What safety measures should be taken when using extension cords?

The correct choice emphasizes the importance of ensuring that extension cords are free of damage and not overloaded. This is crucial because damaged cords can expose wires, posing a significant risk of electrical shock or fire. Similarly, using an extension cord that is overloaded can lead to overheating, which may cause insulation to melt and create electrical hazards. By regularly checking cords for wear and damage and adhering to their rated capacity, users can greatly reduce the risks associated with their use.

The other options, while they may seem relevant, do not address the key safety considerations of using extension cords. For example, varying lengths of cords does not inherently increase safety and can lead to a mess of cords or tripping hazards. Using extension cords regardless of their rating is unsafe, as it can lead to situations where the cords cannot handle the electrical load. Lastly, limiting the use of extension cords to emergency situations is impractical; they are designed for regular use, but only when used safely and appropriately. Thus, confirming the condition and capacity of extension cords stands out as the most effective safety measure.