PRACTICE QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT
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1. The minimum size copper grounding electrode conductor for a 200-amp
service using 3/0 AWG copper conductors is:
A. No. 8 AWG
B. No. 6 AWG
C. No. 4 AWG
D. No. 2 AWG
Rationale: NEC Table 250.66 specifies No. 4 AWG copper as the minimum
grounding electrode conductor for 3/0 AWG copper service conductors.
2. The maximum number of 12 AWG conductors allowed in a ¾-inch EMT
raceway is:
A. 7
B. 9
C. 16
D. 20
Rationale: NEC Chapter 9, Table 1 and Table 4 limit fill to 40%—for 12 AWG
THHN, 16 conductors fit in ¾-inch EMT.
3. In Texas, a Journeyman Electrician license must be renewed:
A. Every 3 years
B. Every 5 years
C. Every year
D. Every 2 years
Rationale: The Texas Department of Licensing and Regulation (TDLR) requires
annual renewal of journeyman licenses.
,4. Type NM cable is NOT permitted in:
A. One- and two-family dwellings
B. Wood-frame construction
C. Commercial garages
D. Attics
Rationale: NEC 334.12 prohibits NM cable in commercial garages and similar
hazardous or damp locations.
5. The color coding for the grounded (neutral) conductor in a 120/240-volt
single-phase system is:
A. Red
B. White
C. Black
D. Blue
Rationale: NEC 200.6 requires the grounded conductor to be white or gray.
6. Receptacles in bathrooms must be protected by:
A. AFCI only
B. GFCI
C. Both GFCI and AFCI
D. Overcurrent protection only
Rationale: NEC 210.8(A)(1) requires GFCI protection for all bathroom
receptacles.
7. The maximum number of bends permitted between pull points in a conduit
run is:
A. 180 degrees
B. 360 degrees
C. 270 degrees
, D. 450 degrees
Rationale: NEC 358.26 limits total bends between pull points to 360 degrees.
8. The required working clearance in front of a 480-volt panelboard is:
A. 2 feet
B. 3 feet
C. 4 feet
D. 5 feet
Rationale: NEC 110.26(A)(1) requires at least 3 feet of clear working space for
480-volt equipment.
9. Underground PVC conduit must be buried at least:
A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
Rationale: NEC Table 300.5 requires 18 inches minimum cover for PVC conduit
under residential property.
10. A 20-amp branch circuit can supply a maximum of:
A. 10 amps
B. 15 amps
C. 16 amps continuous load
D. 20 amps continuous load
Rationale: Continuous loads must not exceed 80% of circuit rating (NEC
210.19(A)(1)).
11. The minimum clearance for overhead service drop conductors above
residential driveways is: