Mike Holt what they do better (review 3)

Who Mike Holt Is, And Why Electricians Trust Him

Mike Holt has been teaching the NEC for over 40 years. His books, videos, and code courses are on the shelf of almost every journeyman I know. When an apprentice asks me how to actually learn the code, I send them to Mike Holt first.

That track record matters. Ask BONBON is a fast reference tool built for the field, but I am not going to pretend we compete with Mike Holt on everything. Here is an honest rundown of where his stuff beats ours, and where you should be reaching for his material instead of a phone app.

Depth Of Explanation On Grounding And Bonding

Article 250 is where most electricians get tripped up, and it is where Mike Holt shines. His Understanding the NEC Volume 2 breaks down grounding electrode conductors, equipment grounding, bonding jumpers, and the difference between a grounded conductor and a grounding conductor in a way that actually sticks. He uses full color illustrations that show current paths, fault scenarios, and what happens when you get it wrong.

A quick lookup tool can tell you that NEC 250.66 sizes the grounding electrode conductor, and that NEC 250.122 sizes the equipment grounding conductor. What it cannot do in three seconds is explain why those two tables exist, why they are different, and why using the wrong one on a service can kill somebody.

If you are studying for your journeyman or master exam and grounding is kicking your tail, buy the Mike Holt Grounding vs Bonding book before you buy anything else. It is the single best 250 resource in print.

Structured Learning Paths For Apprentices

Mike Holt's curriculum is built as a progression. Year one apprentices start with basic electrical theory and NEC fundamentals. By year four they are working through calculations, motors, transformers, and the harder parts of Chapter 3 and Chapter 5. Each book has review questions, practice exams, and answer keys tied to specific code sections.

A reference app cannot replace that. When you are trying to pass a state exam or work through a JATC program, you need structured problem sets, not just a search bar. Here is where his material has no real substitute:

• Load calculations using NEC 220 (dwelling, multifamily, commercial)
• Motor circuit sizing under NEC 430 with overload, branch circuit, and feeder protection
• Voltage drop and conductor sizing under Chapter 9 Tables 8 and 9
• Transformer calculations and secondary conductor protection, NEC 240.21(C)
• Box fill, conduit fill, and derating exercises that show the full worked math

Video Instruction And Code Change Seminars

Every three years when the NEC updates, Mike Holt releases a code changes video and workbook. He walks through every significant revision, shows what the old text said, what the new text says, and explains the reasoning from the code making panel. For working electricians trying to stay current when their state adopts the 2023 or 2026 NEC, that is gold.

His video format also helps guys who learn better by watching than reading. If you have ever tried to read NEC 705 on interconnected power sources cold, you know what I mean. Watching somebody draw out a PV backfed breaker panel with a line side tap is a lot easier than parsing the code text on your own.

Community And Credibility In The Trade

Mike Holt has a forum that has been running for decades. Master electricians, inspectors, and engineers actually hang out there and answer questions. When you post a weird scenario, like a 120/240 three phase high leg delta feeding a panel with a neutral derived load, you get real answers from people who have wired it.

That kind of community does not exist around most electrical apps, including ours. The forum archive alone is a resource. If you search a tricky NEC question with "mike holt forum" on the end, you will usually find three electricians already argued about it and landed on the right answer with code citations.

Before you post a question, search the forum first. Nine times out of ten somebody already asked it in 2014 and got a better answer than you will get today.

Where A Reference App Still Fits

None of this means you toss your phone in the truck toolbox. On a live job, when you are up a ladder or kneeling in a panel, you do not need a 400 page book or a two hour video. You need to know right now whether a receptacle within 6 feet of a sink needs GFCI protection under NEC 210.8(A), or how far your working space clearance needs to be under NEC 110.26.

That is the split. Study with Mike Holt at home. Reference fast in the field. The two tools do different jobs, and pretending otherwise is dishonest.

1. Learning the code in depth, exam prep, code change training, go with Mike Holt.
2. Fast article lookups, working space checks, ampacity tables on the truck, use an app.
3. Grounding and bonding confusion, buy the book, no shortcuts.

Bottom Line

Mike Holt built the best NEC education material in the trade, and anybody telling you different is selling something. Ask BONBON is not trying to replace his books. We are trying to be the reference you reach for when the book is in the truck and the inspector is standing behind you.

Use both. Learn deep, look up fast. That is how you stop guessing and start wiring with confidence.