What is the term for an underground service entrance?

The term for an underground service entrance is "service lateral." This designation specifically refers to an underground system that brings electricity from a utility's distribution system to the building or structure. Typically, a service lateral connects the utility’s overhead or underground facilities to the metering equipment located within or outside the building.

This term is important for distinguishing between various types of service connections. For example, a "service drop" refers to the overhead connection that supplies electricity from utility poles to a building, and "main entrance" is often used informally to discuss the main point where electrical services enter a structure, but it does not specify the method of delivery, such as underground or overhead. Meanwhile, "grounding system" relates to safety measures that ensure electrical systems are properly grounded to prevent electrical shock or fire, but it does not describe how the electrical service itself enters a property.