What should you avoid when using extension cords?

Using extension cords that are not rated for the equipment is crucial to avoid because such cords may not be capable of handling the necessary voltage or current required by your devices. Extension cords come with specific ratings that indicate their maximum load capacity and safety standards. When a cord is under-rated for your equipment, it can lead to overheating, which poses a risk of electrical fires or damage to both the cord and the connected devices.

The other options focus on safe practices. Using extension cords in dry locations minimizes the risk of electric shock or damage. Using cords that are appropriately rated ensures safe operation, and using cords in pairs for devices can lead to safety concerns regarding overstressing the outlets or causing circuit overloads. Thus, it's essential to always match the cord rating with the equipment requirements for safe use.