For structures exceeding what height must the interconnection of the lightning protection system grounding electrodes be in a ground loop conductor form?

For structures that exceed a height of 60 feet, it is essential to interconnect the grounding electrodes of the lightning protection system in a ground loop conductor form. This requirement is based on the principles of providing adequate grounding for lightning protection systems.

As a structure's height increases, the risk of it being struck by lightning also increases. A ground loop conductor configuration helps ensure that the grounding system can effectively dissipate the high voltage and current associated with a lightning strike. This design minimizes potential differences within the grounding system, which can help to protect the structure and its occupants from lightning-related hazards.

Using a ground loop conductor form provides a continuous path to ground that reduces resistance and improves the system's overall performance in discharging lightning energy safely into the earth. Implementing this requirement for taller structures enhances the safety measures necessary to manage the increased risk associated with their height.