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 ›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 ›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 ›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 ›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 ›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 ›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 ›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 ›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 ›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 ›