Extension cords and power strips are commonly used for home and office electronics. However, during winter, some appliances pose significant safety risks if plugged into these cords.
While extension cords can safely power low-demand electronics positioned far from wall outlets, they are not designed for high-wattage appliances. Understanding this distinction is crucial to avoid overheating, fires, or appliance malfunction.
Why Certain Appliances Shouldn’t Be Plugged into Extension Cords
Extension cords are manufactured to handle specific amounts of electrical current, determined by their wire gauge. For example:
- 16-gauge cords: Handle up to 13 amps.
- 14-gauge cords: Handle up to 15 amps or 1,800 watts—the same capacity as a standard US wall outlet.
When an appliance demands more power than the extension cord can manage, it overloads the cord, potentially causing insulation to melt, exposing live wires, or even sparking fires.
Any appliance requiring more than 1,800 watts should always be connected to a dedicated wall outlet. Below are seven appliances you must never plug into an extension cord.
1. Refrigerators
While refrigerators consume less wattage compared to other kitchen appliances, they operate continuously and demand a substantial power supply. Using an extension cord can lead to voltage drops, causing the fridge to malfunction or overheat, which may damage the appliance over time.
2. Toasters and Toaster Ovens
Despite their compact size, toasters draw significant power, especially when heating elements are active. Toaster ovens, which require 1,200 to 1,400 watts, pose an even higher risk of overheating an extension cord. Always plug these directly into a wall outlet to avoid electrical hazards.
3. Air Fryers
Air fryers are a popular kitchen gadget, but their high wattage (up to 2,000 watts for larger models) makes them unsafe for extension cords. The heat generated during operation can cause overheating or fires when plugged into an insufficient power source. Always connect your air fryer directly to a wall outlet for safe use.
4. Microwaves
Microwaves, whether compact or standard-sized, demand considerable power. While smaller microwaves use 600 to 800 watts, larger ones consume up to 1,000 watts. Plugging them into an extension cord can cause overheating or even trip circuit breakers. Instead, connect them directly to a ground fault circuit interrupter (GFCI) outlet in the kitchen.
5. Air Conditioning Units (ACs)
Portable and window AC units require substantial energy—typically 6,500 BTUs or about 1,905 watts for cooling a 150-square-foot room. Extension cords are incapable of handling this draw, leading to potential overheating and fire hazards. Use a wall outlet and verify your unit’s power requirements beforehand.
6. Space Heaters
Space heaters are notorious for fire risks, especially when connected to extension cords. With most units generating 5,120 BTUs per hour, they easily exceed the capacity of standard extension cords, leading to melted plugs and fire hazards. Always plug space heaters directly into a dedicated wall outlet.
7. Extension Cords (Daisy-Chained)
Using one extension cord to connect another—commonly called “daisy-chaining”—is highly dangerous. This practice can lead to circuit overload, causing overheating and fires. Extension cords are not designed to distribute power in this manner and should only be used individually.
The Bottom Line
Extension cords are not a one-size-fits-all solution for powering household appliances. Devices that draw more than 1,800 watts or require more than 15 amps must always be plugged into dedicated wall outlets. By following these guidelines, you can ensure your safety and prevent electrical hazards in your home.
