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
Voltage Drop Is a Recommendation, and That Is Why Nobody Agrees
The three and five percent figures everybody quotes sit in informational notes, which are not enforceable. Here is where they came from, where voltage drop is genuinel...
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Demand Factors Exist Because Nobody Runs Everything at Once
Texas passes about one in five candidates on the calculations paper. The failure is rarely arithmetic. It is method, table notes and the clock, and all three can be fi...
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The GFCI List Keeps Growing Because the Injury Data Kept Coming
Ground-fault protection started with swimming pools and now covers most of a house. The expansion was not ambition. Each cycle added the place where people were still ...
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Arc Flash on a 200-Amp Service Is Not an Industrial Problem
Most arc-flash material is written for plants. Here is what applies to a 200-amp service, what NFPA 70E actually asks of a small shop, and why low voltage is not low r...
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Torque Is a Code Requirement Because Loose Terminations Start Fires
A termination is a mechanical joint carrying current, and its resistance depends on how hard it is squeezed. That is the entire reason a manufacturer's torque value be...
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A Study Order That Matches How the Exams Actually Fail People
Apprentice to master, in the order that matches the published pass rates: theory first, then code navigation, then calculations under a clock, then the business paper ...
Read more →Code reasoning, in plain language.
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