What type of potential could cause injury to someone standing near a ground attached to a crane in contact with power lines?

What type of potential could cause injury to someone standing near a ground attached to a crane in contact with power lines?

• A. Ground potential
• B. Step potential
• C. Touch potential
• D. Electrical shock potential

Answer: (B)

Step potential refers to the difference in voltage that exists between two points on the ground separated by a distance that a person might span when standing or walking. When a crane comes into contact with power lines, the surrounding ground may become energized. If a person standing near the crane is on the ground and experiences a voltage difference between their feet, they can be subject to a step potential. This scenario is particularly dangerous because as the electric current spreads out from the point of contact, the voltage decreases with distance. If a person were to stand with their feet separated by a few feet, their body could create a path for that electric current to flow from one foot to the other, potentially resulting in severe injuries or even fatalities. Therefore, it is crucial for operators and individuals nearby to maintain a safe distance and be aware of the risks associated with cranes working near power lines.

Step potential refers to the difference in voltage that exists between two points on the ground separated by a distance that a person might span when standing or walking. When a crane comes into contact with power lines, the surrounding ground may become energized. If a person standing near the crane is on the ground and experiences a voltage difference between their feet, they can be subject to a step potential.

This scenario is particularly dangerous because as the electric current spreads out from the point of contact, the voltage decreases with distance. If a person were to stand with their feet separated by a few feet, their body could create a path for that electric current to flow from one foot to the other, potentially resulting in severe injuries or even fatalities. Therefore, it is crucial for operators and individuals nearby to maintain a safe distance and be aware of the risks associated with cranes working near power lines.