When must employees be protected against electric shock from electric power circuits?

The correct answer emphasizes that no employer is allowed to permit an employee to work in proximity to any part of an electric power circuit without proper protection. This requirement is rooted in the need to prevent electrical accidents and ensure the safety and health of employees in the workplace, especially in environments where they may encounter energized circuits.

Electric shock can occur in various situations, not just when operating electrical equipment or working near specific installations. It highlights the necessity of universal safety protocols that apply any time employees could potentially come into contact with electrical hazards, thereby addressing a broader scope of safety than the other options.

By mandating protection against electric shock in all situations that present a risk of working near electric power circuits, this perspective fosters a culture of safety and minimizes the likelihood of injuries. This reflects OSHA's commitment to ensuring that all workers are safeguarded against electrical hazards in a comprehensive and proactive manner.