The author considers specific features of closed ringed and meshed electrical networks. The circulating current (CC) in the loop of a network not only raises its power losses but adversely affects capacity of the whole power line as well. Attempts to reduce CC with the help of reactive current in a loop or combining supply sources give no positive results. To solve the problem, the CC in a loop can be found in two ways: 1) by subtracting the current in a branch pertaining only to this loop of a network with branch resistances (R-network) from the current of the same branch of a network with branch impedances (Z-network); 2) using CC matrix which in a reduced version should also be employed to define the opposing voltages for all independent loops in order to eliminate or reduce CC in them The CC in branch common for two adjacent loops can be found by combining its values in both the loops. In the work it is found that the losses from CCs are equal to the sum of squared modules of branch CCs multiplied by respective branch resistances.