Which of the following actions is NOT recommended to prevent electric shock?

Using metal tools in a wet area is not recommended to prevent electric shock due to the high conductivity of metal, which can easily conduct electricity. When metal tools come into contact with water, they create an increased risk of electric shock for anyone using them, as water is a conductor of electricity. This scenario poses an immediate danger, as the metal can deliver an electrical current directly to the user, leading to serious injury or fatality.

In contrast, the recommended actions such as checking extensions and power tools, confirming that the area is de-energized, and using a Ground Fault Circuit Interrupter (GFCI) all enhance safety measures. Checking tools ensures they are in good working condition and free from wear or damage that could lead to shock. Confirming the area is de-energized eliminates the risk of accidental electrocution during work. GFCIs are designed to interrupt the flow of electricity if a ground fault is detected, providing an added layer of protection when working in potentially hazardous environments.