MASTER ELECTRICIAN LICENSE PRACTICE
EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) PLUS
RATIONALES 2026 Q&A | INSTANT
DOWNLOAD PDF
1. What is the minimum burial depth for a direct burial cable under a
driveway?
• A. 12 inches
• B. 18 inches
• C. 24 inches
• D. 30 inches
NEC Table 300.5 requires 24 inches of cover for direct burial
conductors under driveways or parking areas.
2. Which of the following copper conductors has the greatest ampacity?
• A. #10 THHN
• B. #12 THWN
• C. #8 THHN
,• D. #6 TW
Larger conductors have lower resistance and higher ampacity; #8
THHN is rated higher than the others listed.
3. What is the NEC requirement for receptacle outlets in bathrooms?
• A. One per fixture
• B. Two per wall
• C. At least one GFCI-protected outlet
• D. One per 50 sq ft
Per NEC 210.52(D), at least one receptacle outlet shall be installed in
bathrooms, and it must be GFCI protected.
4. What is the continuous load factor applied in commercial calculations?
• A. 80%
• B. 100%
• C. 110%
• D. 125%
NEC 215.2 and 220.12 require continuous loads to be calculated at
125%.
5. A 3-phase, 4-wire wye-connected system has a line-to-line voltage of
208V. What is the line-to-neutral voltage?
• A. 240V
• B. 120V
• C. 208V
,• D. 277V
In a 3-phase wye system: V_L-N = V_L-L ÷ √3 = 208V ÷ 1.732 ≈ 120V.
6. What type of overcurrent protection is used for motor branch circuits?
• A. Circuit breaker only
• B. Short-circuit and ground fault protection device plus overload
protection
• C. Fuses only
• D. AFCI
Per NEC 430, motor circuits must be protected by both short-
circuit/ground-fault and overload protection.
7. How many 20-ampere small appliance branch circuits are required in a
kitchen?
• A. One
• B. Three
• C. Two
• D. Four
NEC 210.11(C)(1) requires a minimum of two 20-ampere small
appliance branch circuits in kitchens.
8. What is the maximum voltage drop allowed on a branch circuit for
proper performance?
• A. 10%
• B. 8%
• C. 3%
, • D. 5%
NEC recommends (not mandates) that voltage drop should not
exceed 3% on branch circuits to ensure efficiency.
9. A feeder supplies a continuous load of 60A. What minimum ampacity
must the conductor have?
• A. 60A
• B. 70A
• C. 75A
• D. 90A
Continuous loads are calculated at 125%, so 60A × 1.25 = 75A.
10. What color is typically used for a grounded conductor in
residential wiring?
• A. Red
• B. White
• C. Green
• D. Blue
White or gray conductors are used for the grounded (neutral)
conductor per NEC 200.6.
11. What is the function of a bonding jumper?
• A. Carry load current
• B. Ensure continuity of the grounding path
• C. Interrupt fault current
EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) PLUS
RATIONALES 2026 Q&A | INSTANT
DOWNLOAD PDF
1. What is the minimum burial depth for a direct burial cable under a
driveway?
• A. 12 inches
• B. 18 inches
• C. 24 inches
• D. 30 inches
NEC Table 300.5 requires 24 inches of cover for direct burial
conductors under driveways or parking areas.
2. Which of the following copper conductors has the greatest ampacity?
• A. #10 THHN
• B. #12 THWN
• C. #8 THHN
,• D. #6 TW
Larger conductors have lower resistance and higher ampacity; #8
THHN is rated higher than the others listed.
3. What is the NEC requirement for receptacle outlets in bathrooms?
• A. One per fixture
• B. Two per wall
• C. At least one GFCI-protected outlet
• D. One per 50 sq ft
Per NEC 210.52(D), at least one receptacle outlet shall be installed in
bathrooms, and it must be GFCI protected.
4. What is the continuous load factor applied in commercial calculations?
• A. 80%
• B. 100%
• C. 110%
• D. 125%
NEC 215.2 and 220.12 require continuous loads to be calculated at
125%.
5. A 3-phase, 4-wire wye-connected system has a line-to-line voltage of
208V. What is the line-to-neutral voltage?
• A. 240V
• B. 120V
• C. 208V
,• D. 277V
In a 3-phase wye system: V_L-N = V_L-L ÷ √3 = 208V ÷ 1.732 ≈ 120V.
6. What type of overcurrent protection is used for motor branch circuits?
• A. Circuit breaker only
• B. Short-circuit and ground fault protection device plus overload
protection
• C. Fuses only
• D. AFCI
Per NEC 430, motor circuits must be protected by both short-
circuit/ground-fault and overload protection.
7. How many 20-ampere small appliance branch circuits are required in a
kitchen?
• A. One
• B. Three
• C. Two
• D. Four
NEC 210.11(C)(1) requires a minimum of two 20-ampere small
appliance branch circuits in kitchens.
8. What is the maximum voltage drop allowed on a branch circuit for
proper performance?
• A. 10%
• B. 8%
• C. 3%
, • D. 5%
NEC recommends (not mandates) that voltage drop should not
exceed 3% on branch circuits to ensure efficiency.
9. A feeder supplies a continuous load of 60A. What minimum ampacity
must the conductor have?
• A. 60A
• B. 70A
• C. 75A
• D. 90A
Continuous loads are calculated at 125%, so 60A × 1.25 = 75A.
10. What color is typically used for a grounded conductor in
residential wiring?
• A. Red
• B. White
• C. Green
• D. Blue
White or gray conductors are used for the grounded (neutral)
conductor per NEC 200.6.
11. What is the function of a bonding jumper?
• A. Carry load current
• B. Ensure continuity of the grounding path
• C. Interrupt fault current
