The copper cable lug current-carrying capability is based on such variables as the cable cross-sectional area, the grade of copper, the insulation type, installation conditions, and working temperature. Copper cable lugs are engineered to keep pace with the ampacity of cable being ended so that connections can be safe and efficient. For instance, a 150 mm² copper cable lug would be... https://www.pioneerpowers.com/copper-cable-lugs.php