Which article provides the rules for calculating loads for feeders?

Which article provides the rules for calculating loads for feeders?

• A. Article 210
• B. Article 220
• C. Article 230
• D. Article 300

Answer: (B)

The rules for calculating loads for feeders are found in Article 220. This part of the NEC guides you through adding up all expected loads (lighting, receptacles, appliances, fixed equipment, and any motors), applying demand factors and adjustments (including any continuous loads), and then using that total to size the feeder conductors and overcurrent protection. In practice, you determine the feeder’s ampacity by these calculations, ensuring the wiring can carry the expected load safely. Other articles cover related topics—like branch-circuit calculations in Article 210, service calculations in Article 230, or general wiring methods in Article 300—but Article 220 is specifically where the rules for calculating feeder loads come from.

The rules for calculating loads for feeders are found in Article 220. This part of the NEC guides you through adding up all expected loads (lighting, receptacles, appliances, fixed equipment, and any motors), applying demand factors and adjustments (including any continuous loads), and then using that total to size the feeder conductors and overcurrent protection. In practice, you determine the feeder’s ampacity by these calculations, ensuring the wiring can carry the expected load safely. Other articles cover related topics—like branch-circuit calculations in Article 210, service calculations in Article 230, or general wiring methods in Article 300—but Article 220 is specifically where the rules for calculating feeder loads come from.