What is the definition of service-entrance conductors?

Service-entrance conductors are defined as the conductors that connect the service equipment, which includes the meter and the main disconnect, directly to the power supply from the utility company. This defines their role within the electrical distribution system as they are critical in facilitating the safe and effective delivery of electrical power to a building.

These conductors are essential because they oversee the initial connection point for electricity into a building's electrical system. They typically handle high currents from the utility and must be appropriately sized and protected according to electrical codes to ensure safety and efficiency.

The other options, while related to electrical systems, do not specifically describe the function of service-entrance conductors. Conductors that carry electricity within the building refer to interior wiring, grounding conductors serve to safely divert excess electricity to the ground, and conductors that are usually underground describe a particular installation method rather than the definition.