The disclosure provides a chemical reduction of a metal in a cable of an electrical network, which brings about an improvement in the conductive properties of said metal and a reduction in losses during electric power transmission. The invention discloses a reducing compound with a high concentration of quasi-free electrons, which is obtained as a result of the solvation of metals selected from group I and group II of the main group of the periodic table of elements and of amines selected from the group consisting of: pyridine, and dimethylformamide dispersed in a liquid oligomer, with a metal:amine:dielectric molar ratio of 1:2:1.5, allowing, in an alternating electromagnetic field, to initiate a pulsed injection of electrons into the network with a periodicity equal to frequency of alternation of the voltage.