2026 ICC Commercial Electrical Inspector Practice Exam 100 Questions and Answers with Rationales.pdf

ICC Commercial Electrical Inspector


2026 ICC Commercial Electrical
Inspector Practice Exam 100 Questions
and Answers with Rationales
Section 1: Questions 1–40 (NEC Fundamentals + General
Inspection Principles)


1. The primary purpose of the NEC is to:
A. Design electrical systems
B. Provide minimum safety requirements
C. Replace local building codes
D. Certify electricians
Answer: B
Rationale: The NEC establishes minimum safety standards for electrical installations.




2. The NEC is published by:
A. OSHA
B. ICC
C. NFPA
D. ANSI
Answer: C
Rationale: The National Fire Protection Association publishes NEC as NFPA 70.




3. Electrical inspectors primarily enforce:
A. Manufacturer guidelines
B. NEC and adopted local codes
C. Utility company rules
D. Contractor preferences
Answer: B

, ICC Commercial Electrical Inspector

4. Which NEC chapter covers general requirements?
A. Chapter 1
B. Chapter 2
C. Chapter 3
D. Chapter 4
Answer: A




5. Voltage is defined as:
A. Flow of electrons
B. Electrical pressure
C. Resistance to flow
D. Power consumption
Answer: B




6. Current is measured in:
A. Volts
B. Watts
C. Amps
D. Ohms
Answer: C




7. Resistance is measured in:
A. Watts
B. Ohms
C. Volts
D. Amps
Answer: B




8. Ohm’s Law formula is:
A. P = VI
B. V = IR

, ICC Commercial Electrical Inspector

C. I = PR
D. W = VI²
Answer: B




9. Power formula is:
A. P = V/I
B. P = IR
C. P = VI
D. P = V + I
Answer: C




10. NEC requires equipment grounding to:
A. Increase voltage
B. Prevent shock hazards
C. Increase resistance
D. Reduce load
Answer: B




11. Grounding electrode system connects to:
A. Neutral only
B. Earth
C. Hot conductor
D. Transformer secondary only
Answer: B




12. Color of equipment grounding conductor:
A. White
B. Green or bare
C. Black
D. Red
Answer: B