Electrician Exam Study Guide

Prepare for your state Journeyman or Master Electrician licensing exam with a focused, comprehensive study companion built around the National Electrical Code®.

Electrician Study Guide organizes everything into ten exam content areas — General Knowledge & Definitions, Electrical Theory & Calculations, Services/Feeders/Branch Circuits, Grounding & Bonding, Overcurrent Protection, Wiring Methods & Materials, Equipment & Devices, Motors & Transformers, Special Occupancies & Equipment, and Safety & Code Compliance — so you study exactly what the exam tests.

FOUR WAYS TO STUDY
• 160+ flashcards — tap to flip, tagged by exam domain
• 120+ multiple-choice questions with worked explanations
• Term-matching game — pair 110+ key terms, in rounds of five
• Searchable glossary of 110+ terms and 40+ formulas

TOPICS COVERED
• Electrical theory: Ohm's law, series/parallel circuits, power factor, impedance, three-phase relationships
• Calculations: voltage drop, box fill, conduit fill, ampacity adjustment and correction, dwelling load calcs (standard and optional), range/dryer demand
• Services and branch circuits: service sizing, receptacle spacing and placement, GFCI/AFCI requirements, small-appliance circuits, clearances
• Grounding and bonding: electrode systems, GEC/EGC sizing (250.66, 250.122), main bonding jumper, separate structures, pools
• Overcurrent protection: 240.4(D), standard sizes, next-size-up, tap rules, selective coordination, interrupting ratings
• Wiring methods: burial depths, raceway support and fill, NM cable rules, conductor identification
• Motors and transformers: FLC vs. nameplate, overloads, 430.52 short-circuit protection, transformer currents and OCP
• Special occupancies: hazardous locations, pools, health care, agricultural buildings, EV charging, solar PV
• Safety: NFPA 70E arc-flash boundaries and PPE categories, lockout/tagout, OSHA requirements

Start free with a preview of every section. Unlock Premium with a one-time lifetime purchase or a weekly, monthly, or annual subscription — every option includes the entire question bank, glossary, and formula library.

OFFICIAL SOURCES
• OSHA — Electrical standards and safety (osha.gov): https://www.osha.gov/electrical
• eCFR — 29 CFR 1910 Subpart S, Electrical (ecfr.gov): https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1910/subpart-S
• U.S. Bureau of Labor Statistics — Electricians: licensing and training (bls.gov): https://www.bls.gov/ooh/construction-and-extraction/electricians.htm
• NFPA 70 — National Electrical Code (nfpa.org): https://www.nfpa.org/codes-and-standards/nfpa-70-standard-development/70

This app is an independent study aid and is not affiliated with, endorsed by, or sponsored by the National Fire Protection Association (NFPA) or any state licensing board. All trademarks are the property of their respective owners. Exam content and policies change over time — always verify current requirements with the official sources above. This is not a government app: it is not affiliated with, endorsed by, or operated by any government agency or licensing board, and it does not provide licensing, registration, or any other official government service.