Mike Holt speed test (review 2)

The Setup

Mike Holt's material is the gold standard for NEC training. Books, videos, illustrated guides, code change courses. If you took a continuing ed class in the last twenty years, odds are Mike's name was on the cover. His free online code questions and the Mike Holt forum have helped a generation of electricians pass the journeyman and master exams.

But training material and a field reference tool are different animals. This is a speed test, not a curriculum review. The question: when I'm standing on a ladder with the drill in one hand and the phone in the other, how fast can Mike Holt's resources answer a code question compared to what I actually use on the truck?

Three test questions, timed from the moment I typed the first character to the moment I had the answer I could act on.

Test 1: GFCI Requirements in a Commercial Kitchen

The scenario: prep sink in a small restaurant back-of-house, receptacle within six feet. I need to confirm GFCI applies and whether the 2023 cycle changed anything for the specific occupancy.

Searching Mike Holt's site for "GFCI commercial kitchen" pulled up forum threads, a code change video from 2020, and a PDF illustrated guide excerpt. Good content. Lots of it. I spent about two minutes reading before I got to the current rule citation for NEC 210.8(B) and its sink proximity language. The answer was there, but it was buried in context meant for someone studying, not someone troubleshooting.

Time to actionable answer: 2 minutes 14 seconds.

Test 2: Conductor Ampacity for a 400A Feeder

Parallel run, 75 degree C terminations, THHN in PVC underground, three sets. I want the minimum conductor size per NEC 310.16 with the parallel conductor rules from 310.10(G).

Mike's tables in the Understanding the NEC Volume 2 book are clean and well-marked. On paper. But I don't carry the book in the service van and the digital version I accessed required logging in, loading the PDF, and scrolling to the right page. The math itself is straightforward once you're there. Getting there was the problem.

Tip: if you're pricing out parallel feeders on the fly, confirm your terminations are rated 75C or 90C before you size conductors. A 90C ampacity on a 75C lug is a fail waiting for an inspector.

Time to actionable answer: 3 minutes 41 seconds. Most of that was navigation, not reading.

Test 3: Working Space in Front of a Panel

NEC 110.26(A)(1), Condition 2. Panel is 240V, grounded parts on the opposite wall. I need the clear working depth number without second-guessing it.

This is where Mike's material shines in a classroom. The illustrated guide has a drawing that makes the three conditions crystal clear. But the speed test is not about comprehension, it's about retrieval. I searched, I clicked, I found the right graphic, and I had my answer at three feet.

Time to actionable answer: 1 minute 08 seconds. The fastest of the three, because the illustrated guide is organized by article and the search landed close.

What Mike Holt Does Well

The depth is unmatched. If you want to understand why a rule exists, where it came from, what the 2020, 2023, and 2026 cycles changed, and how it compares across jurisdictions, Mike's ecosystem delivers. The forum alone has twenty plus years of working electricians hashing out edge cases. That institutional memory is real and valuable.

For apprentices studying for the journeyman, for masters prepping the business exam, for CEUs, it's hard to beat. The video production is clean, the illustrations are accurate, and Mike himself is a credible voice who has been around the trade for decades.

• Deep code explanations with historical context
• Strong illustrated guides for visual learners
• Active forum with experienced electricians
• Complete exam prep pipeline
• Code change courses that track cycle to cycle

Where It Falls Short for Field Use

Speed. That's the whole review. Mike Holt's resources were built for a desk, a highlighter, and time to read. They were not built for a bucket truck at 4:47 PM when the inspector is circling and you need to know if NEC 250.122 requires you to upsize the EGC because you upsized the ungrounded conductors for voltage drop.

Search inside his site returns a lot of results, including a lot of older material that may or may not reflect the current cycle. Forum answers are helpful but they are opinions, not citations. The paid content requires a login, which on a cold morning with gloves on and 4G service in a basement is its own obstacle.

Tip: if you're studying for an exam, buy the Mike Holt materials. If you're wiring for a living, you need something faster at your fingertips during the workday.

The Verdict

Mike Holt is a reference library. A great one. But a library is not a lookup tool, and the test results show it. Three questions, over seven minutes of total lookup time, most of it spent navigating rather than reading the actual rule.

For the truck, you want something that returns the article text, the applicable conditions, and the exception in under thirty seconds. For the classroom, for the apprenticeship, for the exam, Mike Holt is still the name on the cover for a reason. Different tools, different jobs. Keep both in your kit.