When electrical installations are done using bi-metallic lugs, there are some serious precautions to be followed to provide safety, reliability, and good performance over the long term. Always make sure that the installation is done on a de-energized circuit—check for the lack of voltage before beginning work in order to avoid electrical shock or short circuits. Employ the proper size... https://www.pioneerpowers.com/bimetallic-lugs-and-connectors.php