What is the assembly used to connect an overhead line to an underground line known as?

The assembly used to connect an overhead line to an underground line is known as a cable riser. This device serves an essential role in utility systems by providing a secure and weatherproof transition between the overhead power lines and the underground network. The cable riser allows for vertical movement of the cable while maintaining protection from various environmental factors, such as moisture or physical damage.

Furthermore, the design of cable risers ensures that the electrical connections remain intact and safe for both maintenance and operational purposes. This makes them a critical component in distribution networks where overhead and underground systems are integrated to provide reliable service to customers.

In contrast, a transformer station refers to a facility that houses transformers to change voltage levels for power distribution. A tap connector is used to join smaller conductor lines to larger conductors, and a service drop typically refers to the final span of the distribution lines that deliver electricity from a utility pole to a customer's premises. While these options are related to electrical distribution, they do not specifically describe the assembly that connects overhead and underground lines.