Michigan Residential Electrician Exam
Questions and Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
Question 1
What is the primary purpose of the National Electrical Code (NEC)?
A. To establish utility billing rates
B. To regulate electrical equipment manufacturing
C. To provide practical safeguards for persons and property from electrical
hazards
D. To establish electrical contractor licensing fees
Rationale: The NEC establishes provisions intended to safeguard people and
property from hazards arising from the use of electricity. It is primarily an
installation safety standard rather than a utility-rate or licensing document.
Question 2
Which NEC chapter primarily contains requirements for branch circuits?
A. Chapter 5
B. Chapter 2
C. Chapter 7
D. Chapter 9
Rationale: NEC Chapter 2 covers wiring and protection, including branch circuits
under Article 210. Chapter 3 addresses wiring methods and materials, while
Chapters 5 and 7 address special occupancies and special conditions.
,Question 3
In a typical dwelling, what is the purpose of a circuit breaker protecting a branch
circuit?
A. To increase the available voltage
B. To provide a neutral connection
C. To reduce the grounding electrode resistance
D. To protect conductors against overcurrent
Rationale: Overcurrent protective devices such as circuit breakers protect
conductors from excessive current that could cause overheating and fire. They are
selected according to the circuit conductors and applicable load requirements.
Question 4
A 120-volt load draws 12 amperes. What is its approximate power?
A. 120 watts
B. 1,000 watts
C. 1,440 watts
D. 1,920 watts
Rationale: Power is calculated as P = V × I. Therefore, 120 volts × 12 amperes =
1,440 watts.
Question 5
Which conductor normally carries current back to the source on a 120-volt single-
phase branch circuit?
A. The grounded conductor
B. The equipment grounding conductor
C. The grounding electrode conductor
D. The bonding jumper
Rationale: The grounded conductor, commonly called the neutral in a typical
dwelling circuit, carries the return current from a 120-volt load to the source. The
,equipment grounding conductor normally carries current only during a fault
condition.
Question 6
What is the primary function of an equipment grounding conductor?
A. To carry normal neutral current
B. To increase circuit voltage
C. To provide a separate service conductor
D. To provide a low-impedance fault-current path
Rationale: The equipment grounding conductor provides a conductive path for
fault current back to the source so that the overcurrent protective device can
operate promptly.
Question 7
Which wiring method is commonly used for residential branch circuits where
cable is permitted?
A. Rigid metal conduit only
B. Nonmetallic-sheathed cable
C. Busway
D. Electrical metallic tubing only
Rationale: Nonmetallic-sheathed cable, such as Type NM cable, is widely used for
permitted residential wiring applications. Its use remains subject to
environmental, physical-protection, and other NEC requirements.
Question 8
A 20-ampere branch circuit is intended to supply general-purpose receptacles in a
dwelling. What conductor ampacity must generally be adequate for the circuit?
A. 14 amperes
B. 15 amperes
, C. 20 amperes
D. 30 amperes
Rationale: A branch circuit must have conductors with sufficient ampacity for the
load and overcurrent protection, subject to applicable NEC rules and permitted
adjustments. A standard 20-ampere branch circuit generally uses conductors rated
for at least 20 amperes.
Question 9
What is the main purpose of GFCI protection?
A. To protect people from electric shock caused by ground-fault current
B. To protect conductors from overloads
C. To regulate line voltage
D. To provide surge protection
Rationale: A ground-fault circuit interrupter monitors current leaving and
returning through the circuit conductors. An imbalance can indicate current
flowing through an unintended path, causing the device to interrupt the circuit.
Question 10
Which residential location commonly requires GFCI protection for receptacle
outlets under NEC dwelling-unit provisions?
A. A dry bedroom
B. A hallway with no plumbing
C. A finished attic with no plumbing
D. A bathroom
Rationale: Dwelling-unit bathroom receptacles are among the locations where
GFCI protection is required. The NEC contains additional GFCI requirements for
other locations, including certain outdoor, garage, kitchen, laundry, and
accessory-area receptacles.
Questions and Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
Question 1
What is the primary purpose of the National Electrical Code (NEC)?
A. To establish utility billing rates
B. To regulate electrical equipment manufacturing
C. To provide practical safeguards for persons and property from electrical
hazards
D. To establish electrical contractor licensing fees
Rationale: The NEC establishes provisions intended to safeguard people and
property from hazards arising from the use of electricity. It is primarily an
installation safety standard rather than a utility-rate or licensing document.
Question 2
Which NEC chapter primarily contains requirements for branch circuits?
A. Chapter 5
B. Chapter 2
C. Chapter 7
D. Chapter 9
Rationale: NEC Chapter 2 covers wiring and protection, including branch circuits
under Article 210. Chapter 3 addresses wiring methods and materials, while
Chapters 5 and 7 address special occupancies and special conditions.
,Question 3
In a typical dwelling, what is the purpose of a circuit breaker protecting a branch
circuit?
A. To increase the available voltage
B. To provide a neutral connection
C. To reduce the grounding electrode resistance
D. To protect conductors against overcurrent
Rationale: Overcurrent protective devices such as circuit breakers protect
conductors from excessive current that could cause overheating and fire. They are
selected according to the circuit conductors and applicable load requirements.
Question 4
A 120-volt load draws 12 amperes. What is its approximate power?
A. 120 watts
B. 1,000 watts
C. 1,440 watts
D. 1,920 watts
Rationale: Power is calculated as P = V × I. Therefore, 120 volts × 12 amperes =
1,440 watts.
Question 5
Which conductor normally carries current back to the source on a 120-volt single-
phase branch circuit?
A. The grounded conductor
B. The equipment grounding conductor
C. The grounding electrode conductor
D. The bonding jumper
Rationale: The grounded conductor, commonly called the neutral in a typical
dwelling circuit, carries the return current from a 120-volt load to the source. The
,equipment grounding conductor normally carries current only during a fault
condition.
Question 6
What is the primary function of an equipment grounding conductor?
A. To carry normal neutral current
B. To increase circuit voltage
C. To provide a separate service conductor
D. To provide a low-impedance fault-current path
Rationale: The equipment grounding conductor provides a conductive path for
fault current back to the source so that the overcurrent protective device can
operate promptly.
Question 7
Which wiring method is commonly used for residential branch circuits where
cable is permitted?
A. Rigid metal conduit only
B. Nonmetallic-sheathed cable
C. Busway
D. Electrical metallic tubing only
Rationale: Nonmetallic-sheathed cable, such as Type NM cable, is widely used for
permitted residential wiring applications. Its use remains subject to
environmental, physical-protection, and other NEC requirements.
Question 8
A 20-ampere branch circuit is intended to supply general-purpose receptacles in a
dwelling. What conductor ampacity must generally be adequate for the circuit?
A. 14 amperes
B. 15 amperes
, C. 20 amperes
D. 30 amperes
Rationale: A branch circuit must have conductors with sufficient ampacity for the
load and overcurrent protection, subject to applicable NEC rules and permitted
adjustments. A standard 20-ampere branch circuit generally uses conductors rated
for at least 20 amperes.
Question 9
What is the main purpose of GFCI protection?
A. To protect people from electric shock caused by ground-fault current
B. To protect conductors from overloads
C. To regulate line voltage
D. To provide surge protection
Rationale: A ground-fault circuit interrupter monitors current leaving and
returning through the circuit conductors. An imbalance can indicate current
flowing through an unintended path, causing the device to interrupt the circuit.
Question 10
Which residential location commonly requires GFCI protection for receptacle
outlets under NEC dwelling-unit provisions?
A. A dry bedroom
B. A hallway with no plumbing
C. A finished attic with no plumbing
D. A bathroom
Rationale: Dwelling-unit bathroom receptacles are among the locations where
GFCI protection is required. The NEC contains additional GFCI requirements for
other locations, including certain outdoor, garage, kitchen, laundry, and
accessory-area receptacles.
