A whole-house surge protector is installed at the electrical panel or service equipment and helps reduce surges entering every circuit, while a power strip simply adds outlets at one location and may provide no surge protection at all. Plug-in surge protectors, which look like power strips but include surge protection, cover only the devices plugged into them.
Knowing the differences helps you choose the right mix of protection.
Where Each Device Is Installed
A whole-house surge protective device is mounted at or in the main panel and connected by an electrician. It works at the point where power enters the home’s wiring, so it can help reduce surges before they spread to outlets, appliances and hardwired equipment.
Because it protects at the source, it also covers hardwired equipment that cannot plug into a surge strip, such as HVAC controls and built-in appliances.
A power strip or plug-in surge protector plugs into a wall outlet. It only affects the equipment connected to it, and it cannot help hardwired appliances such as furnaces, water heaters, ranges or HVAC equipment.
Not Every Power Strip Is a Surge Protector
Many power strips are just extension outlets with a switch and a breaker. They provide convenience, not surge protection. A plug-in surge protector should be labeled as such and include a surge protection rating from a recognized testing standard on the packaging or device. Look for surge protection details on the label before relying on any plug-in device.
Plug-in surge protectors can wear out after absorbing surges. Many include an indicator light that shows whether protection is still active, and older units may need replacing even if the outlets still work.
Protection Scope and Limitations
Whole-house devices help with surges that come in through the electrical service, while plug-in protectors handle what remains at sensitive equipment, including smaller surges created inside the home. Neither device can stop every surge or protect against a direct lightning strike.
A whole-house device does not make point-of-use protection unnecessary in every situation. Computers, TVs, home office equipment and networking gear still benefit from good plug-in protectors.
Building Layered Protection
The most effective approach uses both. A whole-house surge protector at the panel, combined with quality plug-in surge protectors for sensitive electronics, gives equipment more than one layer of protection. Avoid plugging power strips into each other or overloading them.
Installing a whole-house device involves working at the panel and should be done by a qualified electrician. Homes across Utah have many different panel types, so device compatibility needs to be checked first.
If you want to add protection at the panel of your Salt Lake City home, our whole-house surge protection service can recommend a compatible device and explain how it fits with your plug-in protectors.