What does premises wiring include?

Premises wiring encompasses a comprehensive array of wiring components, both interior and exterior, that are involved in distributing electrical power throughout a building. This includes not only the main wiring that connects to the power source but also all branch circuits, feeders, and any associated components such as receptacles, switches, and lighting fixtures.

By defining premises wiring in this broad manner, the National Electrical Code ensures that all aspects related to the electrical infrastructure of a building are covered, providing a safe and efficient electrical system. This holistic view eliminates confusion regarding which parts of the wiring are included in compliance with safety standards, thereby enhancing safety and promoting proper installation practices across all types of buildings and structures.

The other options are limited in scope, focusing only on specific parts of the wiring system, and do not reflect the comprehensive nature of what premises wiring entails, which is crucial for providing a complete and reliable electrical system.