Which of the following is a safety precaution when working with electricity?

Wearing appropriate protective gear is crucial for maintaining safety while working with electricity. Protective gear is designed to shield you from electrical hazards such as shock, burns, or arcs. It typically includes items like insulated gloves, safety glasses, and rubber-soled shoes that help mitigate the risk of electrical accidents. This precaution is particularly important given the potentially lethal consequences of electrical shock and the severity of injuries that can occur from electrical malfunctions.

In contrast, the other choices present actions that would increase the risk of accidents rather than prevent them. Turning on the power before commencing work could expose an individual to live wires or electrical currents, leading to dangerous situations. Using metal tools can also be hazardous since metals conduct electricity, which increases the risk of shock if they come into contact with live components. Ignoring grounding procedures is a severe safety violation, as proper grounding is essential to ensure that any electrical faults are safely redirected, preventing electrical shock or fire hazards.