The NEC article that addresses service conductors and the equipment for control and protection of services is which?

• A. Article 200
• B. Article 230
• C. Article 300
• D. Article 400

Answer: (B)

Understanding which NEC article governs the supply side of an installation is tested here. Article 230 specifically covers service conductors—the wires that bring power from the utility into the building—and the equipment used to control and protect that service, including the service disconnecting means and the overcurrent protection for the service conductors. This is where the code defines what must be present and how it must be installed to safely deliver power to the building.

Other parts of the NEC focus on different topics: one area deals with the use and identification of conductors, another with wiring methods, and another with flexible cords and cables. None of these address the service conductors and service equipment in the same way Article 230 does, so they’re not the appropriate scope for this topic.