If there is immediate danger of fire or explosion after power line contact, what is the dismount method?

If there is immediate danger of fire or explosion after power line contact, what is the dismount method?

• A. Jump off the crane at its lowest point by jumping off and landing with your feet together and not touching the crane again.
• B. Shuffle or hop away from the crane taking very small steps.
• C. Remain in the cab and wait for instructions.
• D. Dismount the crane at the highest point by climbing down slowly.

Answer: (A)

When a crane touches a live power line, the crane can be energized and an electrical arc or fire could occur. The safest way to escape is to disconnect from the energized structure as quickly as possible while minimizing the path electricity can take through your body. Dismount from the lowest point of the crane by jumping down, landing with your feet together, and then moving away without touching the crane again. Jumping from the lowest point reduces the distance you’re exposed to the energized surface and helps you break contact quickly. Keeping your feet together helps keep both feet at the same electrical potential, which minimizes the current that can pass up one leg and across your body. Not touching the crane after you land prevents you from providing a new ground path for the current. Staying inside the cab or climbing down slowly from a higher point would keep you connected to the live structure longer and increase the risk of electrocution or ignition. Similarly, shuffling or hopping away while still holding onto the crane would maintain a potential path for the current. The emphasis here is to exit in a way that stops the electrical connection as soon as possible and get clear of the area.

When a crane touches a live power line, the crane can be energized and an electrical arc or fire could occur. The safest way to escape is to disconnect from the energized structure as quickly as possible while minimizing the path electricity can take through your body.

Dismount from the lowest point of the crane by jumping down, landing with your feet together, and then moving away without touching the crane again. Jumping from the lowest point reduces the distance you’re exposed to the energized surface and helps you break contact quickly. Keeping your feet together helps keep both feet at the same electrical potential, which minimizes the current that can pass up one leg and across your body. Not touching the crane after you land prevents you from providing a new ground path for the current.

Staying inside the cab or climbing down slowly from a higher point would keep you connected to the live structure longer and increase the risk of electrocution or ignition. Similarly, shuffling or hopping away while still holding onto the crane would maintain a potential path for the current. The emphasis here is to exit in a way that stops the electrical connection as soon as possible and get clear of the area.