In grounding electrical systems, copper bonded earthing rods and solid copper rods are both popular options—yet vastly different in design, functionality, and expense. Copper Bonded Earthing Rods The rods have a high-tensile steel core that is molecularly bonded with a coating of pure copper. The construction takes the mechanical properties of steel and blends them with copper's... https://www.pioneerpowers.com/copper-bonded-earth-rod.php