less.
- Energy dissipation: 500 joules or more.
The standard version
Most surge suppressors are similar to this one. You just plug the cord into a wall outlet and plug devices into the suppressor. Many include coaxial cable protection.
Built-in protection
Some outlets contain surge suppressors—much neater and more convenient than a bulky separate device. They lack coaxial cable protection, though.
For tight spaces
Low-profile surge suppressors are thin enough to fit behind most wall-mounted TVs. This model includes coaxial cable protection.
Whole-house surge suppressors
A whole-house suppressor protects every device in your home against external surges, and does that far better than a point-of-use suppressor. But a whole-house suppressor won’t stop internal surges. There are two types, and both require an electrician for installation. Expect a total cost of $400 to $600.
At the main panel
Most whole-house suppressors are mounted near the main electrical panel and require a connection within the panel.
At the meter
Some whole-house suppressors connect to the electrical meter, which is typically outside the house.
Does it need protection?
You can’t always tell if a unit has sensitive electronics inside just by looking at it. But here’s one clue: If it has a digital display, it definitely needs surge protection. The owner’s manual may also help. Many manufacturers recommend protection in the fine print.
Low-tech protection: Unplug it
Unplugging electronics during an electrical storm is a poor substitute for permanent surge protection, but it will prevent damage. Also unplug when there’s a power outage. As the power grid sputters back into service, it often generates surges. Leave a light switched on so you know when the power is restored.