S-Pb: ENSTO ROSEP, 2006. 117 s. Authors: Login C. E. , Logins A. In. , Shamanov D. G. Strikes B. M. This publication is devoted to the design of air . Power supply voltage 0. 38 21) kV with self-supporting insulated and stitched wires. The use of self-supporting insulated and protected wires is by far the most progressive and promising way to develop electric distribution networks. The high economic efficiency of such wires is achieved due to a significant increase in the reliability of electricity supply to consumers and a sharp decrease in the cost of electric wires compared to it by eluted wires .. It consists of four books .. Book I "System of self-supporting July wires up to 1 kV 6s i separate carrier element" , Book 2 "System of self-supporting isolated wires up to 1 kV with an isolated zero-carrying conductor" , Book 3 - "System of self-supporting insulated wires up to 1 kV with non-insulated n - left carrier conductor" , Book 4 "The system of protected wires with a voltage of 6-20 kV" . The first volume of the second edition of book 4 is based on the construction of single-chain and double-chain supports on ba tc reinforced concrete racks. Book 4 of this series contains materials for use in electrical and mechanical calculations of power line elements, installation diagrams of supports, recommendations for the use of ENSTO linear valves for the protected wire system . The book includes tables of mounting booms and tables of calculated spans on the PUE of the 7th edition . The manual is intended for engineering and technical workers , by Design, construction and operation of electrical networks, as well as for trainees of advanced training courses , students and teachers of electric power higher and secondary educational institutions in the quality of educational-methodological and reference manual .