Yes, the feeder size should be the same on both sides of the splice box.The splice box is used to connect two sections of feeder cable. The purpose of the splice is to maintain the electrical continuity of the feeder and to provide a weatherproof seal.The feeder size is determined by the current-carrying capacity required for the load that the feeder is supplying. The current-carrying capacity of a cable is determined by its cross-sectional area. Therefore, the feeder size must be the same on both sides of the splice box in order to maintain the same current-carrying capacity.In addition, the feeder is tagged with the same size on both sides to ensure that the correct size of cable is used during maintenance or replacement. Flag for review