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NEC Article 690 solar PV basics: the 600 V dwelling limit, Table 690.7(A) cold-weather voltage, the 156% current rule, 690.12 rapid shutdown, the 705 120% rule, and worked practice questions.
How to apply to the Houston JATC: eligibility, the $30 money-order fee, required documents, the TDLR apprentice license, the aptitude test and the new online application from November 2026.
The best NEC code app depends on the job: NFPA LiNK for the full code text, NFPA free access for the 2026 NEC, Ugly's and Calc Elite for field reference. Prices and editions checked October 2026.
Is being an electrician hard? Yes, in five ways: physical work, math, the NEC, safety and schedule. What each is really like and how it gets easier.
Journeyman vs master electrician: what each license allows, experience by state, how the exams differ, pay, and who pulls the permit.
How long does it take to become an electrician? 4–5 years to journeyman (~8,000 hours), about 6–7 to master. Stage-by-stage timeline and state hours.
How to bend conduit: the marks on a hand bender, offset multipliers and shrink, three-point and four-point saddle bends, stub-up 90s and the NEC 358.26 360-degree rule.
Electrician license reciprocity by state: which states have agreements according to the Texas, South Dakota and Minnesota boards, the conditions every agreement shares, fees, and states with no statewide license.
Electrical license renewal explained: electrician CE hours by state, code-update requirements, approved providers, deadlines and how to renew without a lapse.
Wire gauge chart for copper and aluminum, 14 AWG to 500 kcmil: ampacity from NEC Table 310.16, diameter and resistance from Chapter 9 Table 8, and wire size by breaker.
NEC 250.90 through 250.102 explained section by section: the four bonding jumpers, Table 250.102(C)(1) vs Table 250.122, and when a locknut is not a bond.
400-amp service wire size from NEC Table 310.12: 400 kcmil copper or 600 kcmil aluminum, the 83 % rule, two-set Class 320 builds, and the non-dwelling answer.
