Here is considerable literature related to the electrical conductivity of liquid-crystalline materials. However, it seems, that the electrode interfacial phenomena were not taken into account consequently. This provoked some criticism. This criticism is supported by frequency domain data. These data are indicating electrode polarization as dominant mechanics, in long period time, particularly. The data related to frequency domain and time domain were analyzed. Now, it seems, that at least in liquid-crystalline cyanobiphenyls materials, due to electrode effects, DC conductivity can be observed. However, in this case one can expect non-uniformity of electrical field in the plane parallel/sandwich/sample. The aim of this contribution is an analysis of these effects and their relations with the result obtained in the past and the critical evaluation of a previously assumed material characterization.