The electricity system with 20 kV deep lead for power supply of agricultural consumers is considered. This system allows to approximate high voltage maximum to nodes of consumption and considerably to reduce length of a low voltage network. Lowerung losses of voltage, power and energy in electrosupply system with 20 kV deep leads is thheoretically justified. It confirms advantages of this perspective system as contrasted to existing. In generalized aspect the deficiences of the perspective scheme are shown. They are bound to higher expenditure of active materials and increase of total power losses in transformers at lowering single power and sharp growth of transformers number in a distributive network.