This article presents a new methodological framework for the preliminary assessment of the possible duration of power supply interruptions for rural consumers. The main objective of the study is to analyze the technical condition of 0.38–10 kV distribution networks and determine their reliability level. The proposed method is based on calculating the failure frequency, redundancy coefficient, and the time required to restore the system’s operability. The practical verification of the method was carried out using statistical data from JSC “Khorezm ET,” which made it possible to identify network sections with reduced reliability. The developed approach can be effectively applied in the modernization of rural power distribution networks, as well as to improve the quality and continuity of power supply to consumers.