... (OHGWs) on either side of the structure. Based on the voltagelevel of the line, the conductors and OHGWs are configured to provide, at least, the minimum clearancesmandated by the National Electrical ... Book for Electrical Engineering, 11th ed., McGraw-Hill, NewYork, Sec. 18, 1978.Gonen, T., Electric Power Distribution System Engineering, Wiley, New York, 1986.Gonen, T., Electric Power Transmission ... result in a loss of power to a large area for several hours. The potential financial losses emphasize the importance of a reliable design of the insulation. The insulation of an electric system is...