Zap Your Way to Success with the 2025 NEC Articles Practice Test – Electrify Your Knowledge!

Article 220 of the National Electrical Code (NEC) specifically addresses branch circuits and feeders. This article provides detailed guidelines on computations for branch circuits and feeders, focusing on load calculations necessary to ensure adequate supply and demand are met for various types of electrical systems.

This article emphasizes the importance of correctly sizing conductors and overcurrent protection for both branch circuits and feeders to maintain safety and efficiency in electrical installations. It also includes requirements for service capacity and demand factors as they relate to different installations, ensuring that they receive the right amount of electrical load without causing overloading or potential hazards.

Other articles, while they may address important aspects of electrical installations, do not specifically cover both branch circuits and feeders in the manner that Article 220 does. For instance, while Article 210 focuses solely on branch circuits, Article 225 revolves around outside feeders and branch circuits supplied from a building. Understanding how Article 220 integrates the considerations for both branch circuits and feeders is crucial for proper electrical system design and compliance with NEC standards.