Abstract :
Recent extensions and consolidations of power companies and the extensive development of hydroelectric properties in the South has made it imperative that both city and county authorities take thought as to what precautions shall be required of corporations where use is made by them of the public highways for their overhead lines. Most of the transmission lines are in connection with two or more plants operated in parallel and are erected with a view to serving large sections of the country. In order to find proper market, very considerable distances must be traversed and economy as well as efficiency demands operation at excessively high voltages. The two most popular differences of potential in this field have been 66,000 and 110,000 volts.
