Ground cable clamps with serrated jaws serve what purpose?

Ground cable clamps with serrated jaws are specifically designed to enhance the grip on the surface with which they make contact. The serrations create a series of small, raised points that dig into the surface of the ground cable or ground rod, thereby improving the mechanical connection. This increased surface area contact reduces contact surface resistance, which is crucial for effective grounding. A lower contact resistance allows for better electrical performance, ensuring that any fault currents are efficiently directed to ground without excessive resistance that could lead to hazardous conditions.

The design does not contribute to insulation, nor is it focused on aesthetics. Additionally, while improving or increasing surface resistance is not beneficial in grounding applications, reducing contact surface resistance is essential for optimal performance and safety.