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Month: October 2026

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 ›

Best Texas Journeyman Exam Prep Books 2026: 11 Books Compared

Disclosure: Tsai Electro publishes one of the books compared in this article and has a financial interest in its sales. […]

Updated 2026-10-17 · Read the article ›

How to Get a General Journey Level Electrician (01) Certificate in Washington (2026)

Short answer: Washington’s Department of Labor & Industries (L&I) issues a General Journey Level Electrician (01) certificate, not a license. […]

Updated 2026-10-11 · Read the article ›

How to Get a Journeyman Electrician License in Massachusetts (2026)

Short answer: The Board of State Examiners of Electricians issues the Massachusetts Journeyman Electrician license (certificate B). On the standard […]

Updated 2026-10-11 · Read the article ›

How to Get a Journeyman Electrician License in Wisconsin (2026)

Short answer: The Department of Safety and Professional Services (DSPS) issues the Wisconsin Journeyman Electrician license. You qualify with a […]

Updated 2026-10-11 · 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.