Bimetallic connections are common in electrical installations to join aluminum and copper conductors. Bimetallic connections are used in the distribution of power, transformers, and switchgear, where aluminum cables have to be connected to copper terminals. Though bimetallic lugs are meant to deal with the issues of working with dissimilar metals, temperature differences have a dramat... https://www.pioneerpowers.com/bimetallic-lugs-and-connectors.php