The manual contains information on the requirements for electrical networks, on elements of electric networks, with design and methods of laying, marking of overhead and cable lines, on standard electrical diagrams, parameters, wire cross-section, the basics of mechanical calculations of wires of overhead power lines are considered, methods of calculation of district and local electric networks are also described, technical inspection of double-winding transformers with capacity up to 10000 kW is described, voltage up to 35 kV, issues of winding and coil repair of DC and AC electrical machines with a capacity of up to 500 kW, maintenance, connection of current-carrying parts of the input of the switchgear.