Which of the following describes a proper electrical safety precaution?

The correct choice emphasizes the importance of inspecting a tool's cord for any signs of damage or frays before use. This precaution is fundamental to electrical safety, as a frayed cord can expose live wires, leading to electrical shocks or fires. Regularly checking tools helps to ensure they are in safe working condition and minimizes the risk of accidents in the workplace.

The other options disregard critical safety practices. Using tools with frayed cords exposes users to significant hazards. Operating tools in wet areas increases the risk of electrical shock because water is a conductive medium. Ignoring unusual noises from electrical equipment can indicate underlying issues, such as short circuits or other malfunctions, which can be dangerous if not addressed. Therefore, taking proactive measures like inspecting cords is essential for maintaining a safe working environment.