What is a prohibited zone in the context of power lines?

What is a prohibited zone in the context of power lines?

• A. That area above and below power lines that is outside the prohibited zone. Crane operations in this area should be avoided.
• B. An area where crane operations should be avoided
• C. The area beneath the crane's base
• D. The area used for crane fuel storage

Answer: (A)

A prohibited zone is the electrical safety boundary around overhead power lines. It’s a vertical region above and below the conductors that crane operations must not enter because contact or arcing could occur, leading to serious injury or death. The best answer points to this vertical area around the lines and emphasizes that crane work should be kept outside of it. Other areas described—such as spots beneath the crane base or fuel storage zones—relate to different hazards and do not define the electrical clearance boundary that protects against contact with power lines.