Sets the bar for NEC education. No other textbook walks you through the articles the way Michael Hayes does.
THE NUMBERS BEHIND THE SPECIAL RULES
24,000
residential fires a year
Electrical failures and malfunctions start an estimated 24,000 residential fires in the US each year (USFA, 2014 to 2016 average).
Source: USFA50
states
The NEC is the benchmark for electrical design, installation and inspection, adopted in all 50 states.
Source: NFPA 70-2023 listing, ANSI Webstore39.8%
repeat-taker pass rate
California General Electrician exam, 2023. First-time takers passed at 51.2%.
Source: California DIR
Volume 2 of the 2023 edition begins at Article 500 and carries on through special occupancies, special equipment, special conditions and communications systems, all the way to Article 820.
Same plain-English approach as Volume 1: what the requirement says, why it exists, and what it looks like in the field.
WHAT'S INSIDE VOLUME 2
Explain why special locations and special equipment are treated differently, so you understand the rule before you apply it.
Show hazardous locations, special equipment and communications systems as you meet them on a job.
Walk the trickier calculations line by line so you can repeat them yourself.
Check yourself on each chapter before the inspector or the exam does.
Real pages from Volume 2 (2023 edition)
Volume 2 (Articles 500 to 820) covers Special Occupancies, Special Equipment, Special Conditions and Communications Systems.
Starting from the beginning? Volume 1 (2023 edition) covers Articles 90 to 480.
Hazardous locations, special equipment and communications systems are where many candidates lose points, because they get skimmed. Volume 2 explains the reasoning behind each rule instead of asking you to memorize it, then gives you review questions to test yourself. Pair it with Volume 1 and the whole 2023 Code is explained in the same voice.
Codes change every three years, and a crew that works from one edition and the same explanations reads a requirement the same way. That matters most in the special-condition Articles, where people most often interpret the Code differently.
Spent over a decade as an electrician and I still find myself reaching for Michael Hayes' books whenever I need to make sense of a Code article quickly. The NEC itself can be dense and technical, but these books make it accessible and actionable. The standout feature for me is the Author's Comments — they get into the reasoning behind each rule, which matters a lot when real job conditions don’t fit the textbook example. It’s not a one-time read; it’s a reference I come back to again and again.
Picked up Michael Hayes' books to prepare for my master electrician exam and cleared it on the first attempt after failing twice with other materials. The difference was obvious immediately. Where other NEC study guides just rehash the Code, this one actually breaks it down — detailed illustrations, step-by-step calculation examples, and review questions that genuinely test your comprehension. I now recommend this series to every apprentice I work with.
As an electrical inspector, I depend on Michael Hayes' materials for both ongoing professional education and daily reference work when evaluating Code compliance. The Author's Comments are especially useful in the field — they spell out the intent behind each requirement, which is exactly what I need when job site conditions don’t follow the textbook. The 2023 edition is current, accurate, and as well-organized as every edition before it. Any electrician at any stage should have this on their shelf.
Find answers to common questions about our products, shipping, returns, and more.
Volume 1 (Articles 90–480) focuses on the foundational areas of the Code, including general requirements, wiring and protection, wiring methods, and electrical equipment. Volume 2 (Articles 500–820) continues with special occupancies, special equipment, special conditions and communications systems. Both combine Author’s Comments, full-color illustrations, practical examples, and review questions to make the material easier to understand and apply.
It’s designed to be useful whether you’re just starting out or have years of experience in the electrical trade. The straightforward explanations, detailed color illustrations, and practical examples make complex Code requirements easier to understand and apply. Apprentices can use it to develop a strong foundation, while journeymen and master electricians can turn to it for everyday reference and exam preparation. Inspectors can also use it to reinforce their understanding and interpretation of the Code. The overall goal is simple: make the NEC easier to understand, regardless of your experience or background.
The NEC codebook gives you the official requirements; Michael Hayes’ guide helps you understand how to interpret and apply them. Throughout the book, the Author’s Comments provide additional context on the reasoning and intent behind key Code provisions, making it easier to understand why specific requirements exist. Full-color illustrations and practical, step-by-step examples then turn complex concepts into something much easier to visualize and apply in the field. For electricians using both resources, the guide serves as a practical companion that helps turn the Codebook from a collection of requirements into something you can confidently understand and use.
Yes. This edition is aligned with the 2023 NEC, incorporating the latest Code requirements and updates. Whether you're studying for a 2023-based exam or working on projects governed by the 2023 Code, this is the appropriate edition to have on hand.
Absolutely. It can be a valuable study resource for exams based on the NEC. The chapter review questions give you opportunities to check your understanding as you work through the material, while the straightforward explanations help you learn how to interpret and apply Code requirements instead of relying solely on memorization. This makes it useful both for exam preparation and for building practical Code knowledge.
