Which safety measure is crucial when working near electrical equipment?

Using rubber gloves and shoes is crucial when working near electrical equipment because these materials provide effective insulation, protecting individuals from electric shock. Rubber is a non-conductive material, which means it does not allow electricity to flow through it. When worn as gloves or shoes, they help to minimize the risk of direct contact with live electrical sources, which could result in serious injury or even fatality. This is particularly important in healthcare settings where exposure to electrical hazards can occur through medical equipment or during maintenance activities.

The other options presented may pose risks rather than contributing to safety. Polyester clothing, for example, can be a fire hazard if ignited, as it may melt onto the skin. Staying away from metal objects may not be a comprehensive safety strategy, as it's impossible to eliminate all metal tools and equipment from a clinical environment. Furthermore, having food and drinks nearby can create a distraction and increase the likelihood of accidents, particularly in settings where electrical equipment is in use. Therefore, the most effective safety measure in this context is indeed the use of rubber gloves and shoes.