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🔹Scope – Commercial Electrical Inspector
A Commercial Electrical Inspector is responsible for ensuring that electrical installations and alterations in commercial and industrial structures meet the requirements of applicable codes and standards. This includes inspecting wiring systems, conductors, grounding, overcurrent protection, and electrical equipment for safety, functionality, and compliance. Inspectors at this level may evaluate electrical systems of any size or capacity, including high-voltage installations, ensuring proper performance and protection for occupants and property.
🔹 Exam Information
About the ICC Commercial Electrical Inspector Exam
- Based on:
- NFPA 70: National Electrical Code (NEC) 2023 Edition
- Ugly’s Electrical References (any edition)
- Format: Open-book, multiple choice
- Time: 3.5 hours (80 questions)
- Passing Score: 75%
🔹Exam Content Breakdown – 2023 Commercial Electrical Inspector🔹
| Exam Section | Suggested Study Chapters / Focus |
|---|---|
| ✅ General Requirements (10%) | NEC Articles 90, 100, 110, 200 – General, Definitions, and Requirements for Electrical Installations |
| ✅ Services (17%) | NEC Articles 230, 250 (Parts for Service Grounding and Bonding) |
| ✅ Branch Circuit and Feeder Requirements (19%) | NEC Articles 210, 215, 240, 250 (Branch Circuits, Feeders, Overcurrent Protection, and Equipment Grounding) |
| ✅ Wiring Methods and Distribution Systems (19%) | NEC Articles 300–392 – Wiring Methods, Raceways, Cable Assemblies, Boxes, and Enclosures |
| ✅ General Use Equipment (12%) | NEC Articles 400–450 – Flexible Cords, Fixtures, Appliances, Motors, Transformers |
| ✅ Special Occupancies (9%) | NEC Articles 500–517 – Hazardous Locations, Health Care Facilities, Commercial Garages |
| ✅ Special Equipment (7%) | NEC Articles 680–695 – Swimming Pools, Fountains, Signs, Data Equipment |
| ✅ Special Systems (7%) | NEC Articles 700–830 – Emergency Systems, Fire Alarm, Signaling, and Communication Systems |
🔹 Study Tips
- Focus extra time on the highest-weighted sections — they carry the most points on the exam.
- Mark your codebook with tabs for fast navigation.
- Practice under timed conditions to simulate real test pressure.
- Use flashcards for quick lookup and instant feedback when reviewing material.
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