Copper cable lugs, such as Pioneer Power International lugs, are engineered to be long-lasting and reliable, but they can nonetheless fail or degrade as a result of various causes. 1. Faulty Crimping or Installation: One of the most common reasons for copper cable lug failure is improper crimping technique or the application of the wrong tool. Failure to compress the lug onto the ... https://www.pioneerpowers.com/copper-cable-lugs.php