What type of conductor carries lightning currents between strike termination devices and grounding electrodes?

The correct response identifies the main conductor as the type of conductor that carries lightning currents from strike termination devices—such as air terminals or lightning rods—to grounding electrodes. This pathway is essential for safely directing the immense electrical current generated by a lightning strike into the ground, minimizing the risk of damage to structures and ensuring safety.

The main conductor is designed to handle the high current levels associated with lightning and is typically installed with attention to material and size specifications to support these intense electrical flows. This conductor plays a critical role in an effective lightning protection system, ensuring that the energy from the strike does not pass through the building structure itself, which could lead to catastrophic failures or fires.

Other types of conductors, such as auxiliary, support, and feeder conductors, serve different roles within the context of a lightning protection system and do not directly carry the lightning currents in the same manner as the main conductor. Thus, recognizing the primary function of the main conductor is key to understanding lightning protection principles.