Our ever-increasing dependence on electricity demands improvements in the quality of its supply. The deregulation of electric (and other) utilities, the events of 9/11, and the blackouts in North America, London, and the Italian peninsula evidence this need. This book looks at our current transmission systems and how loop circuits can substantially improve the reliability of transmission lines, essentially to provide a two-way feed to the consumer and insuring continuity of service if a fault develops on the circuit. It also covers distribution systems and includes information on how small generating units can be connected directly to the distribution system in the same manner as in larger cogenerating units.