Final answer:
The minimum safe working distance when operating a crane in the vicinity of a high voltage line carrying 10,000 volts is typically 10 feet, as per OSHA guidelines.
Step-by-step explanation:
When operating a crane near high voltage lines, it is crucial to maintain a minimum safe working distance to prevent accidents due to electrical arcing or other conductive hazards. The Occupational Safety and Health Administration (OSHA) sets forth guidelines for these safety distances in the United States. For a power line carrying 10,000 volts, the minimum safe distance is typically 10 feet. However, it is important to note that local regulations and company policies may enforce stricter safety measures, and it is always advisable to consult the specific guidelines pertaining to your area and activity. If the voltage of the line is unknown, one should operate with a clearance of at least 10 feet, or for lines with higher voltages the distance may be greater.