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Articles 90 and 100 · free
How the NEC is built
Shall versus a note
Shall is mandatory. Informational notes explain and do not add a requirement. Chapter 9 tables and Annex C are for raceway fill. The chapters you live in on exam day are 1 through 4, then the special articles the question names.
Which edition
Texas journeyman exams use the 2026 NEC effective September 1, 2026. Ohio OCILB and Kentucky DHBC exams use the 2023 NEC. Where the article number moved, the lesson names both.