What is required to be on the surface while work is conducted in a manhole with energized electric equipment?

Having an employee with first aid and CPR training present while work is conducted in a manhole with energized electric equipment is crucial for safety. In scenarios where electrical work is being performed, there are inherent risks involved, including the possibility of electrical shock, burns, or other medical emergencies. The presence of a trained first responder ensures that immediate medical assistance can be provided if an emergency occurs, potentially saving lives and minimizing injuries.

It's important to recognize that the other options, though valuable in certain contexts, do not address the critical need for immediate medical readiness in these potentially hazardous situations. A supervisor with a toolbox may be responsible for oversight and tools but does not cover the immediate health and safety aspect. An extra pair of gloves could help protect against electrical hazards but wouldn't assist in an emergency response. Similarly, while a fire extinguisher is an essential safety device, it does not provide the medical preparedness required in situations involving energized equipment. Thus, the presence of an employee trained in first aid and CPR is the most appropriate and necessary choice for safety in this environment.