Ct Unlimited Electrical Contractor (E-
1) Practice Exam Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A| Instant
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1. What is the minimum size copper grounding electrode conductor for a
200-amp service?
A. 4 AWG
B. 6 AWG
C. 2 AWG
D. 8 AWG
Rationale: NEC Table 250.66 requires 2 AWG copper for a 3/0–4/0 service
conductor size used on 200A services.
2. The maximum number of 90° bends permitted in a single conduit run
is:
A. 2
B. 3
C. 4
D. 5
Rationale: NEC 358.26 and similar conduit articles limit total bends to 360
degrees.
3. Type NM cable is permitted in which of the following locations?
,A. Wood-frame dwelling units
B. Wet locations
C. Places of assembly
D. Hazardous locations
Rationale: NEC 334 permits NM only in normally dry, residential/light
commercial wood construction.
4. The grounding electrode conductor must be electrically continuous by
which method?
A. Tape
B. Exothermic welding
C. Plastic ties
D. Electrical tape
Rationale: Exothermic welding creates a permanent low-resistance bond
(NEC 250.70).
5. A 3-way switch installation requires how many travelers between
switches?
A. 1
B. 2
C. 3
D. 4
Rationale: 3-way switches require two traveler conductors for proper
function.
6. A continuous load must be calculated at what percentage of its value?
A. 80%
B. 90%
C. 125%
D. 150%
Rationale: Continuous loads must be multiplied by 125% per NEC
210.20(A).
7. The minimum burial depth for direct-buried 0–600V cable under a
residential driveway is:
, A. 12 inches
B. 18 inches
C. 24 inches
D. 30 inches
Rationale: NEC Table 300.5 requires 24" cover under driveways.
8. A 20-amp small-appliance branch circuit in a kitchen must serve at
least how many countertop receptacles?
A. 1
B. 2
C. 3
D. 4
Rationale: NEC 210.11(C)(1) mandates two 20A small-appliance circuits.
9. What is the allowable ampacity of 12 AWG copper THHN conductor
at 90°C?
A. 25A
B. 30A
C. 35A
D. 40A
Rationale: NEC Table 310.16 assigns 35A at 90°C for 12 AWG copper.
10. A disconnecting means for air-conditioning equipment must be
located:
A. Inside the residence
B. Within sight of the equipment
C. At service entrance
D. In attic
Rationale: NEC 440.14 requires a disconnect within sight and readily
accessible.
(QUESTIONS 11–50 CONTINUE BELOW)
1) Practice Exam Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A| Instant
Download Pdf
1. What is the minimum size copper grounding electrode conductor for a
200-amp service?
A. 4 AWG
B. 6 AWG
C. 2 AWG
D. 8 AWG
Rationale: NEC Table 250.66 requires 2 AWG copper for a 3/0–4/0 service
conductor size used on 200A services.
2. The maximum number of 90° bends permitted in a single conduit run
is:
A. 2
B. 3
C. 4
D. 5
Rationale: NEC 358.26 and similar conduit articles limit total bends to 360
degrees.
3. Type NM cable is permitted in which of the following locations?
,A. Wood-frame dwelling units
B. Wet locations
C. Places of assembly
D. Hazardous locations
Rationale: NEC 334 permits NM only in normally dry, residential/light
commercial wood construction.
4. The grounding electrode conductor must be electrically continuous by
which method?
A. Tape
B. Exothermic welding
C. Plastic ties
D. Electrical tape
Rationale: Exothermic welding creates a permanent low-resistance bond
(NEC 250.70).
5. A 3-way switch installation requires how many travelers between
switches?
A. 1
B. 2
C. 3
D. 4
Rationale: 3-way switches require two traveler conductors for proper
function.
6. A continuous load must be calculated at what percentage of its value?
A. 80%
B. 90%
C. 125%
D. 150%
Rationale: Continuous loads must be multiplied by 125% per NEC
210.20(A).
7. The minimum burial depth for direct-buried 0–600V cable under a
residential driveway is:
, A. 12 inches
B. 18 inches
C. 24 inches
D. 30 inches
Rationale: NEC Table 300.5 requires 24" cover under driveways.
8. A 20-amp small-appliance branch circuit in a kitchen must serve at
least how many countertop receptacles?
A. 1
B. 2
C. 3
D. 4
Rationale: NEC 210.11(C)(1) mandates two 20A small-appliance circuits.
9. What is the allowable ampacity of 12 AWG copper THHN conductor
at 90°C?
A. 25A
B. 30A
C. 35A
D. 40A
Rationale: NEC Table 310.16 assigns 35A at 90°C for 12 AWG copper.
10. A disconnecting means for air-conditioning equipment must be
located:
A. Inside the residence
B. Within sight of the equipment
C. At service entrance
D. In attic
Rationale: NEC 440.14 requires a disconnect within sight and readily
accessible.
(QUESTIONS 11–50 CONTINUE BELOW)
