Bi-metallic lugs are a critical component used in electrical installations when aluminium cables need to be spliced over copper bus bars or terminals. The design of such lugs is specially made to avoid galvanic corrosion and provide a long-lasting, low-resistance connection between different metals. The Aluminium Barrel: Central Part of the Bi-Metallic Lug The aluminium section ... https://www.pioneerpowers.com/bimetallic-lugs-and-connectors.php