WASHINGTON ELECTRICAL ADMINISTRATOR
EXAM Newest (2026 Update) Actual Practice
Questions – Set 100 Most Common Exam
Questions And Answers In Details 100%
Verified Exam Highly Recommendable For
Grade A+
1. A feeder supplies a continuous load of 32 amps. What is the minimum
ampacity required after applying NEC continuous load rules?
A. 32A
B. 40A
C. 45A
D. 50A
Answer: B ✓ (B. 40A)
Rationale: Continuous loads must be sized at 125% per NEC, so 32A × 1.25 = 40A.
2. According to NEC, which conductor is typically permitted to serve as a
grounded conductor?
A. Bare copper
B. Green insulated conductor
C. White or gray insulated conductor
D. Any color conductor
Answer: C ✓ (C. White or gray insulated conductor)
Rationale: Grounded (neutral) conductors must be white or gray insulation per
NEC color coding rules.
, 3. What is the maximum voltage drop recommended for feeders and branch
circuits combined for efficiency?
A. 3%
B. 5%
C. 7%
D. 10%
Answer: B ✓ (B. 5%)
Rationale: NEC recommends 3% for branch circuits and 5% total for feeders plus
branch circuits.
4. A 240V circuit draws 18 amps. What is the minimum conductor ampacity
required for continuous operation?
A. 18A
B. 20A
C. 22.5A
D. 25A
Answer: D ✓ (D. 25A)
Rationale: 18A × 125% = 22.5A, next standard size is 25A.
5. Which device is primarily used for overload protection?
A. Switch
B. Fuse
C. Receptacle
D. Transformer
Answer: B ✓ (B. Fuse)
Rationale: Fuses and breakers protect against overloads and short circuits.
, 6. What is the minimum working clearance in front of electrical equipment
rated 0–150V to ground?
A. 2 feet
B. 3 feet
C. 4 feet
D. 5 feet
Answer: B ✓ (B. 3 feet)
Rationale: NEC requires at least 3 feet of clearance for low-voltage equipment.
7. A motor draws 28A full load. What is the minimum branch-circuit conductor
ampacity?
A. 28A
B. 30A
C. 35A
D. 40A
Answer: C ✓ (C. 35A)
Rationale: Motor conductors are sized at 125% of FLC: 28 × 1.25 = 35A.
8. Which of the following is NOT a requirement for grounding electrode
systems?
A. Metal underground water pipe
B. Concrete-encased electrode
C. Equipment grounding conductor
D. Ground rod
Answer: C ✓ (C. Equipment grounding conductor)
Rationale: EGC is part of equipment grounding, not grounding electrode system.
EXAM Newest (2026 Update) Actual Practice
Questions – Set 100 Most Common Exam
Questions And Answers In Details 100%
Verified Exam Highly Recommendable For
Grade A+
1. A feeder supplies a continuous load of 32 amps. What is the minimum
ampacity required after applying NEC continuous load rules?
A. 32A
B. 40A
C. 45A
D. 50A
Answer: B ✓ (B. 40A)
Rationale: Continuous loads must be sized at 125% per NEC, so 32A × 1.25 = 40A.
2. According to NEC, which conductor is typically permitted to serve as a
grounded conductor?
A. Bare copper
B. Green insulated conductor
C. White or gray insulated conductor
D. Any color conductor
Answer: C ✓ (C. White or gray insulated conductor)
Rationale: Grounded (neutral) conductors must be white or gray insulation per
NEC color coding rules.
, 3. What is the maximum voltage drop recommended for feeders and branch
circuits combined for efficiency?
A. 3%
B. 5%
C. 7%
D. 10%
Answer: B ✓ (B. 5%)
Rationale: NEC recommends 3% for branch circuits and 5% total for feeders plus
branch circuits.
4. A 240V circuit draws 18 amps. What is the minimum conductor ampacity
required for continuous operation?
A. 18A
B. 20A
C. 22.5A
D. 25A
Answer: D ✓ (D. 25A)
Rationale: 18A × 125% = 22.5A, next standard size is 25A.
5. Which device is primarily used for overload protection?
A. Switch
B. Fuse
C. Receptacle
D. Transformer
Answer: B ✓ (B. Fuse)
Rationale: Fuses and breakers protect against overloads and short circuits.
, 6. What is the minimum working clearance in front of electrical equipment
rated 0–150V to ground?
A. 2 feet
B. 3 feet
C. 4 feet
D. 5 feet
Answer: B ✓ (B. 3 feet)
Rationale: NEC requires at least 3 feet of clearance for low-voltage equipment.
7. A motor draws 28A full load. What is the minimum branch-circuit conductor
ampacity?
A. 28A
B. 30A
C. 35A
D. 40A
Answer: C ✓ (C. 35A)
Rationale: Motor conductors are sized at 125% of FLC: 28 × 1.25 = 35A.
8. Which of the following is NOT a requirement for grounding electrode
systems?
A. Metal underground water pipe
B. Concrete-encased electrode
C. Equipment grounding conductor
D. Ground rod
Answer: C ✓ (C. Equipment grounding conductor)
Rationale: EGC is part of equipment grounding, not grounding electrode system.
