ICC E1 RESIDENTIAL ELECTRICAL INSPECTOR EXAM
Complete Study Guide (150+ Questions)
Multiple Choice with Answers & Rationales
Latest Update Rated A+
EXAM OVERVIEW
The ICC E1 Residential Electrical Inspector certification is
one of the four prerequisite exams required for the R5
Residential Combination Inspector (RCI) designation .
This certification validates proficiency in inspecting
electrical systems in one- and two-family dwellings,
townhouses, and their accessory structures .
Feature Details
Primary 2024 International Residential Code (IRC), 2023
References NFPA National Electrical Code (NEC)
Number of
60
Questions
,Feature Details
Time Allowed 2 hours (120 minutes)
Format Open Book, Multiple Choice
Passing Score 70%
PRONTO remote proctoring or in-person test
Testing Options
centers
Exam Content Areas :
• General Requirements (10%)
• Services (17%)
• Branch Circuit and Feeder Requirements (28%)
• Wiring Methods and Power/Lighting Distribution
(21%)
• Devices, Lighting Fixtures, and Appliances (19%)
• Swimming Pools and Similar Installations (5%)
SECTION 1: GENERAL REQUIREMENTS (Questions 1-25)
,1. What is the minimum working space depth required
in front of electrical equipment operating at 600 volts or
less?
A) 24 inches
B) 30 inches
C) 36 inches
D) 48 inches
Answer: B) 30 inches
Rationale: NEC 110.26(A)(1) requires a minimum working
space depth of 30 inches (762 mm) in front of electrical
equipment likely to require examination, adjustment,
servicing, or maintenance while energized .
2. A 20-ampere branch circuit requires a receptacle with
what ampere rating?
A) 15 amperes
B) 20 amperes
C) 15 or 20 amperes
D) Any rating is acceptable
Answer: C) 15 or 20 amperes
, Rationale: NEC 210.21(B)(3) permits a 15-ampere or 20-
ampere receptacle on a 20-ampere branch circuit. A 15-
ampere receptacle is allowed as long as there are
multiple receptacles on the circuit .
3. Where conductor material is not specified in the
code, the material given should be assumed to be:
A) Copper
B) Aluminum
C) Copper-clad aluminum
D) Either copper or aluminum
Answer: A) Copper
Rationale: Unless otherwise specified, the Code assumes
copper conductors. Aluminum conductors have specific
sizing and termination requirements .
4. Where installed in raceways, conductors of size _____
AWG and larger must be stranded.
A) 14
B) 12
Complete Study Guide (150+ Questions)
Multiple Choice with Answers & Rationales
Latest Update Rated A+
EXAM OVERVIEW
The ICC E1 Residential Electrical Inspector certification is
one of the four prerequisite exams required for the R5
Residential Combination Inspector (RCI) designation .
This certification validates proficiency in inspecting
electrical systems in one- and two-family dwellings,
townhouses, and their accessory structures .
Feature Details
Primary 2024 International Residential Code (IRC), 2023
References NFPA National Electrical Code (NEC)
Number of
60
Questions
,Feature Details
Time Allowed 2 hours (120 minutes)
Format Open Book, Multiple Choice
Passing Score 70%
PRONTO remote proctoring or in-person test
Testing Options
centers
Exam Content Areas :
• General Requirements (10%)
• Services (17%)
• Branch Circuit and Feeder Requirements (28%)
• Wiring Methods and Power/Lighting Distribution
(21%)
• Devices, Lighting Fixtures, and Appliances (19%)
• Swimming Pools and Similar Installations (5%)
SECTION 1: GENERAL REQUIREMENTS (Questions 1-25)
,1. What is the minimum working space depth required
in front of electrical equipment operating at 600 volts or
less?
A) 24 inches
B) 30 inches
C) 36 inches
D) 48 inches
Answer: B) 30 inches
Rationale: NEC 110.26(A)(1) requires a minimum working
space depth of 30 inches (762 mm) in front of electrical
equipment likely to require examination, adjustment,
servicing, or maintenance while energized .
2. A 20-ampere branch circuit requires a receptacle with
what ampere rating?
A) 15 amperes
B) 20 amperes
C) 15 or 20 amperes
D) Any rating is acceptable
Answer: C) 15 or 20 amperes
, Rationale: NEC 210.21(B)(3) permits a 15-ampere or 20-
ampere receptacle on a 20-ampere branch circuit. A 15-
ampere receptacle is allowed as long as there are
multiple receptacles on the circuit .
3. Where conductor material is not specified in the
code, the material given should be assumed to be:
A) Copper
B) Aluminum
C) Copper-clad aluminum
D) Either copper or aluminum
Answer: A) Copper
Rationale: Unless otherwise specified, the Code assumes
copper conductors. Aluminum conductors have specific
sizing and termination requirements .
4. Where installed in raceways, conductors of size _____
AWG and larger must be stranded.
A) 14
B) 12
