Materials on the construction and reconstruction of power transmission lines with voltages of 0.4–750 kV have been systematized. Information is presented on basic materials, components, transformer substations, switchgear, construction and installation works, operating materials, construction machines, and mechanization equipment. The issues of maintenance and repair of construction machines and vehicles, labor safety are covered. The basis is based on the materials of the Handbook on the construction and reconstruction of power transmission lines with a voltage of 0.4-500 kV. This publication has been supplemented with new brands of supports, line insulators, fittings, complete transformer substations and switchgear, construction machinery and vehicles, equipment and mechanization; provides data on new operating materials and components. For specialists involved in the design, construction and reconstruction of power lines, as well as university students.