What do you call the underground service conductors that connect the street main to the first point of connection in a building?

The term used to describe the underground service conductors that connect the street main to the first point of connection in a building is known as the service lateral. These conductors are specifically designed to deliver electricity from the utility supply to the building's electrical system, serving as the critical link between the utility's infrastructure and the building's electrical service equipment.

The service lateral is typically installed underground and is an essential component of the electrical distribution system, ensuring that the building has a safe and reliable source of electrical power. It is distinct from other components such as the service main, which refers to the larger distribution system managed by the utility company, and utility lines, which encompass all overhead or underground power supplying infrastructures. While power cables are a broader category that includes various types of electrical conductors, they do not specifically refer to the conductors connecting the street main to a building. Thus, the correct answer accurately identifies the specific function and location of these conductors within the National Electrical Code framework.