The parameters of overhead and cable power lines, generators, transformers, switches, reactive power sources and other electrical equipment required for the design and operation of electrical networks are given. The reference book takes into account all modern trends in the development of the main equipment of electrical networks. In particular, the directory includes technical data on wires of new generation overhead power lines, cables with cross-linked polyethylene insulation, the latest equipment of substations. The handbook is intended for specialists involved in the design and operation of electrical networks, as well as for students of energy universities.