Electrical equipment in commercial and industrial occupancies that may require servicing while energized must be marked for what hazard?

The requirement for marking electrical equipment that may require servicing while energized is primarily to address the risks associated with electric arc flash hazards. Electric arc flashes can produce intense energy that can cause severe injuries or fatalities. When working on or near energized equipment, it is crucial for workers to be aware of the potential for arc flash incidents, which may occur due to equipment failures, improper handling, or maintenance procedures.

Marking the equipment helps create awareness and promotes safety practices, ensuring that personnel take necessary precautions like wearing appropriate personal protective equipment (PPE) when performing maintenance tasks. This marking is a critical aspect of workplace safety regulations, particularly in commercial and industrial settings where the likelihood of working on energized circuits is higher.

The other options, while related to potential hazards in an electrical environment, do not specifically address the unique risks posed by arc flashes, which can result in life-altering injuries or even death due to the extreme temperatures and pressures generated during such an event.