WEST VIRGINIA MASTER ELECTRICIAN EXAM – QUESTIONS AND ANSWERS | VERIFIED AND WELL DETAILED
ANSWERS | PLUS RATIONALES | GUARANTEED PASS | LATEST EXAM UPDATE
Core Domains
• National Electrical Code (NEC) Requirements• Branch Circuits and Feeders• Grounding and Bonding• Motors and
Controllers• Services and Service Equipment• Transformers and Equipment• Special Occupancies and Equipment• West
Virginia State Code and Licensing Laws• Electrical Safety and OSHA Standards• General Electrical Theory and
Calculations
Introduction
The purpose of this exam is to evaluate the technical proficiency and regulatory knowledge required for licensure as a
Master Electrician in West Virginia. This comprehensive assessment focuses on the mastery of the National Electrical
Code, state-specific amendments, and advanced electrical theory. Candidates are tested on their ability to design,
install, and troubleshoot complex electrical systems while maintaining strict adherence to safety protocols. The exam
utilizes a combination of multiple-choice questions and scenario-based problems to simulate real-world decision-
making and critical thinking. Successful completion demonstrates a candidate's readiness to oversee large-scale projects
and ensure public safety through compliant electrical engineering practices.
Section One: Questions 1–100
1. What is the minimum clear working space depth required for equipment operating at 480 volts to ground
where live parts are exposed on one side and grounded parts are on the other side (Condition 2)?
A. 3 feet
B. 3.5 feet
C. 4 feet
D. 5 feet
,🟢 B. 3.5 feet
🔴 Explanation: Per NEC Table 110.26(A)(1), for Condition 2 (exposed live parts on one side and grounded parts on
the other) at a voltage of 151–600V to ground, the minimum clear distance is 3.5 feet.
2. A 240-volt, single-phase, 15-ampere rated electric heater is connected to a 20-ampere branch circuit. What is
the maximum permitted load for a continuous duty cycle on this circuit?
A. 12 amperes
B. 15 amperes
C. 16 amperes
D. 20 amperes
🟢 C. 16 amperes
🔴 Explanation: Continuous loads must not exceed 80% of the branch circuit rating. For a 20-ampere circuit, 20 x
0.80 = 16 amperes.
3. Which of the following conductor types is specifically rated for installation in a wet location?
A. THHN
B. THW
C. TW
D. THWN
🟢 D. THWN
🔴 Explanation: The "W" in THWN stands for "Water-resistant," indicating the insulation is suitable for wet locations,
unlike THHN which is dry/damp only.
4. What is the maximum number of disconnects allowed for a single service, grouped in one location, as per NEC
requirements?
,A. 2
B. 4
C. 6
D. 8
🟢 C. 6
🔴 Explanation: NEC 230.71 states that the service disconnecting means for each service shall consist of not more
than six switches or six circuit breakers mounted in a single enclosure or in a group of separate enclosures.
5. When calculating the load for a commercial building, what is the required volt-ampere (VA) per square foot for
general lighting in an office building?
A. 1.0 VA
B. 1.3 VA
C. 2.0 VA
D. 3.5 VA
🟢 B. 1.3 VA
🔴 Explanation: NEC Table 220.12 specifies the unit loads for various occupancies; for office buildings, the value is
1.3 VA per square foot.
6. A 1/2 HP, 115V single-phase motor has a full-load current (FLC) of 9.8 amperes. What is the minimum size for
the branch-circuit short-circuit and ground-fault protection using an inverse time breaker?
A. 15 amperes
B. 20 amperes
C. 25 amperes
D. 30 amperes
, 🟢 C. 25 amperes
🔴 Explanation: NEC Table 430.52 allows an inverse time breaker to be sized at 250% of the FLC. 9.8 x 2.5 = 24.5. The
next standard size up is 25 amperes.
7. Which grounding electrode is NOT permitted for use as a grounding electrode system?
A. Underground metal water pipe
B. Concrete-encased electrode
C. Underground metal gas piping
D. Ground ring
🟢 C. Underground metal gas piping
🔴 Explanation: NEC 250.52(B)(1) specifically prohibits the use of an underground metal gas piping system as a
grounding electrode.
8. For a dwelling unit, what is the minimum number of 20-ampere small-appliance branch circuits required for
the kitchen area?
A. 1
B. 2
C. 3
D. 4
🟢 B. 2
🔴 Explanation: NEC 210.11(C)(1) requires at least two 20-ampere small-appliance branch circuits for all receptacle
outlets specified by 210.52(B).
9. What is the maximum allowable voltage drop for a branch circuit to ensure reasonable efficiency of operation?
ANSWERS | PLUS RATIONALES | GUARANTEED PASS | LATEST EXAM UPDATE
Core Domains
• National Electrical Code (NEC) Requirements• Branch Circuits and Feeders• Grounding and Bonding• Motors and
Controllers• Services and Service Equipment• Transformers and Equipment• Special Occupancies and Equipment• West
Virginia State Code and Licensing Laws• Electrical Safety and OSHA Standards• General Electrical Theory and
Calculations
Introduction
The purpose of this exam is to evaluate the technical proficiency and regulatory knowledge required for licensure as a
Master Electrician in West Virginia. This comprehensive assessment focuses on the mastery of the National Electrical
Code, state-specific amendments, and advanced electrical theory. Candidates are tested on their ability to design,
install, and troubleshoot complex electrical systems while maintaining strict adherence to safety protocols. The exam
utilizes a combination of multiple-choice questions and scenario-based problems to simulate real-world decision-
making and critical thinking. Successful completion demonstrates a candidate's readiness to oversee large-scale projects
and ensure public safety through compliant electrical engineering practices.
Section One: Questions 1–100
1. What is the minimum clear working space depth required for equipment operating at 480 volts to ground
where live parts are exposed on one side and grounded parts are on the other side (Condition 2)?
A. 3 feet
B. 3.5 feet
C. 4 feet
D. 5 feet
,🟢 B. 3.5 feet
🔴 Explanation: Per NEC Table 110.26(A)(1), for Condition 2 (exposed live parts on one side and grounded parts on
the other) at a voltage of 151–600V to ground, the minimum clear distance is 3.5 feet.
2. A 240-volt, single-phase, 15-ampere rated electric heater is connected to a 20-ampere branch circuit. What is
the maximum permitted load for a continuous duty cycle on this circuit?
A. 12 amperes
B. 15 amperes
C. 16 amperes
D. 20 amperes
🟢 C. 16 amperes
🔴 Explanation: Continuous loads must not exceed 80% of the branch circuit rating. For a 20-ampere circuit, 20 x
0.80 = 16 amperes.
3. Which of the following conductor types is specifically rated for installation in a wet location?
A. THHN
B. THW
C. TW
D. THWN
🟢 D. THWN
🔴 Explanation: The "W" in THWN stands for "Water-resistant," indicating the insulation is suitable for wet locations,
unlike THHN which is dry/damp only.
4. What is the maximum number of disconnects allowed for a single service, grouped in one location, as per NEC
requirements?
,A. 2
B. 4
C. 6
D. 8
🟢 C. 6
🔴 Explanation: NEC 230.71 states that the service disconnecting means for each service shall consist of not more
than six switches or six circuit breakers mounted in a single enclosure or in a group of separate enclosures.
5. When calculating the load for a commercial building, what is the required volt-ampere (VA) per square foot for
general lighting in an office building?
A. 1.0 VA
B. 1.3 VA
C. 2.0 VA
D. 3.5 VA
🟢 B. 1.3 VA
🔴 Explanation: NEC Table 220.12 specifies the unit loads for various occupancies; for office buildings, the value is
1.3 VA per square foot.
6. A 1/2 HP, 115V single-phase motor has a full-load current (FLC) of 9.8 amperes. What is the minimum size for
the branch-circuit short-circuit and ground-fault protection using an inverse time breaker?
A. 15 amperes
B. 20 amperes
C. 25 amperes
D. 30 amperes
, 🟢 C. 25 amperes
🔴 Explanation: NEC Table 430.52 allows an inverse time breaker to be sized at 250% of the FLC. 9.8 x 2.5 = 24.5. The
next standard size up is 25 amperes.
7. Which grounding electrode is NOT permitted for use as a grounding electrode system?
A. Underground metal water pipe
B. Concrete-encased electrode
C. Underground metal gas piping
D. Ground ring
🟢 C. Underground metal gas piping
🔴 Explanation: NEC 250.52(B)(1) specifically prohibits the use of an underground metal gas piping system as a
grounding electrode.
8. For a dwelling unit, what is the minimum number of 20-ampere small-appliance branch circuits required for
the kitchen area?
A. 1
B. 2
C. 3
D. 4
🟢 B. 2
🔴 Explanation: NEC 210.11(C)(1) requires at least two 20-ampere small-appliance branch circuits for all receptacle
outlets specified by 210.52(B).
9. What is the maximum allowable voltage drop for a branch circuit to ensure reasonable efficiency of operation?
