NFPA 70, National Electrical Code, 2023 Edition

Commercial Electrical Code

The commercial provisions of the 2023 National Electrical Code, taught for electrical inspection, plans review, and GCHS construction management and estimating work. 14 lessons and a 60-question practice exam, self-paced.

About this course

Independent GCHS training

Each lesson has a dimensioned diagram, a glossary, 14 practice questions (20 in Lesson 14) and neural narration. Numbers were checked against the text of the 2023 NEC. Texas enforces the 2023 NEC statewide through TDLR (effective September 1, 2023), and cities such as Houston add local amendments, so local adoption governs. This is training, not a substitute for the adopted code.

Module 1: Administration and General Requirements

Module 2: Branch Circuits, Feeders, and Services

Module 3: Overcurrent Protection and Grounding

Module 4: Wiring Methods and Materials

Module 5: Equipment, Motors, and HVAC

Module 6: Special Occupancies, Equipment, Systems, and Review

Practice exam