Minnesota Class A Master Electrician
Exam Practice Questions And Correct
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1. A Minnesota Class A Master Electrician is responsible for a broader
level of electrical work than a journeyworker. Under Minnesota law,
which experience pathway can qualify an applicant for the Class A
master electrician examination?
A. Two years of experience installing residential branch circuits only
B. Three years of experience as a registered unlicensed electrician
C. At least five years of acceptable experience in planning, laying out,
supervising, and installing wiring, apparatus, or equipment for electrical
light, heat, and power
D. Six months of experience as a maintenance electrician
Rationale: Minnesota law provides a Class A master electrician
qualification pathway based on at least five years of acceptable
experience in planning, laying out, supervising, and installing electrical
wiring, apparatus, or equipment for light, heat, and power. Other
qualifying pathways include an accredited four-year electrical
,engineering course or at least one year of qualifying journeyworker
experience.
2. As of July 1, 2026, which edition of the National Electrical Code is
used as the basis for questions on Minnesota electrical license
examinations?
A. 2020 NEC
B. 2023 NEC
C. 2025 NEC
D. 2026 NEC
Rationale: Minnesota DLI states that the 2026 National Electrical Code
became effective July 1, 2026, and is the code edition used for electrical
license examination questions.
3. A Class A master electrician is designing a feeder supplying a
120/240-volt single-phase dwelling load. The calculated load is
18,000 VA. What is the minimum calculated current before applying
any additional adjustment or correction factors?
A. 60 A
B. 75 A
C. 75 A
D. 90 A
Rationale: For a single-phase circuit, current is calculated as VA divided
by volts. Thus, 18,000 VA ÷ 240 V = 75 A. A master electrician must be
,able to translate calculated loads into conductor and overcurrent-
protection requirements.
4. A continuous load is calculated at 32 amperes. Assuming no other
applicable adjustment changes the result, what minimum ampacity
is generally required for the branch-circuit conductors supplying the
continuous load?
A. 32 A
B. 35 A
C. 40 A
D. 45 A
Rationale: Continuous loads are generally calculated at 125 percent for
conductor and overcurrent-device sizing. Therefore, 32 A × 1.25 = 40 A.
The master electrician must recognize this requirement when sizing
circuits.
5. A 120/240-volt, single-phase dwelling service has a calculated load
of 36,000 VA. What is the calculated service current?
A. 120 A
B. 135 A
C. 150 A
D. 180 A
Rationale: For a single-phase 120/240-volt service, the calculated
current is 36,000 VA ÷ 240 V = 150 A. This calculation is essential when
determining service conductor and equipment requirements.
, 6. Which statement best describes the primary purpose of overcurrent
protection?
A. To increase the available fault current
B. To maintain a constant power factor
C. To protect conductors and equipment from excessive current caused
by overloads, short circuits, or ground faults as applicable
D. To eliminate all voltage fluctuations
Rationale: Overcurrent protection is intended to protect electrical
conductors and equipment from damaging excessive current. The type
and location of protection depend on the applicable NEC requirements
and the characteristics of the circuit.
7. A 120-volt branch circuit supplies a 1,500-watt resistive heater.
Assuming unity power factor, approximately how much current
does the heater draw?
A. 8.0 A
B. 10.0 A
C. 12.5 A
D. 15.0 A
Rationale: For a resistive load at unity power factor, current equals
watts divided by volts. Therefore, 1,500 W ÷ 120 V = 12.5 A.
8. A conductor has a calculated ampacity of 80 amperes after applying
all required adjustment and correction factors. Which consideration
Exam Practice Questions And Correct
Answers (Verified Answers) Plus
Rationale 2027 Q&A| Instant
Download Pdf.
1. A Minnesota Class A Master Electrician is responsible for a broader
level of electrical work than a journeyworker. Under Minnesota law,
which experience pathway can qualify an applicant for the Class A
master electrician examination?
A. Two years of experience installing residential branch circuits only
B. Three years of experience as a registered unlicensed electrician
C. At least five years of acceptable experience in planning, laying out,
supervising, and installing wiring, apparatus, or equipment for electrical
light, heat, and power
D. Six months of experience as a maintenance electrician
Rationale: Minnesota law provides a Class A master electrician
qualification pathway based on at least five years of acceptable
experience in planning, laying out, supervising, and installing electrical
wiring, apparatus, or equipment for light, heat, and power. Other
qualifying pathways include an accredited four-year electrical
,engineering course or at least one year of qualifying journeyworker
experience.
2. As of July 1, 2026, which edition of the National Electrical Code is
used as the basis for questions on Minnesota electrical license
examinations?
A. 2020 NEC
B. 2023 NEC
C. 2025 NEC
D. 2026 NEC
Rationale: Minnesota DLI states that the 2026 National Electrical Code
became effective July 1, 2026, and is the code edition used for electrical
license examination questions.
3. A Class A master electrician is designing a feeder supplying a
120/240-volt single-phase dwelling load. The calculated load is
18,000 VA. What is the minimum calculated current before applying
any additional adjustment or correction factors?
A. 60 A
B. 75 A
C. 75 A
D. 90 A
Rationale: For a single-phase circuit, current is calculated as VA divided
by volts. Thus, 18,000 VA ÷ 240 V = 75 A. A master electrician must be
,able to translate calculated loads into conductor and overcurrent-
protection requirements.
4. A continuous load is calculated at 32 amperes. Assuming no other
applicable adjustment changes the result, what minimum ampacity
is generally required for the branch-circuit conductors supplying the
continuous load?
A. 32 A
B. 35 A
C. 40 A
D. 45 A
Rationale: Continuous loads are generally calculated at 125 percent for
conductor and overcurrent-device sizing. Therefore, 32 A × 1.25 = 40 A.
The master electrician must recognize this requirement when sizing
circuits.
5. A 120/240-volt, single-phase dwelling service has a calculated load
of 36,000 VA. What is the calculated service current?
A. 120 A
B. 135 A
C. 150 A
D. 180 A
Rationale: For a single-phase 120/240-volt service, the calculated
current is 36,000 VA ÷ 240 V = 150 A. This calculation is essential when
determining service conductor and equipment requirements.
, 6. Which statement best describes the primary purpose of overcurrent
protection?
A. To increase the available fault current
B. To maintain a constant power factor
C. To protect conductors and equipment from excessive current caused
by overloads, short circuits, or ground faults as applicable
D. To eliminate all voltage fluctuations
Rationale: Overcurrent protection is intended to protect electrical
conductors and equipment from damaging excessive current. The type
and location of protection depend on the applicable NEC requirements
and the characteristics of the circuit.
7. A 120-volt branch circuit supplies a 1,500-watt resistive heater.
Assuming unity power factor, approximately how much current
does the heater draw?
A. 8.0 A
B. 10.0 A
C. 12.5 A
D. 15.0 A
Rationale: For a resistive load at unity power factor, current equals
watts divided by volts. Therefore, 1,500 W ÷ 120 V = 12.5 A.
8. A conductor has a calculated ampacity of 80 amperes after applying
all required adjustment and correction factors. Which consideration
