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The connection of copper cable with aluminum cable is only possible if there is a division of splice between them, otherwise, they will wear out due to an electrochemical reaction known as galvanic corrosion reaction... How does galvanic corrosion happen? Image result for what is galvanic reaction Galvanic corrosion is an electrochemical process. All metals have different electrochemical potentials between them. When two metals of different potentials come into electrical contact and are immersed in an electrolyte, one of the metals undergoes the corrosion process. Therefore, whenever you make a splice or connection involving aluminum cables and copper cables, use suitable materials, that is, bimetallic material. There are bimetallic terminals for connections to the circuit breaker terminal, thus avoiding galvanic corrosion when connected directly, just as there are split screw connectors known as split bolts for connecting copper cables with aluminum cables, thus avoiding galvanic corrosion due to contact between them... Hugs from the miner to everyone and, oh, don't forget to subscribe to the channel, leave your like and share the video if you want to help the channel, ok?