Which of the following grounding methods is suitable for overhead transmission lines?

The choice of static wire grounding is suitable for overhead transmission lines because it serves a crucial function in managing electrical surges and maintaining safety. Static wires, typically installed above the conductors, are designed to intercept lightning strikes and dissipate the electrical energy effectively into the ground. This method helps protect the transmission line and its components from damage due to surges, ensuring a more reliable and safe operation of the power line system.

Static wire grounding also aids in minimizing electromagnetic interference and enhances the overall grounding system by providing additional pathways for fault currents to dissipation, thus ensuring the safety of both personnel and equipment. This method is an accepted practice in the industry for reducing risks associated with overvoltages caused by lightning or switching actions.

Other options, while they may involve grounding in some contexts, do not provide the same level of protection or reliability for overhead transmission lines. Connecting to an antenna, for instance, is not designed with the same protective measures as static wire grounding, and grounding through a clamp to a pole might not provide a low-resistance path like that of a properly installed static wire. Direct connections to the road lack the necessary safety features required for effective grounding in transmission line systems.