Final answer:
The minimum clearance distance between cranes and power lines as per OSHA depends on the voltage of the power lines, starting at 10 feet for up to 50kV and increasing for higher voltages. Operators must be trained and use spotters or barriers to maintain these distances.
Step-by-step explanation:
The question pertains to the Occupational Safety and Health Administration's (OSHA) regulations regarding the minimum clearance distance between cranes (and all parts of the load) and power lines. According to OSHA standards, the minimum clearance distance depends on the voltage of the power lines. Generally, the clearance should be 10 feet for power lines with voltages up to 50kV. For power lines with higher voltages, the minimum distance increases. Knowing the exact voltage is essential to determine the required clearance. Additionally, if the equipment is in transit with no load and the boom lowered, the minimum clearance distance may be reduced. It's important for operators to be trained and to always use a dedicated spotter or employ non-conductive barriers to ensure these distances are maintained to prevent electrical hazards.