Which NEC article pertains to branch circuits?

The correct answer is Article 210, which specifically addresses branch circuits in the National Electrical Code (NEC). This article outlines the requirements for the installation and operation of branch circuits, including aspects such as load calculations, wiring methods, and overcurrent protection. It covers various applications of branch circuits, ensuring that electrical systems are both safe and functional.

Understanding Article 210 is essential for electricians, as it provides guidelines on how to design and install circuits that deliver power to outlets, lighting, and appliances properly. This focus on branch circuits is crucial because these circuits are the foundation of most electrical systems, directing power from the panel to various loads throughout a building.

The other articles mentioned are focused on different aspects of electrical installations. Article 220 deals with branch circuit, feeder, and service load calculations, which is important but not directly about branch circuits themselves. Article 225 pertains to outside branch circuits and feeders, which is a more specific area of electrical work. Article 409 talks about industrial control panels, which do not primarily concern branch circuits. Thus, Article 210 is the correct reference for general information related to branch circuits as per the NEC.