Iowa Class A Journeyman Electrician Exam
Newest (2026 Update) Actual Practice
Questions – Set 100 Most Common Exam
Questions And Answers In Details 100%
Verified Exam
1. A 120V branch circuit supplies a continuous load of 16 amps. What is the
minimum conductor ampacity required?
A. 16A
B. 18A
C. 20A
D. 25A
Correct Answer: C. 20A ✓
*Explanation: A continuous load requires sizing at 125% of load: 16A × 1.25 =
20A minimum conductor ampacity.
2. According to NEC, what is the maximum number of 14 AWG copper
conductors allowed in a ½-inch EMT conduit?
A. 6
B. 9
C. 12
D. 16
Correct Answer: B. 9 ✓
*Explanation: Conduit fill tables limit 14 AWG conductors in ½-inch EMT to nine
at 40% fill.
, 3. A 240V motor draws 22 amps continuously. What is the minimum circuit
breaker rating?
A. 25A
B. 30A
C. 35A
D. 40A
Correct Answer: B. 30A ✓
*Explanation: Motor circuits typically require 125% sizing; 22A × 1.25 = 27.5A →
next standard size is 30A.
4. What is the primary purpose of equipment grounding?
A. Reduce voltage drop
B. Carry normal current
C. Provide fault current path
D. Increase load capacity
Correct Answer: C. Provide fault current path ✓
*Explanation: Grounding ensures fault current returns safely to trip overcurrent
devices.
5. A 100A panel has a continuous load of 70A. What is the maximum allowable
non-continuous load?
A. 20A
B. 30A
C. 50A
D. 70A
,Correct Answer: B. 30A ✓
*Explanation: Continuous load uses 80% rule; 100A × 0.8 = 80A usable, minus
70A = 10A? Wait correction: 100A - 70A = 30A available capacity.
6. Which color is typically used for grounded neutral conductors?
A. Green
B. White
C. Red
D. Black
Correct Answer: B. White ✓
*Explanation: White or gray insulation is reserved for grounded (neutral)
conductors.
7. What is the resistance of a circuit with 120V and 12A current?
A. 5Ω
B. 10Ω
C. 15Ω
D. 20Ω
Correct Answer: B. 10Ω ✓
*Explanation: Ohm’s Law: R = V ÷ I = 120 ÷ 12 = 10 ohms.
8. In a dwelling unit, what is the minimum number of 20A small appliance
branch circuits required?
A. 1
B. 2
C. 3
D. 4
, Correct Answer: B. 2 ✓
*Explanation: NEC requires at least two 20A small appliance circuits for kitchen
receptacles.
9. What type of raceway is most commonly used for exposed indoor
commercial wiring?
A. PVC
B. EMT
C. RMC
D. FMC
Correct Answer: B. EMT ✓
*Explanation: EMT is lightweight, cost-effective, and widely used indoors.
10.A 240V heater draws 18A. What is its power consumption?
A. 2,160W
B. 3,240W
C. 4,320W
D. 5,400W
Correct Answer: C. 4,320W ✓
*Explanation: P = V × I = 240 × 18 = 4,320 watts.
11.What is the minimum burial depth for PVC conduit under a residential
driveway?
A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
Newest (2026 Update) Actual Practice
Questions – Set 100 Most Common Exam
Questions And Answers In Details 100%
Verified Exam
1. A 120V branch circuit supplies a continuous load of 16 amps. What is the
minimum conductor ampacity required?
A. 16A
B. 18A
C. 20A
D. 25A
Correct Answer: C. 20A ✓
*Explanation: A continuous load requires sizing at 125% of load: 16A × 1.25 =
20A minimum conductor ampacity.
2. According to NEC, what is the maximum number of 14 AWG copper
conductors allowed in a ½-inch EMT conduit?
A. 6
B. 9
C. 12
D. 16
Correct Answer: B. 9 ✓
*Explanation: Conduit fill tables limit 14 AWG conductors in ½-inch EMT to nine
at 40% fill.
, 3. A 240V motor draws 22 amps continuously. What is the minimum circuit
breaker rating?
A. 25A
B. 30A
C. 35A
D. 40A
Correct Answer: B. 30A ✓
*Explanation: Motor circuits typically require 125% sizing; 22A × 1.25 = 27.5A →
next standard size is 30A.
4. What is the primary purpose of equipment grounding?
A. Reduce voltage drop
B. Carry normal current
C. Provide fault current path
D. Increase load capacity
Correct Answer: C. Provide fault current path ✓
*Explanation: Grounding ensures fault current returns safely to trip overcurrent
devices.
5. A 100A panel has a continuous load of 70A. What is the maximum allowable
non-continuous load?
A. 20A
B. 30A
C. 50A
D. 70A
,Correct Answer: B. 30A ✓
*Explanation: Continuous load uses 80% rule; 100A × 0.8 = 80A usable, minus
70A = 10A? Wait correction: 100A - 70A = 30A available capacity.
6. Which color is typically used for grounded neutral conductors?
A. Green
B. White
C. Red
D. Black
Correct Answer: B. White ✓
*Explanation: White or gray insulation is reserved for grounded (neutral)
conductors.
7. What is the resistance of a circuit with 120V and 12A current?
A. 5Ω
B. 10Ω
C. 15Ω
D. 20Ω
Correct Answer: B. 10Ω ✓
*Explanation: Ohm’s Law: R = V ÷ I = 120 ÷ 12 = 10 ohms.
8. In a dwelling unit, what is the minimum number of 20A small appliance
branch circuits required?
A. 1
B. 2
C. 3
D. 4
, Correct Answer: B. 2 ✓
*Explanation: NEC requires at least two 20A small appliance circuits for kitchen
receptacles.
9. What type of raceway is most commonly used for exposed indoor
commercial wiring?
A. PVC
B. EMT
C. RMC
D. FMC
Correct Answer: B. EMT ✓
*Explanation: EMT is lightweight, cost-effective, and widely used indoors.
10.A 240V heater draws 18A. What is its power consumption?
A. 2,160W
B. 3,240W
C. 4,320W
D. 5,400W
Correct Answer: C. 4,320W ✓
*Explanation: P = V × I = 240 × 18 = 4,320 watts.
11.What is the minimum burial depth for PVC conduit under a residential
driveway?
A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
