What is the term for the service conductors from the service equipment to the underground service conductors?

The term for the service conductors from the service equipment to the underground service conductors is "Service-Entrance Conductors, underground system." This designation aligns with the National Electrical Code, which describes service-entrance conductors as those conductors that connect the utility service point to the electrical service equipment. When referring specifically to underground service systems, "Service-Entrance Conductors" effectively captures the requirement and intent of these conductors, ensuring clear communication within the context of installation and code compliance.

The other terms do not accurately capture the definition as outlined in the NEC. For instance, "Buried Service Conductors" may imply that the conductors are simply buried but does not specifically highlight their role in service entrance applications. "Subsurface Conductors" and "Underground Feeders" also lack the specificity needed to describe the conductors that connect from the service equipment to underground systems, leading to potential confusion in terms of code interpretation and practical application.