It has been shown that the insulating partition has an effect on current distribution over porous electrodes (PE) through the change of the solid-phase potential profile P(x). Under the conditions providing insignificant differences in the profiles P(x) (the solid phase exhibits high conductivity, an additional current feeder is located close to the immobile back current feeder), integral characteristics of PE efficiency are close to each other, too. On the contrary, in case of significant differences in P(x) profiles (low conductivity of porous matrix, long distance between the main current feeder and the additional one) the indices of performance efficiency are also different, these differences being positive in the absence of the partition. The reason of this positive effect is as follows : in the absence of a partition, the additional equipotential current feeder does not screen the back section of PE but, quite contrary, helps increasing the current through the back section. This improves the performance efficiency of this section, thus improving the efficiency of the whole PE.