Mike Holt reviews from electricians (review 7)

Why I Looked at Mike Holt in the First Place

I run service calls five days a week and pick up side jobs on weekends. My truck has a beat-up code book, a meter, and a phone that does most of my code lookups now. I tried Mike Holt because every apprentice I know mentions his name and every inspector I respect has one of his books on the shelf.

This is not a takedown. The man built a real company teaching the NEC, and his illustrations have helped thousands of guys pass exams. But there is a difference between studying for a test and pulling a panel cover at 4pm with a homeowner staring at you. That is the gap I want to talk about.

What Mike Holt Actually Sells

Mike Holt's business is training. Books, videos, exam prep, continuing education. The Understanding the NEC volumes are the flagship products, and they are good at what they do, which is walk you through articles with commentary and graphics. If you are studying for a journeyman or master exam, that material earns its price.

The catalog breaks down roughly like this:

• Understanding the NEC, Volume 1 (Articles 90 through 480 ish)
• Understanding the NEC, Volume 2 (Articles 500 and up, special occupancies and equipment)
• Grounding and Bonding, which is its own beast and probably the best single resource on Article 250
• Exam prep packages with practice questions and video
• Continuing education for license renewal

None of that is a job-site reference. It is education. Useful education, but you sit down with it at the kitchen table, not on a ladder.

Where It Shines

The grounding and bonding material is the part I keep going back to. Article 250 is the section that trips up more electricians than any other, and the illustrations Mike Holt's team puts together for grounding electrode systems, equipment grounding conductors, and the difference between grounded and grounding really do click. If you have ever argued with another electrician about whether a water pipe ground needs a supplemental electrode per NEC 250.53(D)(2), the book ends the argument.

Exam prep is the other strong area. The practice questions are written in the style the testing services actually use, and the answer explanations cite the article so you learn the code, not just the answer. I passed my master with a stack of his practice tests and zero regrets about the money spent.

Tip: if you are studying for an exam, do the practice questions twice. First open book, second closed book with a timer. The second pass is where the speed comes from, and speed is what kills people on the exam.

Where It Falls Short on the Job

Here is where reviews from working electricians get honest. Mike Holt's products are not built for the field. The books are heavy. The video courses are long. The website is a catalog, not a search tool. When I am standing in a crawlspace trying to figure out if a junction box for a sump pump receptacle needs GFCI protection under NEC 210.8(A)(5), I do not want a 40 minute video on dwelling unit receptacles. I want the rule, the exception if there is one, and the AHJ angle in 15 seconds.

The other thing that bugs me is the update cycle. The NEC changes every three years. Mike Holt updates his materials, but if you bought the 2020 set and your jurisdiction just adopted 2023, you are buying the whole stack again. That adds up fast for a guy paying out of pocket.

• Slow to search compared to a code lookup app
• Heavy to carry, and the truck copy gets destroyed in a year
• Cycle cost every code revision
• Designed for sit-down learning, not 30 second answers

Honest Comparison: Mike Holt vs a Field Reference

I use Mike Holt to learn and I use a code reference app to work. Those are different tools for different jobs, and pretending one replaces the other is how guys end up frustrated. If you are an apprentice or a guy preparing for a license exam, Mike Holt is probably the best money you will spend on your career. If you are a licensed electrician trying to answer a question on a service call, a searchable NEC reference on your phone wins every time.

The way I think about it: Mike Holt teaches you why 210.52(C) requires a receptacle within 24 inches of the end of a counter. A field app tells you the rule fast when the GC is asking why you are roughing in another box. Both have value. Neither is the other.

Tip: keep the Grounding and Bonding book in the truck even if you mostly use an app. When an inspector flags a service grounding issue, having the diagram in your hand to discuss with them carries weight a phone screen does not.

Bottom Line for Working Electricians

Mike Holt is a study tool. A good one. Buy it for exam prep, buy the Grounding and Bonding book regardless of what stage you are at, and use the videos when you have time to actually sit and watch. Do not expect it to replace a code book on the truck or a search tool on your phone.

The electricians I see getting the most out of Mike Holt are the ones who treat it like night school. They block out time, work through the volumes, and come out the other side genuinely better at the code. The ones who get frustrated are usually expecting it to do something it was never designed to do, which is answer a quick question while standing on a ladder.

Pick the right tool for the right moment. Mike Holt for the kitchen table. A fast NEC lookup for the panel cover at 4pm.