Compatible with Scully Intellitrol or ST-47 Groundhog System The Groundhog’s™ intelligent monitoring capabilities and the special electronic circuitry inside the Scully Ground Ball and Ground Bolt form a self-proving system. No manual checks are needed. Only the Scully Groundhog™ can provide you with the safest and most dependable means for vehicle static grounding. It maintains the integrity of your loading operation. The Groundhog™ can be used as a completely independent system. This system is ideal for top loading or applications where a Scully Overfill Prevention System is not in use. The control monitor connects to a heavy duty Sculcon® junction box with attached cable and special quick release snap-on plug. The Scully Ground Plug connects to a specially designed electronic Scully Ground Ball mounted on each vehicle. The controller in conjunction with the ground ball provides and verifies vehicle grounding before loading can begin. The controller must receive an electronic return signal from the ball throughout the loading operation.