Chicago Supervising Electrician Practice Exam 2026 – Your All-in-One Guide to Certification Success!

The purpose of Article 215 in the National Electrical Code (NEC) is to define feeder applications. This article provides guidelines on the installation of feeders, which are the conductors that connect the service equipment to the branch circuits. It covers various aspects related to feeder sizing, the capacity of the conductors, and additional considerations such as load calculations and demand factors that must be taken into account when designing feeder systems. Understanding feeder applications is crucial for ensuring that electrical installations are safe and effective in delivering power to the associated branch circuits. This helps in preventing overloading and maintaining efficient operation of the electrical system.