NCCER Mobile Crane Practice Exam 2025 - Free Mobile Crane Practice Questions and Study Guide

Question: 1 / 400

What is the minimum safe working distance from power lines under 50kV for cranes?

5 feet

10 feet

The minimum safe working distance from power lines under 50kV for cranes is indeed 10 feet. This distance is critical for preventing electrical hazards, as power lines carry high voltage that can pose serious risks to equipment operators and workers on-site. Maintaining a distance of at least 10 feet helps ensure that there is enough buffer to avoid accidental contact with the power lines, particularly during crane operations, where movement can be unpredictable.

The National Electrical Safety Code (NESC) sets guidelines on safe working distances from overhead power lines, recognizing that even an unintentional swing of a boom or load can create a dangerous situation if proper distances are not adhered to. By following this regulation and maintaining the specified distance, crane operators help enhance safety on the job site and reduce the risk of electrical shocks or potential fatalities.

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20 feet

15 feet

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