Journeyman Electrician Theory

6 states · 56 open-book study guides — every explanation cites the exact NEC article or table

Free full-length theory content for the exams we cover. The NEC 2026 chapters serve Texas (NEC Knowledge & Calculations), Washington, Massachusetts (Part I & Part II Applied, including the 527 CMR 12.00 amendments), Colorado, Minnesota and Oregon. Washington's Section B chapter covers the state's own laws and rules (RCW 19.28 and WAC 296-46B), and Oregon's chapters follow the Oregon Electrical Specialty Code. Each chapter is written for the open-book format — learn how to navigate the code, find the article, and apply the table.

Texas

Texas licensing guide

Calculations

1Dwelling & Load Calculations 2Conductor Sizing & Ampacity 3Voltage Drop & Conductor Adjustments 4Box, Raceway & Conduit Fill 5Motors, Transformers & Overcurrent Protection 6NEC 2026 Load Calculations (Texas)

NEC Knowledge

1General Requirements & Code Administration 2Wiring & Protection 3Wiring Methods & Materials 4Equipment for General Use 5Special Occupancies 6Special Equipment 7Special Conditions & Communications 8Electrical Theory & Safety

Washington

Washington licensing guide

Section B — Washington Codes

1Washington Laws & Rules (RCW 19.28, WAC 296-46B)

Section A — NEC & Theory

1NEC 90 — Introduction (Washington)2NEC 100-110 — General Requirements (Washington)3NEC 200-225, 242 — Wiring & Protection (Washington)4NEC 230 — Services (Washington)5NEC 240 — Overcurrent Protection (Washington)6NEC 250 — Grounding & Bonding (Washington)7NEC 300-398 — Wiring Methods (Washington)8NEC 400-427, 455-480 — Electrical Equipment (Washington)9NEC 430-450 — Motors, HVAC, Generators & Transformers (Washington)10NEC 495 — Equipment over 1000 Volts (Washington)11NEC 500-516 — Hazardous Locations (Washington)12NEC 517-590 — Special Occupancies (Washington)13NEC 600-695 — Special Equipment (Washington)14NEC 700-702 — Emergency & Standby Systems (Washington)15NEC 705-780 — Special Conditions (Washington)16NEC 800-830 — Communication Systems (Washington)17General Trade Knowledge & Theory (Washington)

Massachusetts

Massachusetts licensing guide

Part I — NEC Knowledge

9Alarm Systems & NFPA 72 10Photovoltaic Systems 11Energy Storage Systems 12NEC 2026 Load Calculations (Massachusetts)

Part II — Applied

1Circuit Calculations (Ohm's Law)2Electrical Schematics & Plans 3Materials & Components 4Troubleshooting & Testing 5Massachusetts Amendments (527 CMR 12.00)6Licensing Laws & Regulations

Colorado

Colorado licensing guide

Journeyman

9NEC 2026 Load Calculations (Colorado)

Minnesota

Class A Journeyworker

1Introduction 2General 3Wiring and Protection 4Wiring Methods and Materials 5Equipment for General Use 6Special Occupancies 7Special Equipment 8Specific Conditions and Systems 9Communication Systems 10Tables 11Applied Electrical Theory and Calculations

Oregon

General Journeyman

1General (Oregon)2Wiring and Protection (Oregon)

Ready to test what you just read?

Practice with official-blueprint exam simulations, code-cited explanations and the AI tutor — free first chapter of every exam.

Try Free Questions Create Free Account