Which NEC article provides the methods for calculating electrical loads for feeders and service sizing?

• A. Article 220 (Load calculations)
• B. Article 215 (Feeders)
• C. Article 110 (General safety)
• D. Article 410 (Luminaire mounting)

Answer: (A)

The main idea here is where the NEC tells you how to determine how much electrical load your system must be able to carry in order to size feeders and the service. This article lays out the step-by-step method for calculating that load: tally all expected power demands (lighting, outlets, appliances, fixed equipment), classify and handle continuous versus noncontinuous loads, apply demand factors to reflect typical simultaneous usage, convert the total load to amperes, and then use that value to size conductors and the service equipment. It provides tables and rules for different occupancies and scenarios so the calculation isn’t just a guess but a defensible, code-compliant load estimate. The other articles focus on sizing the feeders themselves, general safety requirements, or specific installation details for luminaires, rather than providing the load calculation method.