Category: Electrician careers, career change & licensing

NEC 695 Fire Pumps for the Journeyman Exam: Why the Rules Keep the Pump Running and How to Find Them

How 2026 NEC Article 695 keeps a fire pump running: reliable power, protection that rides through starting current, fire-protected conductors.

Updated 2026-10-17 · Read the article ›

NEC 547 Agricultural Buildings for the Journeyman Exam: Why Barns Are Different and How the Equipotential Plane Is Bonded

How 2026 NEC Article 547 treats barns and livestock buildings: why dust and moisture change the wiring, and how the equipotential plane is bonded.

Updated 2026-10-12 · Read the article ›

NEC 250.50 Grounding Electrode System for the Journeyman Exam: Which Electrodes Count, the 25-Ohm Rod Rule and the Install Numbers

Look up the 2026 NEC grounding electrode system: what 250.50 bonds, the 250.52 electrode list, the 25 ohm rule, plate and ring numbers and GEC protection.

Updated 2026-10-12 · Read the article ›

NEC 344, 352 and 358 for the Journeyman Exam: RMC, PVC and EMT Support, Bend, Expansion and Size Rules Side by Side

Compare 2026 NEC rules for RMC (344), PVC (352) and EMT (358): support spacing, the 360 degree bend limit, PVC expansion worked out and minimum sizes.

Updated 2026-10-12 · Read the article ›

NEC 210.8 GFCI and 210.12 AFCI for the Journeyman Exam: How to Read the Voltage, Amp and Location Limits

2026 NEC 210.8 GFCI and 210.12 AFCI lookups: dwelling vs other locations, the 150 V, 50 A and 100 A limits, kitchens, garages and dormitories.

Updated 2026-10-12 · Read the article ›

NEC Table 250.66 and Table 250.122 for the Journeyman Exam: How to Look Up GEC and EGC Sizes Step by Step

Look up the GEC in Table 250.66 and the EGC in Table 250.122: which input each table uses, parallel sets, upsized wire and worked exam-style answers.

Updated 2026-10-12 · Read the article ›

Three-Phase Power Calculations for Apprentices: Where 1.732 Comes From, kVA to Amps and Wye vs Delta

How to calculate three-phase current, kVA and kW with the 1.732 factor, how line and phase values differ in wye and delta systems, and worked 208 V and 480 V…

Updated 2026-10-12 · Read the article ›

Ohm’s Law, Power and Series-Parallel Circuits for Apprentices: The Four Formulas and How Exam Questions Use Them

Ohm's law and the power formulas explained for electrical apprentices, with worked series, parallel and heater-on-the-wrong-voltage examples and the mistakes that cost points on the Texas Journeyman exam.

Updated 2026-10-12 · Read the article ›

NEC 700, 701 and 702 for Apprentices: Emergency, Legally Required and Optional Standby Systems and Their Transfer Switches

How to tell emergency, legally required standby and optional standby systems apart in the 2026 NEC, what each requires for transfer equipment, wiring, testing and signs, and a worked battery…

Updated 2026-10-12 · Read the article ›

NEC 690 PV Calculations for Apprentices: Cold-Weather String Voltage, the 125% Current Factors and Rapid Shutdown Limits

Worked 2026 NEC Article 690 calculations for solar PV: maximum string voltage with Table 690.7(A) or the module coefficient, maximum circuit current, the 156.25% conductor check, inverter output breakers, and…

Updated 2026-10-12 · Read the article ›