What should be inspected on an extension cord before use?

The grounding prong and insulation are critical components to inspect on an extension cord before use. The grounding prong serves a vital safety purpose by providing a path for electrical current to safely exit in case of a fault, minimizing the risk of electrical shock. Inspecting the insulation is equally important; any damage, such as cuts or frays, can expose live wires and create serious safety hazards, including the risk of fire or electric shock. Ensuring both the grounding prong and insulation are intact helps guarantee that the extension cord can safely handle electrical loads without posing a risk to the user or the environment.

While the other options may seem relevant, they do not address immediate safety concerns. The color of the cord does not impact its functionality or safety, the length of the cord is more about usability than safety, and the manufacturer’s label, while it may provide useful information, does not directly confirm the condition of the cord necessary for safe operation.