Fatal Accident Circumstances and Epidemiology (FACE) Report: Construction Worker Electrocuted When Crane Boom Contracts 13,800 Volt Power Line in Arizona

摘要

The fatal accident circumstance and epidemiology report on an incident involving an electrocution is presented. A construction company was in the process of laying sections of concrete water pipe in the Arizona desert when the fatal accident occurred. The company had been laying pipe all morning. The crane was moved as needed to lift the heavy concrete pipe into place. At approximately 11:20 a.m. two workmen guided the crane operator into a new location. As the workmen were in the process of placing support timbers beneath the outrigger pads, the operator began extending the crane boom to prepare for the next lift. The boom contacted a 3 phase 13,800 volt overhead power line, thereby electrocuting one of the workmen who was in contact with the crane's outrigger. Recommendations for preventing future accidents of this type include deenergizing and grounding distribution and transmission lines if feasible, maintaining a uniform clearance between the crane and the overhead lines, and using a single man when it is difficult for the crane operator to use direct observation to maintain proper clearance. Safe work practices as using non-conductive tag lines to guide loads, insulating personal protective equipment, and storing materials away from power lines should be practiced.