MHE Field Notes
Plain-language writing on the code, the exams and the reasoning behind the rules — written for people already on the tools, not for a classroom.
MHE Field Notes
Why the Calculations Paper Fails Four Candidates in Five
Texas publishes its exam pass rates and the journeyman calculations paper sits at 20.56%. The people failing it can already do the work. What they cannot do is do it a...
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Why the Box Fill and Conduit Fill Numbers Are What They Are
Box fill and conduit fill are not about whether the wire physically fits. They are heat calculations and pull-damage calculations wearing the costume of a space calcul...
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Learning to Navigate the Code Book Under a Clock
An open-book exam is only generous if you can find things. The index speaks code and you speak job site, and that gap costs more candidates their license than any gap ...
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What an AFCI Is Actually Listening For When It Trips
The most complained-about device in the trade is doing something more specific than most of us were told. Understanding the signature it hunts explains almost every nu...
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The Ground Rod Will Not Trip Your Breaker
Grounding and bonding are two different jobs sharing one word, and the confusion is built into the vocabulary. Here is the arithmetic that separates them, and a fatali...
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Shared Neutrals, Handle Ties, and the Circuit That Is Not Dead
A multiwire branch circuit is efficient, legal and entirely reasonable until somebody kills one breaker and assumes the white wire is safe. That assumption is what the...
Read more →Code reasoning, in plain language.
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