Power strips make life convenient, but they’re not designed to handle everything. Overloading one can damage appliances, trip breakers, or—worse—cause fires. I learned this lesson the hard way, and ever since, I’ve been much more careful about what I plug in. Here’s what you need to know, plus the list of devices you should always plug directly into a wall outlet.
First, Check the Power Rating
Every power strip comes with a maximum wattage capacity, usually written on the cord or label. To stay safe, add up the wattage of all devices you plan to plug in and make sure it doesn’t exceed the strip’s limit.
For example: if your strip supports up to 3500 W and you connect an oven (2500 W), a vacuum cleaner (800 W), and a kettle (250 W), that totals 3550 W—already over the limit. In cases like this, you must unplug one device to avoid a dangerous overload.
Devices That Should Never Be Plugged Into a Power Strip
1. Ovens
Ovens are among the most energy-hungry appliances. Always connect them directly to a dedicated wall outlet.
2. Refrigerators and Freezers
While they don’t use huge bursts of power, fridges and freezers run 24/7. That constant draw can overheat a power strip over time.
3. Washing Machines and Dryers
These appliances consume a lot of energy during each cycle. Plugging them into a strip increases the risk of overheating or short circuits.
4. Space Heaters
Small but mighty, auxiliary heaters pull heavy loads of electricity. Plug them only into a wall outlet—never into a strip.
5. Microwaves
Microwaves may seem harmless, but they use far more energy than you think. Keep them off extension cords.
6. Coffee Makers
A typical coffee machine consumes about 165 kWh per year. Always use a direct outlet connection for safety.
7. Toasters
Toasters can draw anywhere from 500 to 1000 W. For such a small device, that’s a lot—so avoid power strips.
8. Other Extension Cords
Chaining multiple power strips or extensions together (a practice called “daisy-chaining”) is a serious fire hazard.
9. Computers, TVs, and Internet Routers
These devices don’t use much power, but they are sensitive to electrical surges. If you must use a strip, make sure it’s a surge protector, not a standard one.
Final Thoughts
Power strips are handy, but they’re not built for heavy-duty appliances. While the risk of fire may seem low, prevention is always safer than dealing with the consequences. Plug high-consumption or sensitive devices directly into wall outlets, and use power strips only for lighter electronics.
