Florida is the lightning capital of the country, and even a storm several miles away can send a spike of electricity through your home’s wiring. Power surges don’t have to be dramatic to cause harm. Over time, small surges wear down electronics and appliances, and a big one can destroy a television, a computer, or an air conditioner control board in an instant. The good news is that protection is affordable and mostly simple. Here’s how to build a layered defense, from the electrical panel to the power strip behind your desk.
Understand Where Power Surges Come From
Lightning is the most dramatic cause, but most surges start inside the home. Large appliances such as air conditioners, refrigerators, and pumps create small spikes every time they cycle on and off. Utility switching, downed lines, and transformer problems can also send extra voltage into the house. Surges don’t just travel on power lines, either. They can arrive through cable, satellite, phone, and ethernet connections, which is why a television can be damaged even when it’s plugged into a protected outlet. Even the moment power returns after an outage can create a spike, which is why unplugging sensitive items during outages is wise. Knowing that surges come from many directions explains why one layer of protection isn’t enough.
Start With Whole-House Surge Protection
A whole-house surge protector is installed at the electrical panel by a licensed electrician, and it’s the first line of defense against power surges. It diverts excess voltage before it spreads through the home’s wiring, which protects hardwired items such as the air conditioner, water heater, and lighting, along with everything plugged into outlets. Look for a unit with a clear indicator light that shows it’s working, and ask the electrician about the rating. These devices wear out over time, especially after a major surge, so check the indicator regularly and have it replaced when it signals a problem. Ask the electrician to confirm that your home is properly grounded, since surge protection relies on a good ground to work.
Use Surge Protectors Properly to Guard Against Power Surges
A basic power strip only adds outlets. A true surge protector has a joule rating, usually at least 1,000 for everyday electronics, and a safety listing printed on the packaging. Plug televisions, computers, game consoles, and routers into protectors, and run cable and phone lines through them if they have those ports. Never plug one strip into another, and don’t overload a strip with heaters or appliances. Surge protectors also wear out, so replace them every few years or right after a significant event. Large appliances like refrigerators generally should be plugged directly into a wall outlet unless the protector is rated for them. Look for a clamping voltage listed on the package, and choose a model with an indicator light that shows when its protection has worn out.
Know When to Unplug and What to Check
The only guaranteed protection from power surges during a nearby strike is to unplug sensitive electronics, including their cable and network connections, when a thunderstorm is overhead. Unplug valuable equipment before you leave on a long trip, too, which matters for many seasonal residents. After a surge or a close lightning strike, check for tripped breakers, burning smells, or devices that behave strangely. Flickering lights, warm outlets, or repeated device failures can signal wiring or grounding problems that deserve an electrician’s attention. Keep receipts and photos of major electronics in case you need to file a claim. For computers and routers, a battery backup with surge protection is a smart choice, giving you time to save your work and shut down safely when the power flickers.
Frequently Asked Questions (FAQs)
Does a surge protector really protect against lightning?
It reduces the risk from nearby strikes and everyday spikes, but a direct hit can overwhelm any device. Unplugging equipment during severe storms is the only guaranteed protection.
How do I know if my surge protector still works?
Check the indicator light, which usually shows that the protection circuit is active. If the light is off or the unit has been through a major surge, replace it. Plan to swap protectors every few years.
Are whole-house surge protectors worth it?
They cost far less than replacing appliances and electronics, and they protect hardwired equipment you can’t easily plug into a strip.
Does homeowner’s insurance cover surge damage?
Many policies cover lightning damage, but terms and deductibles vary. Read your policy, ask your agent, and keep receipts and photos of your electronics to make any claim easier.
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