Mike Holt first impressions (review 2)

Why I tried Mike Holt

Mike Holt is the name everyone drops when you ask about NEC training. Books, videos, exam prep, continuing education. I've been doing residential and light commercial for nine years and I keep hitting the same wall: I know the code well enough to pass inspection, not well enough to argue with one. So I picked up the Mike Holt 2023 Understanding the NEC Volume 1 and the companion video access to see if it would close the gap.

This is first impressions after about three weeks of using it on real jobs. Service upgrades, a small commercial tenant fit-out, and one ugly panel swap where the existing grounding electrode system was a guess at best. I wanted to know if it actually helps in the truck, not just in a classroom.

What it does well

The illustrations are the selling point and they earn it. Bonding and grounding (NEC 250) is where most guys, including me, get fuzzy. Holt's diagrams of the grounded conductor, equipment grounding conductor, and grounding electrode conductor finally made the difference between 250.24(A)(5) and 250.142 click. If you learn visually, this is the strongest material on the market.

The exam-style questions at the end of each section are good practice. They force you to actually open the book and trace the article, not just memorize an answer. After a week I noticed I was navigating the codebook faster on the job, which was the whole point.

• Strong coverage of NEC 250 grounding and bonding
• Clear breakdown of NEC 310 conductor ampacity tables and adjustment factors
• Solid treatment of NEC 240 overcurrent protection, including the 6-disconnect rule and tap rules
• Practice questions that map directly to article numbers

Tip: when you read a Holt explanation, immediately flip to the actual NEC article he's citing and read it cold. The book teaches you the why, but inspectors quote the actual text. You need both.

Where it falls short on the job

It is a textbook. That sounds obvious but it matters. When I'm standing in front of a panel at 2pm trying to confirm whether a 60A feeder to a detached garage needs an equipment grounding conductor or can ride on the grounded conductor under the old rules, I do not want to flip through 400 pages or scrub a video. I want the answer in 15 seconds with the citation. NEC 250.32(B), by the way, and no, you cannot do the old four-wire-not-required trick on new installs.

The video format is the same problem amplified. Great for a Saturday morning with coffee. Useless on a roof in July. There's no quick search, no tap-to-jump-to-article, no offline lookup that respects the way the day actually goes.

Price and what you actually get

The Volume 1 textbook plus video access is in the $200 to $300 range depending on the bundle, and Volume 2 (NEC 500 onward, hazardous locations, special equipment) is another spend on top. Add the exam prep package and you are easily over $500 before continuing education credits. For a guy preparing for a Master's exam, that math works. For a journeyman who just wants faster code answers in the field, it's a lot.

The Mike Holt forum is a real bonus people don't talk about enough. Post a real question with photos and you'll get an answer from someone who has actually pulled the permit. That's worth something the book itself can't deliver.

1. Textbook plus illustrations: excellent learning, slow reference
2. Video library: good for studying, not for the truck
3. Forum community: surprisingly useful, free to read
4. Exam prep: well-targeted if that's your goal

How it compares to a code reference app

This is where I have to be straight. Mike Holt is teaching material. It teaches you the code. An app like Ask BONBON is reference material. It answers a specific question on a specific job. They are not the same product and pretending they are does both a disservice.

If you don't understand why NEC 210.8(A) keeps expanding GFCI requirements every cycle, Holt will explain it and you'll come out smarter. If you're standing in a kitchen remodel and need to confirm whether the dishwasher receptacle in 2023 needs GFCI under 210.8(D), you want a search box, not a chapter. I've started using both, Holt at home, an app on the job, and stopped trying to make either one do the other's job.

Tip: keep your code learning and your code lookup separate. Study one article a week deeply on your own time. Use a fast lookup tool when the meter is running. Mixing the two means you do neither well.

Bottom line after three weeks

Mike Holt is the gold standard for learning the NEC. The illustrations alone justify the textbook if grounding and bonding are a weak spot for you, and they are for most of us. I'll be working through Volume 1 cover to cover this year and I expect my code knowledge to be measurably better for it.

It is not a field reference and it was never trying to be. Anyone marketing Holt as a replacement for a fast in-pocket code tool is selling you something. Buy it for what it is, the best teaching material in the trade, and pair it with whatever lookup tool actually fits in your pocket and works without signal in a basement.