Everything you need for the E1 Residential Electrical Inspector exam — based on the 2024 International Residential Code® (IRC)
6-hour structured review covering Branch Circuit and Feeder Requirements, Wiring Methods and Power and Lighting Distribution, Devices, Lighting Fixtures, and Appliances, and more — weighted to match E1 exam percentages
Timed 60-question simulation matching the E1 exam format with detailed answer explanations
Digital flip-cards for key terms, code sections, and references from the 2024 International Residential Code® (IRC)
Listen-and-learn audio covering high-yield E1 topics for studying on the go
Color-coded tab system for the 2024 International Residential Code® (IRC) — find answers fast during your open-book exam
Insert sheets with key tables, formulas, and values from the 2024 International Residential Code® (IRC) for blank code book pages
6-8 week structured program prioritized by E1 category weights — heaviest topics first
Intensive pre-exam review focusing on the highest-weighted E1 topics: Branch Circuit and Feeder Requirements, Wiring Methods and Power and Lighting Distribution, Devices, Lighting Fixtures, and Appliances
Our study materials cover every category tested
Get a head start on your E1 Residential Electrical Inspector exam preparation with this preview of our comprehensive study guide. Sign up for full access to all study materials.
Use this guide the day before or morning of your exam for focused, intensive review
This review is designed for your final prep session right before taking the E1 exam. It focuses on the highest-value topics and most commonly tested electrical material.
Recommended Schedule:
Materials needed:
Branch circuits and feeders represent 28% of your exam - that's 17 out of 60 questions. This is your HIGHEST PRIORITY section. Master circuit requirements, ratings, overcurrent protection, and calculations, and you're nearly 1/3 of the way to passing.
Tab these NOW if you haven't:
CRITICAL: These are the most tested requirements!
Small Appliance Circuits (E3703.2):
Laundry Circuit (E3703.3):
Bathroom Circuit (E3703.4):
Garage Circuit:
Common Test Questions:
Exam Tip: Questions often describe a circuit serving multiple areas and ask if it's code-compliant. Check EXACTLY what the circuit serves. Small appliance circuits are VERY restrictive - countertops only!
MEMORIZE THIS TABLE - It's tested constantly!
Standard Branch Circuit Ratings:
| Circuit Rating | Min Wire Size (Cu) | Overcurrent Device | Max Outlet Load | Typical Use |
|---|---|---|---|---|
| 15-amp | 14 AWG | 15-amp breaker | 12 amps (80%) | General lighting |
| 20-amp | 12 AWG | 20-amp breaker | 16 amps (80%) | Kitchen, bath, laundry |
| 30-amp | 10 AWG | 30-amp breaker | 24 amps (80%) | Water heater, dryer |
| 40-amp | 8 AWG | 40-amp breaker | 32 amps (80%) | Electric range |
| 50-amp | 6 AWG | 50-amp breaker | 40 amps (80%) | Large range |
Copper Conductor Ampacity (60°C terminals):
Key Rules:
Common Test Questions:
Exam Tip: Many questions give you a load and ask for minimum circuit size. Calculate: Load ÷ 0.80 (if continuous) = Required circuit rating. Then select wire size from table.
Studying for similar exams? These certifications share content with the E1 exam.
Created by Levi Mittag — a Certified Building Official, Field Inspection Supervisor, and Lean Six Sigma Black Belt with 19 ICC certifications and 26 years in the building industry.
7 days free, then $12/mo. All 27 exams included. No credit card required.
Not just practice questions — a complete study system with audio, tabbing, and strategy.
Built by an active supervisor who uses these methods to train his own inspection team.