Category: Electrician careers, career change & licensing

NEC 392 Cable Trays for Apprentices: Tray Types, What Can Go in a Tray, Fill for Large Cables and Bonding

What Article 392 says about cable trays: ladder, ventilated and solid bottom trays, which wiring methods are allowed, installing the tray as a complete system, cable fill for large multiconductor…

Updated 2026-10-12 · Read the article ›

NEC 225 for Apprentices: Feeding a Detached Garage or Second Building, Disconnects, Four-Wire Feeders and Grounding

How Article 225 treats a feeder to a detached garage, shop or second building: one supply per building, the disconnect at the building, four-wire feeders with the neutral kept off…

Updated 2026-10-12 · Read the article ›

Texas First-Year Apprentice Electrician: The License, Supervision, Hours and the Skills to Learn in Year One

What year one looks like for a Texas electrical apprentice: the TDLR apprentice license and its $20 fee, who supervises you, how your hours build toward the 8,000 needed for…

Updated 2026-10-19 · Read the article ›

NEC 600, 620 and 670 for Apprentices: Sign Circuits, Elevator Disconnects and Industrial Machinery Supply Conductors

What the NEC adds for electric signs, elevators and industrial machinery: the sign outlet at each tenant entrance, sign disconnects, elevator disconnects and feeder demand factors, and sizing the supply…

Updated 2026-10-12 · Read the article ›

NEC 500 Hazardous Locations for Apprentices: Classes, Divisions, Groups, Temperature Codes and Conduit Seals

How to read a hazardous location: Class I, II and III, Division 1 and 2, gas and dust groups, Zone classifications, temperature codes, protection techniques, threaded conduit and seals, with…

Updated 2026-10-17 · Read the article ›

NEC 445 Generators for Apprentices: Conductor Sizing at 115%, Disconnects, Portable GFCI and Standby Transfer Equipment

How the NEC treats generators: sizing conductors from the generator terminals at 115% of nameplate current, the disconnect, GFCI on portable generator receptacles, and what Article 702 adds for optional…

Updated 2026-10-12 · Read the article ›

NM Cable, MC Cable and Flexible Cords for Apprentices: NEC 334, 330 and 400 Support, Bends, Ampacity and Cord Limits

How to install NM and MC cable and when flexible cord is allowed: support spacing, bend radius, the 60°C ampacity limit on NM, cord uses that are not permitted, splices…

Updated 2026-10-12 · Read the article ›

Multimeter Measurements for Apprentices: Test Before Touch, Receptacle Readings, Clamp Amps, CAT Ratings and Voltage Drop Under Load

The meter readings a first-year apprentice takes on the job: proving a tester before and after, reading a receptacle hot to neutral to ground, clamping one conductor, choosing a CAT…

Updated 2026-10-19 · Read the article ›

Available Fault Current for Apprentices: The Point-to-Point Method, Interrupting Ratings and Service Marking

How available fault current drops along a feeder, how to run the point-to-point calculation step by step, and why interrupting ratings, short-circuit current ratings and the service marking rule depend…

Updated 2026-10-12 · Read the article ›

Single-Phase AC Basics for Apprentices: RMS and Peak Voltage, 120/240 V Split-Phase, Neutral Current and Power Factor

The AC ideas every first-year apprentice uses: 60 Hz, RMS versus peak voltage, how a 120/240 V split-phase service works, why the neutral carries only the difference, watts versus volt-amperes,…

Updated 2026-10-12 · Read the article ›