# 1 Master Electrician Exam Prep 2023 | NEC 220.86 Optional Method Tutorial Welcome to our in-depth tutorial on how to perform service and load calculations for a school using the optional method as outlined in the 2023 National Electrical Code (NEC), Section 220.86. This video is an essential resource for anyone preparing for their electrical exams, including those aiming to become a master electrician. 📚 What You Will Learn: Detailed steps on how to calculate service and load using NEC 220.86