How long is the longest over head cable?

The longest overhead cable in the world is the "Mahatma Gandhi Setu" in India, which spans approximately 5.75 kilometers (3.57 miles) across the Ganges River. However, if referring specifically to power transmission lines, the longest single-span overhead power line is the "Xiluodu Dam" transmission line in China, which has spans exceeding 1,000 meters (3,280 feet) between towers. The exact length can vary based on the context and type of cable being discussed.