An electrician's plea: Don't plug these 7 appliances (including AC units) into extension cords
Extension cords are manufactured with a maximum capacity to handle electrical current, which is determined by the size or gauge of the wire used in the cord.
Don't plug these 7 appliances (including AC units) into extension cords - according to professionals
Extension cords are designed to run power to electronics, but they have limits based on wire gauge. Overloading them with high-demand appliances can lead to fires.