What safety equipment is essential when testing electrical systems?

Safety glasses are essential when testing electrical systems because they protect the eyes from potential hazards such as flying debris, sparks, and chemical splashes that may occur during testing or equipment failure. In electrical work, there is a risk of arcs, explosions, or other reactions that could project particles at high velocity, making it critical to shield the eyes from these threats.

While gloves, earmuffs, and hard hats can also be important safety equipment in certain situations, they do not address the specific risks associated with electrical testing as directly as safety glasses do. Gloves may be effective for preventing shock and providing grip, earmuffs are primarily for hearing protection in noisy environments, and hard hats protect against falling objects or head impacts, but they do not shield the eyes from potential hazards present during electrical work.