What are "overhead lines" in electrical distribution?

Overhead lines in electrical distribution refer specifically to utility wires that are suspended above the ground and supported by utility poles. This infrastructure is essential for transmitting electricity from power plants to substations or directly to consumers. The design of overhead lines allows for efficient power distribution while also providing accessibility for maintenance and repairs. Additionally, these lines are typically placed in a network that can withstand environmental factors like wind and rain, which is critical for reliable service.

In contrast, the other choices represent different forms of electrical distribution or equipment. Cables buried underground relate to a different method of installation called underground cabling, which is distinct from overhead lines. Wires located within buildings pertain to internal wiring systems and do not relate to the external distribution network. Circuit breakers, while crucial for protecting electrical systems, are not classified as overhead lines since they are used in specific safety contexts, often indoors, rather than for the aerial distribution of power.