A power line is a system of wires and cables that carries electricity from power plants to homes and businesses. These lines are part of the electrical grid, which ensures that energy is distributed efficiently. Power lines can be found overhead on tall poles or underground, depending on the area and local regulations. Power lines are essential for delivering electricity to various devices and appliances, enabling modern conveniences like lighting, heating, and cooling. They are often marked with warning signs to ensure safety, as they carry high voltage electricity that can be dangerous if touched.