What are the acceptable methods for connecting grounding conductors to grounding electrodes?

The correct method for connecting grounding conductors to grounding electrodes involves the use of listed connectors or clamps. This approach ensures that the connections are reliable, properly rated for electrical use, and compliant with safety standards. Listed connectors and clamps are specifically tested and approved for such applications, providing assurance that they will effectively maintain the integrity of the electrical grounding system.

Using screws alone does not guarantee a secure or lasting connection, as screws may work loose over time or may not adequately handle the mechanical and electrical stresses involved. Welding might provide a strong bond, but it is not always a feasible option in all installations and may not be permitted in certain codes or standards. Relying on a combination of methods, like those mentioned in the other answers, can lead to inconsistencies in safety and performance. Therefore, the use of listed connectors or clamps is the preferred and widely accepted method for grounding conductor connections.