What is the purpose of a service entrance in a residential electrical system?

The purpose of a service entrance in a residential electrical system is to provide a means for electrical service to enter the building. This component plays a critical role in the electrical infrastructure of a home, as it is the point where the utility company's electrical supply connects to the home’s internal wiring system. The service entrance typically includes necessary equipment such as the service entrance conductors, a meter, and any required disconnects or circuit breakers that help manage and distribute electrical power throughout the residence.

By ensuring a secure and regulated entrance for electrical service, it enables safe and compliant operation of all electrical loads within the home. Proper installation of the service entrance is essential, as it directly impacts the home's overall electrical safety, performance, and ability to meet code requirements stipulated by the International Residential Code.