Bimetallic lugs are designed to prevent galvanic corrosion between copper and aluminum by ensuring that each metal only connects with its compatible partner. In this setup, the aluminum barrel links to the aluminum cable, while the copper palm connects with the copper busbar or terminal. This clever design avoids direct contact between aluminum and copper, which could otherwise trigge... https://www.pioneerpowers.com/bimetallic-lugs-and-connectors.php