What is the primary function of an external earth connection or ground rod?
Prevent static build up on power lines
Lightning charge dissipation✓Correct answer
Reduce RF current flow between pieces of equipment
Protect breaker panel from power surges
Explanation
An earth connection exists to give lightning and other surge currents a direct, low-impedance path into the soil instead of through the wiring and the equipment attached to it. Bonding conductors run between chassis are what limit RF current flowing from one piece of equipment to another, and a breaker panel is protected from surges by a surge protective device, not by the electrode itself.