1. Air fryers
2. Microwaves
3. Other extension cords or power strips
4. Space heaters
5. Toasters and toaster ovens
6. Refrigerators
7. Air conditioning units
8. Printers
The big thing to keep in mind regarding extension cords is to never use them with any “appliances whatsoever.” He also says that your average home extension cords shouldn’t be used for anything above 15 amps (1,800 watts), regardless of where or how the device operates. When it comes to power strips and surge protectors, those should only be paired with electronics.