Which article provides guidelines for calculating branch-circuits, feeders, and services?

Article 220 of the National Electrical Code (NEC) is specifically dedicated to the calculation of branch circuits, feeders, and services. This article outlines the requirements for determining the load calculations essential for properly sizing electrical conductors and overcurrent protection devices.

The guidelines found in Article 220 assist in ensuring that the electrical systems installed can safely handle expected demands without risking overloads or failures. This may include calculating the anticipated loads from various electrical devices and equipment, accounting for demand factors, and considering the diversity of loads throughout a given space.

Additionally, Article 210 focuses on branch circuits, including their requirements but does not encompass the broader calculations for feeders and services. Articles 240 and 250 pertain to overcurrent protection and grounding, respectively, rather than the load calculation processes. Thus, Article 220 is the comprehensive reference for the specific context of load calculations across branch circuits, feeders, and services in the NEC framework.