Question

what determines the distance of the arc flash boundary to ensure worker safety in areas with a potential arc flash hazard?
the age of the equipment
the voltage level of the equipment
the number of workers in the vicinity
the color of the equipment

Explanation:

The voltage level of electrical equipment is a key factor in determining the arc - flash boundary. Higher voltage levels result in more intense arc - flashes and thus a greater required safety distance. The age of equipment, number of workers, and color of equipment do not directly determine the arc - flash boundary.

Answer:

B. The voltage level of the equipment