Massachusetts Hoisting License Practice Test

What is the minimum distance a machine should maintain from an overhead power line?

1. 5 feet for any voltage

2. 10 feet for voltages up to 50,000 volts, plus 1 foot for each insulating ring

3. 20 feet regardless of voltage

4. 3 feet unless otherwise specified

The correct answer is: 10 feet for voltages up to 50,000 volts, plus 1 foot for each insulating ring

The minimum distance a machine should maintain from an overhead power line is determined by the voltage of the power line, which is critical for ensuring safety while operating equipment near these lines. Specifically, maintaining a distance of 10 feet for voltages up to 50,000 volts, plus an additional foot for each insulating ring, is essential to prevent accidental contact and potential electrical hazards. This approach takes into account the increased risk associated with higher voltages, emphasizing the need for greater clearance to ensure both worker safety and the integrity of the electrical infrastructure. The understanding of this regulation is vital because overhead power lines can be deceivingly close and may not always be visible when operating machinery. The extra foot for each insulating ring serves as an added safety measure, recognizing that insulating materials can provide additional protection against electrical shocks. Regulations outlined in OSHA standards and the National Electric Safety Code (NESC) emphasize the importance of these clearances, making it essential for operators to know and adhere to these guidelines when working near power lines. This knowledge is crucial for preventing accidents that could lead to severe injury or even fatalities in a work environment.