Which NEC article covers the sizing and protection of feeder conductors?

Which NEC article covers the sizing and protection of feeder conductors?

• A. Article 215 (Feeders)
• B. Article 220 (Load calculations)
• C. Article 110 (General safety)
• D. Article 400 (Flexible cords)

Answer: (A)

Sizing and protection of feeders is covered by Article 215. This part of the NEC directly addresses feeders—the conductors that run from the service disconnect to distribution equipment—and lays out how to size them based on ampacity and the expected load, including the required overcurrent protection. It also provides adjustments for temperature, insulation, installation conditions, and other factors to ensure the chosen conductor size remains safe in real-world conditions. The other articles aren’t focused on feeders: Article 220 deals with calculating loads to determine service size, Article 110 covers general safety and administration, and Article 400 covers flexible cords.

Sizing and protection of feeders is covered by Article 215. This part of the NEC directly addresses feeders—the conductors that run from the service disconnect to distribution equipment—and lays out how to size them based on ampacity and the expected load, including the required overcurrent protection. It also provides adjustments for temperature, insulation, installation conditions, and other factors to ensure the chosen conductor size remains safe in real-world conditions. The other articles aren’t focused on feeders: Article 220 deals with calculating loads to determine service size, Article 110 covers general safety and administration, and Article 400 covers flexible cords.