Which NEC article covers service equipment and disconnecting means?

• A. Article 230
• B. Article 250
• C. Article 314
• D. Article 404

Answer: (A)

The question tests where the service equipment and the device that disconnects the supply from the utility are regulated. The article that covers service conductors, service equipment, and the service disconnecting means describes how these parts must be installed, located, and accessed, and it sets the rules for the main disconnect that isolates power to the building. It also addresses how the service conductors are protected and connected to the building’s electrical system. Grounding and bonding are addressed in a separate article, so they’re related but not the same topic as the service equipment itself. Other articles focus on different parts of electrical installations, such as enclosures and boxes for wiring methods or specific types of switches, rather than the overall service equipment and disconnecting means.