An overhead line carrying 13,200 Volts arced to a construction dump truck today when the operator raised the dump bed near the line. There were no injuries. The operator claims he was more than 15' feet away. The current exited at the left rear wheel where a nail was in the tire. The recommended "safe" distance from powerlines is typically 10' for this voltage. How much does relative humidity affect this recommended distance? The RH at the time of the incident was approx. 55%.
