Is an auxiliary grounding electrode for an electric sign on a pole required to be in addition to the equipment grounding conductor?

An auxiliary grounding electrode for an electric sign on a pole is indeed required to be in addition to the equipment grounding conductor. The purpose of grounding in electrical systems is to ensure safety by providing a path for fault current to the ground, which helps prevent electric shock and equipment damage.

In the context of electric signs, auxiliary grounding electrodes serve as an additional safety measure ensuring that the sign is properly grounded in case of any electrical faults. This is especially important when the sign is mounted on a pole, as various environmental factors, such as wind, rain, and physical impacts, can affect the integrity of electrical connections.

Therefore, having an auxiliary grounding electrode in addition to the equipment grounding conductor enhances the safety and reliability of the installation. The requirement is typically set by national electrical codes, which emphasize additional grounding for specific structures and equipment to mitigate risks associated with electrical installations.