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NEC 660 X-Ray Equipment for the Journeyman Exam: Momentary and Long-Time Ratings, the 50 Percent Rule and Feeder Sizing

2026 NEC Article 660 X-ray equipment: momentary and long-time ratings, branch circuit and disconnect at 50 or 100 percent, feeder sizing and minimum wire sizes.

Updated 2026-10-12 · Read the article ›

NEC 504 Intrinsic Safety and 505 Zones for the Journeyman Exam: Control Drawings, Separation, Light Blue Wiring and Zone 0, 1 and 2

2026 NEC Articles 504 and 505: intrinsically safe circuits, control drawings, keeping IS wiring separate, light blue identification and Zone 0, 1 and 2.

Updated 2026-10-12 · Read the article ›

NEC 427 Pipeline and Vessel Heat Tracing for the Journeyman Exam: 125 Percent Branch Circuits, Ground-Fault Protection, Warning Labels and Disconnects

2026 NEC Article 427 heat tracing for pipelines and vessels: 125 percent continuous load, equipment ground-fault protection, caution labels and disconnects.

Updated 2026-10-12 · Read the article ›

NEC 411 Low-Voltage Lighting and 402 Fixture Wires for the Journeyman Exam: Listing, Where It Cannot Go, 18 AWG Minimum and Fixture Wire Ampacity

2026 NEC Articles 411 and 402: low-voltage lighting systems, listing and location limits, fixture wire minimum 18 AWG, fixture wire ampacity and tap rules.

Updated 2026-10-12 · Read the article ›

NEC 342 IMC and 360 Flexible Metallic Tubing for the Journeyman Exam: Where Each Is Allowed, Sizes, Bends and the 6-Foot Limit

2026 NEC Articles 342 and 360: where IMC and flexible metallic tubing are allowed, trade sizes, 360 degrees of bends, IMC supports and the 6-foot FMT limit.

Updated 2026-10-12 · Read the article ›

NEC 340 UF Cable for the Journeyman Exam: Where Underground Feeder Cable Can Go, the 11 Places It Cannot and Its 60°C Ampacity

2026 NEC Article 340 Type UF cable: direct burial and wet locations, the eleven uses not permitted, service entrance and sunlight traps, and 60°C ampacity.

Updated 2026-10-12 · Read the article ›

NEC 120 Commercial Load Calculation for the Journeyman Exam: Lighting VA per Square Foot, Receptacles, Show Windows and Kitchens

2026 NEC Article 120 commercial load calculation: lighting VA per square foot, 180 VA receptacles, the 10 kVA receptacle demand, show windows and kitchens.

Updated 2026-10-12 · Read the article ›

NEC 800 and 820 for the Journeyman Exam: Communications and CATV Cable Entering a Building, Clearances and Bonding

2026 NEC Articles 800 and 820: overhead and underground clearances, the 50 ft unlisted cable rule, 6 ft from lightning conductors and bonding at entry.

Updated 2026-10-12 · Read the article ›

NEC 610 Cranes and Hoists for the Journeyman Exam: Conductor Sizing From Nameplate Current and Disconnect Ratings

2026 NEC Article 610 cranes and hoists: conductors from motor nameplate current, the largest motion plus 50 percent rule and the 50/75 percent disconnect rule.

Updated 2026-10-12 · Read the article ›

NEC 525 Carnivals, Circuses and Fairs for the Journeyman Exam: Overhead Clearance, Ride Disconnects, Cords and GFCI

2026 NEC Article 525: 15 ft from overhead lines, a ride disconnect within sight and 6 ft of the operator, extra-hard usage cords, bonding sources and GFCI.

Updated 2026-10-12 · Read the article ›
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Not a licensed Professional Engineer in Texas or any U.S. state. Does not offer engineering services. Exam-prep education only.