What is the equipment through which power typically enters a building?

The entrance of power to a building is typically facilitated by service drop conductors and underground lateral conductors. Service drop conductors are overhead lines that bring electricity from the utility provider down to the building, while underground lateral conductors perform a similar function but run underground. These components are crucial for establishing the electrical service connection that supplies power to the building's electrical system.

Fuses and breakers serve a different purpose; they are protective devices designed to interrupt the flow of electricity in case of overloads or faults, ensuring safety and preventing damage within the electrical infrastructure. Transformer equipment is also not the direct entry point of power; rather, it modifies voltage levels within the electrical distribution system, which occurs before the power reaches the building. Substation connections are part of the broader electrical grid that supplies power to multiple locations but do not represent the specific equipment that directly brings electricity into a single building.