Things You Should Never Plug Into a Power Strip: 9 Devices That Could Put Your Home at Risk

Using a power strip incorrectly could increase the risk of overheating and fire.

Power strips are convenient for expanding the number of available outlets, but they are not designed to handle every household appliance. Many high-power devices draw more electricity than a standard power strip can safely support, increasing the risk of overheating, damaged wiring, or even electrical fires.

Understanding which appliances should be plugged directly into a wall outlet can help protect both your home and your family.

1. Major Household Appliances

Large appliances such as refrigerators, washing machines, dryers, dishwashers, and air conditioners require substantial electrical power. Plugging them into a power strip can overload the strip's internal wiring, especially if multiple devices are connected simultaneously.

These appliances should always be connected directly to a properly grounded wall outlet.

2. Space Heaters

Portable electric heaters are among the most common causes of household electrical fires during colder months.

Because they consume a large amount of electricity, manufacturers generally recommend plugging them directly into a wall outlet rather than into a power strip or extension cord.

3. High-Wattage Kitchen Appliances

Appliances including:

• Electric kettles
• Air fryers
• Coffee makers
• Toasters
• Microwave ovens
• Electric grills

all generate significant power demands. Running them through a power strip may increase heat buildup and shorten the life of both the appliance and the strip.

4. Multiple Power Strips Connected Together

"Daisy-chaining" power strips—plugging one strip into another—is strongly discouraged.

Doing so increases electrical resistance and can overload a single wall outlet beyond its intended capacity, creating a serious fire hazard.

5. Air Conditioners

Window and portable air conditioners often require dedicated electrical circuits because of their high startup current.

Using a power strip instead of a wall outlet may lead to overheating or repeated circuit breaker trips.

6. Laser Printers

Unlike ordinary printers, laser printers generate short bursts of very high power while heating the fuser unit.

For this reason, they should be connected directly to a wall outlet whenever possible.

7. Aquariums

Fish tanks equipped with heaters, filters, and lighting systems may draw continuous electrical loads.

A dedicated outlet helps ensure reliable operation while reducing unnecessary stress on power strips.

8. Medical Equipment

Devices such as oxygen concentrators, CPAP machines, and other essential medical equipment should never rely on overloaded power strips.

A direct wall connection helps reduce the chance of accidental power interruptions.

9. Any Device That Exceeds the Power Strip's Rating

Every power strip has a maximum electrical capacity. Exceeding that limit can cause excessive heat, damaged insulation, or electrical failure.

Before connecting multiple devices, always check the strip's rated wattage or amperage and avoid exceeding its specifications.

Tips for Using Power Strips Safely

• Never plug one power strip into another.
• Avoid covering power strips with rugs or furniture.
• Replace damaged or discolored strips immediately.
• Unplug devices that are not in use when appropriate.
• Use surge protectors for sensitive electronics, but remember that surge protection does not increase electrical capacity.
• Inspect cords regularly for signs of wear, melting, or fraying.

Final Thoughts

Power strips are useful for powering low-energy electronics such as computers, televisions, phone chargers, and desk lamps. However, high-wattage appliances should almost always be connected directly to a wall outlet. Following these simple electrical safety practices can reduce the risk of overheating, equipment damage, and household fires.