Overhead Lines vs Underground Cables: Key Differences Explained
Power plants, where electricity is generated, are usually located far from the load centers. To carry this electrical power from the plant to the load points, two systems of conductors are developed, called the transmission system and the distribution system. These conductor systems are developed overhead and underground. In this blog, we explore these two power lines and the differences between them. Overhead Transmission Lines An overhead line is an infrastructure set up to send electricity or signals through cables suspended in the air. For transmission lines and primary distribution networks, overhead conductors are generally left uninsulated. However, for low voltage distribution, wires may be insulated. For example, aerial bundled cables. Poles or steel towers hold these cable lines at a safe height. These lines are common for power distribution and telecommunications. These transmission lines are made up of conductors, insulators, supporting frameworks, cross-arms and vari...