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Month: October 2026

NEC Article 240 Fuses and Circuit Breakers for the Journeyman Exam: Plug Fuses, Type S, Interrupting Ratings and Slash-Rated Breakers

2026 NEC Article 240 fuses and breakers: plug fuse limits, Edison base and Type S, cartridge fuses, interrupting ratings, slash ratings and series ratings.

Updated 2026-10-15 · Read the article ›

NEC Article 230 Underground Service Conductors and Service-Entrance Conductors for the Journeyman Exam: Size, Wiring Methods and Protection

2026 NEC Article 230 underground service and service-entrance conductors: minimum size, one set per service, approved wiring methods, protection and support.

Updated 2026-10-15 · Read the article ›

NEC 210.4 Multiwire Branch Circuits for the Journeyman Exam: Shared Neutral Current, Handle Ties and Grouping

2026 NEC 210.4 multiwire branch circuits: shared neutral current math, simultaneous disconnect, handle ties, line-to-neutral loads and grouping.

Updated 2026-10-15 · Read the article ›

NEC 680 Spas, Hot Tubs and Fountains for the Journeyman Exam: Emergency Switch, Indoor Distances, GFCI and Bonding

2026 NEC 680.40 to 680.54: spa emergency switch, outdoor and indoor hot tub rules, receptacle and luminaire distances, GFCI, and fountains.

Updated 2026-10-15 · Read the article ›

NEC 230.24 for the Journeyman Exam: Overhead Service Clearances, Point of Attachment and Service Masts

2026 NEC 230.9, 230.24 and 230.26 to 230.29: clearances over roofs and grade, distance from windows, point of attachment height, service masts and drip loops.

Updated 2026-10-15 · Read the article ›

NEC 300.25 Ducts and Plenums for the Journeyman Exam: Firestopping, Ceiling Support and Air-Handling Spaces

2026 NEC 300.13, 300.22, 300.23 and 300.25: support above suspended ceilings, induced currents, firestopping, and wiring in ducts and plenums.

Updated 2026-10-15 · Read the article ›

NEC 250.20 for the Journeyman Exam: Which Systems Must Be Grounded, Ungrounded Systems and the Main Bonding Jumper

2026 NEC 250.20 to 250.36: which AC systems must be grounded, which conductor is grounded, ungrounded system marking, bonding jumpers and HRG systems.

Updated 2026-10-15 · Read the article ›

NEC 410 Recessed Luminaires and Track Lighting for the Journeyman Exam: Clearances, Insulation, Tap Conductors and Supports

2026 NEC 410.115 to 410.155: recessed luminaire temperature, 1/2 in. and 3 in. clearances, IC rating, 18 in. to 6 ft taps, and track supports.

Updated 2026-10-15 · Read the article ›

NEC 230.90 and 230.95 for the Journeyman Exam: Service Overcurrent Protection and Ground-Fault Protection of Equipment

2026 NEC 230.90, 230.91 and 230.95: where service overcurrent devices go, the two to six device rule, and which services need ground-fault protection.

Updated 2026-10-15 · Read the article ›

NEC 210.62 to 210.65 for the Journeyman Exam: Show Windows, HVAC Service Receptacles, Guest Rooms and Meeting Rooms

2026 NEC 210.60 to 210.65: show window outlets every 6 ft, HVAC service receptacle within 25 ft, hotel guest rooms and meeting room floor outlets.

Updated 2026-10-15 · 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.