Which article of the NEC contains the requirements for branch circuits?

The correct answer pertains to Article 210 of the National Electrical Code (NEC), which specifically addresses the requirements for branch circuits. This article outlines the rules for the design, installation, and protection of branch circuits including their capacity limits, types of conductors, and how to properly protect them against overloads. It also covers the wiring methods acceptable for various applications, ensuring that branch circuits are installed safely and effectively to support electrical loads within residential, commercial, and industrial settings. Understanding Article 210 is crucial for compliance with safety standards and for ensuring that electrical systems operate efficiently without risking overloads or failures.