What role does a service entrance play in electrical installations?

The service entrance serves a critical function in electrical installations as the point where electrical power enters a building. This area is essential because it connects the utility's power supply to the electrical system within the structure. It typically includes components such as the main service panel, which distributes the power to various circuits throughout the facility, and a meter that measures the electrical usage.

By facilitating the incoming power supply, the service entrance enables all electrical systems and devices within the building to operate effectively. Understanding this role is crucial for anyone working in electrical installations, as it highlights the importance of proper installation and safety standards at the entry point of power into a structure.