The calculations the Texas Journeyman exam actually tests — each one shows the worked formula and the NEC reference, not just an answer. Free, no signup.
Single- or three-phase, copper or aluminum, 14 AWG to 750 kcmil. Get volts dropped, % drop, and pass/fail against the 3% / 5% recommendations.
VD = K × I × L ÷ circular mils · NEC Ch. 9 Table 8Table 310.16 base ampacity, then derated for ambient temperature and conductor bundling — the full exam workflow, step by step.
NEC Table 310.16 · 310.15(B)(1) · 310.15(C)(1)Conduit fill (Ch. 9 Tables 1, 4, 5) and box fill (314.16) are next. Want one sooner? Tell us below.
The NEC formula + table cheat sheets behind these calculators, plus 50 free Texas Journeyman practice questions. No spam.
Prepping for the TDLR Journeyman exam? Drill 290+ NEC & calc questions.
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