Bi-metallic lugs are critical elements in electrical installations where aluminium cables need to be joined to copper bus bars or terminals. These lugs are designed to prevent galvanic corrosion and provide a long-lasting, low-resistance joint between dissimilar metals. The aluminium portion of the bi-metallic lug is referred to as the aluminium barrel. The barrel itself is so constr... https://www.pioneerpowers.com/bimetallic-lugs-and-connectors.php