What is the most common cause of crane-related fatalities?

The most common cause of crane-related fatalities is electrocution. Cranes and power lines can come into contact if precautions are not taken. In the United States, for example, the Occupational Safety and Health Administration requires certain precautions be taken whenever cranes operate near overhead power lines or conductors that have potential energy greater than or equal to 50 volts. Some states require additional training specific to this.