If you have ever had a TV go dark for no reason or watched your HVAC system stop cooling in the middle of a Georgia summer, a power surge may have been the culprit. Let me walk you through what causes power surges in your home, why they matter, and what you can do to protect the things you care about.
You know that moment when your lights flicker, your microwave clock resets, and everything seems fine five seconds later? That is likely a power surge doing its thing. Power surges are sudden spikes in voltage that exceed standard levels, and they happen far more often than most people realize. Surges can instantly damage electronic devices, or they can chip away at your appliances and electronics quietly over months and years.
Here in Metro Atlanta, we deal with frequent spring and summer thunderstorms that light up the sky from March through September. On top of that, our air conditioners run hard for months on end, cycling on and off all day long. Both of those factors mean your home faces a higher risk of surge activity than many parts of the country.
Frequent small surges can degrade appliances over time. Power surges often go unnoticed until devices fail. That means your refrigerator, your HVAC control board, your computer, and your smart home gadgets could all be slowly losing lifespan without you knowing it.
A power surge is a sudden jump in voltage above the typical voltage levels your home is designed for. Standard U.S. household electrical power runs at about 120 volts. Your home's electrical system, electrical outlets, and power strips are all built to handle that range. When voltage spikes to several hundred volts or more, even for just a few microseconds, that excess voltage stresses wiring insulation and the delicate components inside your connected electrical devices.
Surges can be internal (starting inside the house) or external (traveling in through the power lines or power grid). Repeated minor surges, the kind you never even notice, quietly degrade electronic devices over months or years. Think of it as slow, invisible wear and tear on everything plugged into your walls.
Many homeowners assume that power surges caused by lightning are the main threat. In reality, internal power surges account for the majority of surge events. High-powered appliances can cause internal power surges when cycling on or off. Every time your air conditioner compressor kicks in, your refrigerator motor starts up, or your electric dryer begins a cycle, there is a brief inrush of electrical current that creates a small voltage spike on your home's wiring.
Power surges happen dozens of times a day in a typical home, and most go completely unnoticed. Over time, though, they take a toll on sensitive electronics and appliance control boards.
An electrical overload occurs when too much power is drawn from a circuit. Plugging too many devices into the same circuit, especially through cheap power strips or by overusing extension cords, pushes the circuit beyond what it was designed to handle. Power surges can follow electrical overloads due to excess current, and too many devices on one circuit can cause voltage spikes that ripple out to other parts of your home's electrical system.
Older Metro Atlanta homes built in the 1970s through 1990s often have fewer circuits than a modern household needs. That means you might be running a window AC unit, a space heater, and a hair dryer on the same socket without even realizing it. If you notice circuit breakers frequently tripping, that is a sign your circuits are being pushed too hard.
Here are some practical steps to reduce overload:
Faulty wiring can cause power surges in homes and is a serious fire hazard. When connections are loose, insulation is damaged, or wiring is corroded, the result is poor electrical resistance that leads to erratic voltage and arcing. Damaged wiring can lead to sudden voltage spikes that stress everything on that single circuit.
If you suspect faulty wiring, look for these warning signs:
Older homes often have outdated wiring that increases surge risk, especially homes with aluminum wiring or ungrounded systems. Older homes may have wiring that struggles with modern electrical loads like smart home setups, EV chargers, and multiple air conditioners. DIY wiring and unpermitted additions can leave exposed electrical wires or loose connections that spark and create voltage spikes. Faulty wiring can create fire hazards during power surges, so any suspected issue should be checked by a licensed electrician, especially if your home was built before 1990.
While internal surges are more frequent, many of the most destructive power surges occur from outside your home. External surges travel through power lines, cable lines, and phone lines into your connected electrical devices immediately. Downed power lines from storms or fallen tree limbs can trigger widespread power surges across entire neighborhoods.
Lightning strikes can cause massive voltage spikes. A single bolt of lightning can carry millions of volts, while your home's electrical system is built for about 120 volts. Lightning can cause power surges over 1,000 volts, and lightning strikes can send thousands of volts into homes through the power grid. Surges can occur even if lightning strikes a mile away, because the electromagnetic energy travels along utility lines and into your neighborhood.
Severe storms increase the risk of lightning-related surges, and frequent lightning strikes on utility poles can lead to external surges that affect every home on that circuit. A direct strike on or near your home can overwhelm small plug-in surge protectors and destroy HVAC control boards, TVs, networking gear, gaming systems, and smart devices in a single event. That kind of massive spike can wreak havoc on everything plugged in.
Metro Atlanta sees peak thunderstorm activity from March through September. During intense lightning storms, unplugging devices during storms prevents surge damage. For everything you cannot unplug, properly installed whole home surge protection is your best line of defense.
Power surges can occur due to power grid disruptions that have nothing to do with weather. Your utility company performs switching operations, bringing circuits on and offline or rerouting the power supply during maintenance. Utility switching can create unpredictable power surges during these operations. Equipment failures on the utility side, like blown transformers or damaged substations, may send irregular voltage onto residential lines. These are power grid issues that are mostly outside your control.
Power surges can occur after power outages when electricity is restored. That initial rush of electrical power back into the system creates a sudden jump in voltage that can damage plugged in appliances and sensitive equipment throughout your home. If you experience frequent outages or flickers, consider whole home surge protection and an electrical inspection.
Many surges are invisible, but there are clues that surge activity is affecting your home. Watch for these indicators:
If you notice more than one of these symptoms in a short period, especially after a storm or a power outage, it is time to schedule a professional inspection. Homeowners in Dallas, Loganville, and nearby communities should not ignore these signs.
The good news is that you can take practical steps to prevent or reduce power surge damage. Surge protectors block excess voltage from reaching your appliances and electronics, and the best approach uses layered protection.
A whole home surge protector is hardwired into your main electrical panel, where it monitors incoming voltage and diverts any overwhelmingly excessive current safely to ground. Whole home surge protectors protect every circuit in the house, including built-in systems like your HVAC system, refrigerator, and water heater. This is the primary defense against both internal and external surges.
A licensed electrician can help you determine how much surge protection your home needs based on factors like maximum voltage ratings, surge current capacity, and joule capacity. Professional installation is required for code compliance, and improper DIY installation can create new hazards. Ragsdale can recommend, supply, and install whole home surge protection for homeowners throughout Metro Atlanta.
Not all power strips provide surge protection. A basic power strip is just an extension of your outlet. A true surge protector has a joule rating that tells you how much energy it can absorb before it wears out. Many surge protectors also have indicator lights showing whether protection is still active.
Point-of-use surge protectors are recommended for sensitive electronics like computers, home theater systems, and networking equipment. For these valuable devices, look for a joule rating of at least 1,000 to 2,000 joules. Plug-in surge protectors typically last 2 to 5 years, and in storm-heavy areas like Metro Atlanta, replacing them more frequently is smart. Plug-in protection works best when layered with whole home surge protection at the panel.
Ragsdale is a full-service home comfort contractor serving Dallas, Loganville, and the greater Metro Atlanta area. Our licensed electricians have years of experience diagnosing power surges, overloaded circuits, and outdated wiring in Georgia homes. We handle electrical inspections, panel upgrades, whole home surge protector installation, and dedicated circuit additions for large appliances.
If you suspect power surges are affecting your lights, outlets, or electronic devices, give us a call and let us take a look.
Absolutely. Modern HVAC systems rely on sensitive control boards and electronic components that are especially vulnerable to voltage spikes. A significant power surge from a lightning event or major grid issue can destroy a control board in a single event. You might notice an outdoor unit that will not start, a blower that runs but produces no cooling, or error codes on your thermostat. Whole home surge protection and a dedicated circuit for your HVAC equipment are the best preventive measures.
Walk through your home and check for tripped breakers, a burning smell, or outlets that feel warm. Unplug any connected electrical devices that suddenly turned off or show visible damage. You can try resetting tripped breakers once, but if a breaker trips again immediately or will not reset, stop and call an electrician. If several appliances or circuits were affected, especially after a strong storm, schedule a professional inspection.
Many policies cover surge damage from external events like lightning strikes or utility company issues, but coverage for damage caused by internal problems like overloaded circuits or faulty wiring varies. Review your policy or speak with your insurance agent to understand your coverage. Document any damaged sensitive electronics or appliances with photos and save receipts. Even with insurance, prevention through surge protection is usually far less expensive than filing a claim after a major event.
Plug-in surge strips generally protect well for about 2 to 5 years, depending on how many surges they absorb and local storm activity. Some have indicator lights that tell you when protection has worn out. In storm-prone parts of Metro Atlanta, consider replacing them after any noticeable electrical surge or lightning event. Whole home surge protectors usually last longer but should be inspected during regular electrical maintenance.
It is generally safe to reset a clearly tripped breaker once, as long as there is no burning smell coming from the panel, no visible damage, and no buzzing sound. Turn off or unplug major appliances on that circuit before resetting to reduce the load. If the breaker trips again right away, will not reset, or feels hot, stop and call a licensed electrician. Ragsdale can provide same-day electrical service in many Metro Atlanta communities if a surge has affected your panel or circuits.
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