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JOURNEYMAN NEC 2023

Journeyman Electrician Practice Test 32

Free Online Journeyman Electrician Exam Practice Test — 32This free 30-question practice test covers journeyman electrician exam topics based on the 2023 NEC, including receptacle load calculations, branch circuit design, conductor selection, transformer concepts, 3-phase systems, energy calculations, emergency systems, motor overload protection, and more.

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Most state Journeyman exams have 80–100 questions covering NEC code, wiring methods, branch circuits, motor controls, and load calculations.

Most states require a 70–75% passing score. This practice test uses the same 70% pass threshold so you know where you stand.

Questions are written to the 2023 NEC. Check your state licensing board to confirm which edition your state has adopted.

Key rules before you start: In retail stores, each receptacle counts as 180 VA (NEC 220.14(I)); divide by supply voltage to get amps per receptacle, then divide circuit rating by that to find maximum receptacles. For a dwelling unit, calculate lighting load at 3 VA per square foot (NEC Table 220.12) — do not add individual receptacle or luminaire loads on top of that. Standard fluorescent ballasts are listed only for 15A or 20A circuits. Motor overload protection is set at 115% of motor FLC for most motors (NEC 430.32(A)(1)); round up to the next standard size. A fuel cell emergency power source must run for at least 2 hours (NEC 700.12(E)). For parallel conductors, divide the total load by the number of sets to find the required ampacity per set, then look up NEC Table 310.16.

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Journeyman Electrician Practice Test 32 — Question List

Question 1: Which of the following is the maximum number of receptacles permitted on a 15-ampere breaker supplied by a normal 120 volts power source in a retail shop?

NEC Reference: NEC 220.14(I)

Question 2: Which of the following is the total load of a 2500 sq ft dwelling unit that has 20 receptacles and 15 luminaries each rated 100w?

7500 Volt-Amperes
11000 Volt-Amperes
9500 Volt-Amperes
12000 Volt-Amperes

NEC Reference: NEC 220.14

Question 3: Fluorescent luminaires cannot be installed on branch circuits rated more than 20 amperes.

True
False

NEC Reference: NEC 410.130

Question 4: The overload protection of the equipment is rated at 25 A which of the following conductor shall be used?

No 16 AWG Copper
No 14 AWG Copper
No 18 AWG Copper
No 12 AWG Copper

NEC Reference: NEC Table 310.16

Question 5: An electric circuit has an over current device rated at 1170 A using three sets of conductors with one per each phase. what is the minimum size of that can be used?

600 kcmil copper
500 kcmil copper
400 kcmil copper
700 kcmil copper

NEC Reference: NEC Table 310.16

Question 6: What is the general phase angle between primary and secondary of a transformer?

180 0
90 0
270 0
45 0

Question 7: A three phase 4 wire electrical system phase to phase voltage is 480 Volts. what is its phase to neutral voltage?

480 volts
240 volts
277 volts
377 volts

Question 8: How many joules of energy will a 20 W Lamp dissipates in 5 minutes?

6000 joules
100 joules
4 joules
1500 joules

Question 9: What is the minimum time that a fuel cell system should supply emergency power in-case of normal power failure?

1 hour
1/2 hour
2 hours
2 1/2 hours

NEC Reference: NEC 700.12(E)

Question 10: A single-phase motor has a full-load current (FLC) of 28 amperes. What is the maximum overload protection device rating for this motor?

30 A
35
40
45

NEC Reference: NEC 430.32(A)(1)

Question 11: A branch circuit supplies a continuous load of 16 amperes. Per NEC 210.19(A)(1), what is the minimum ampacity the branch circuit conductor must have?

16 amperes
18 amperes
20 amperes
25 amperes

NEC Reference: NEC 210.19(A)(1)

Question 12: Per NEC 210.52(B)(1), how many 20-ampere small appliance branch circuits are required as a minimum in the kitchen area of a dwelling unit?

One 15-ampere circuit
One 20-ampere circuit
Two 20-ampere circuits
Three 20-ampere circuits

NEC Reference: NEC 210.52(B)(1)

Question 13: A conduit contains 4 current-carrying conductors. Per NEC Table 310.15(C)(1), the conductors' ampacity must be multiplied by an adjustment factor of _____ percent.

100%
90%
80%
70%

NEC Reference: NEC Table 310.15(C)(1)

Question 14: A transformer has 400 turns on the primary winding and 100 turns on the secondary winding. If the primary voltage is 480 volts, what is the secondary voltage?

480 volts
240 volts
120 volts
48 volts

Question 15: Per NEC 430.102(B), the disconnecting means for a motor controller must be located _____ the controller.

At least 50 feet from
Within sight from
In the same room as
Directly adjacent to

NEC Reference: NEC 430.102(B)

Question 16: Per NEC 250.52(A)(3), a concrete-encased electrode (also called a Ufer ground) must contain at least _____ feet of reinforcing rebar or bare copper conductor, encased in concrete in contact with the earth.

8 feet
10 feet
20 feet
25 feet

NEC Reference: NEC 250.52(A)(3)

Question 17: Per NEC 210.52(F), dwelling units must have at least one dedicated branch circuit for the laundry area. This circuit must be rated at _____ .

15 amperes
20 amperes
30 amperes
50 amperes

NEC Reference: NEC 210.52(F)

Question 18: Per NEC Chapter 9, Table 1, when a conduit contains exactly 2 conductors, the maximum fill percentage of the conduit cross-sectional area is _____ percent.

NEC Reference: NEC Chapter 9, Table 1

Question 19: Per NEC 230.24(B)(2), overhead service conductors above a residential driveway must have a minimum vertical clearance of _____ feet above the ground.

8 feet
10 feet
12 feet
18 feet

NEC Reference: NEC 230.24(B)

Question 20: Per NEC 210.52(D), at least one receptacle outlet in a dwelling unit bathroom must be installed within _____ feet of the outside edge of each basin.

1 foot
2 feet
3 feet
6 feet

NEC Reference: NEC 210.52(D)

Question 21: Per NEC 250.53(A)(2), if a single driven ground rod has a resistance to earth greater than 25 ohms, what must be done?

Nothing — one ground rod is always sufficient
Install at least one additional grounding electrode
Replace the rod with a larger diameter rod
Connect the rod to the water pipe instead

NEC Reference: NEC 250.53(A)(2)

Question 22: Three resistors — 5 ohms, 10 ohms, and 15 ohms — are connected in series. What is the total resistance of the circuit?

10 ohms
15 ohms
30 ohms
3 ohms

Question 23: Per NEC 210.52(C)(2), a kitchen island countertop requires at least one receptacle outlet if its long dimension is _ inches or more and its short dimension is _ inches or more.

12 inches long and 6 inches wide
24 inches long and 12 inches wide
36 inches long and 12 inches wide
24 inches long and 24 inches wide

NEC Reference: NEC 210.52(C)(2)

Question 24: Per NEC 250.64(A), a grounding electrode conductor (GEC) shall be made of which of the following materials?

Only solid copper
Copper, aluminum, or copper-clad aluminum
Steel or iron
Any metallic material

NEC Reference: NEC 250.64(A)

Question 25: Per NEC 430.110(A), the motor disconnecting means must be rated at not less than _____ percent of the motor's full-load current (FLC).

100%
115%
125%
150%

NEC Reference: NEC 430.110(A)

Question 26: Per NEC 422.12, central heating equipment (such as a gas or oil furnace with an electric blower) shall be supplied by _____ .

Any available branch circuit
An individual (dedicated) branch circuit
The same circuit as the air conditioner
A 240-volt circuit only

NEC Reference: NEC 422.12

Question 27: Per NEC 680.22(A)(1), receptacle outlets near a permanently installed swimming pool shall not be installed within _____ feet of the inside walls of the pool.

3 feet
5 feet
6 feet
10 feet

NEC Reference: NEC 680.22(A)(1)

Question 28: A single-phase load has an apparent power of 1,500 volt-amperes and a power factor of 0.90. What is the true power consumed by this load?

1,500 watts
1,350 watts
1,666 watts
135 watts

Question 29: Per NEC Table 300.5, what is the minimum burial depth for Type USE (Underground Service Entrance) cable in a general location?

6 inches
12 inches
18 inches
24 inches

NEC Reference: NEC Table 300.5

Question 30: A series circuit has a 120-volt source connected to a 60-ohm resistor and a 30-ohm resistor. What is the total current in the circuit?

0.5 amperes
1.33 amperes
2 amperes
4 amperes

Key NEC References for This Test

Article	What It Covers
Art. 100	Definitions — know: feeder, branch circuit, OCPD, dwelling unit
Art. 210	Branch Circuits — GFCI/AFCI locations, circuit ratings, outlet spacing (most tested)
Art. 220	Load Calculations — dwelling unit standard method
Art. 250	Grounding & Bonding — GEC sizing, electrode system, EGC
Art. 310	Conductors — ampacity (Table 310.12), insulation, derate rules
Art. 430	Motors — conductor 125% FLA, OCPD 250% FLA, overloads, disconnects

Study Tip: Tab Articles 210, 250, and 430 in your NEC before the exam. Know the Table 310.12 ampacity values for 14, 12, 10, 8, 6, and 4 AWG copper.

Journeyman Electrician Practice Test 32

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Journeyman Electrician Practice Test 32

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Journeyman Electrician Practice Test 32 — Question List

Question 1: Which of the following is the maximum number of receptacles permitted on a 15-ampere breaker supplied by a normal 120 volts power source in a retail shop?

Question 2: Which of the following is the total load of a 2500 sq ft dwelling unit that has 20 receptacles and 15 luminaries each rated 100w?

Question 3: Fluorescent luminaires cannot be installed on branch circuits rated more than 20 amperes.

Question 4: The overload protection of the equipment is rated at 25 A which of the following conductor shall be used?

Question 5: An electric circuit has an over current device rated at 1170 A using three sets of conductors with one per each phase. what is the minimum size of that can be used?

Question 6: What is the general phase angle between primary and secondary of a transformer?

Question 7: A three phase 4 wire electrical system phase to phase voltage is 480 Volts. what is its phase to neutral voltage?

Question 8: How many joules of energy will a 20 W Lamp dissipates in 5 minutes?

Question 9: What is the minimum time that a fuel cell system should supply emergency power in-case of normal power failure?

Question 10: A single-phase motor has a full-load current (FLC) of 28 amperes. What is the maximum overload protection device rating for this motor?

Question 11: A branch circuit supplies a continuous load of 16 amperes. Per NEC 210.19(A)(1), what is the minimum ampacity the branch circuit conductor must have?

Question 12: Per NEC 210.52(B)(1), how many 20-ampere small appliance branch circuits are required as a minimum in the kitchen area of a dwelling unit?

Question 13: A conduit contains 4 current-carrying conductors. Per NEC Table 310.15(C)(1), the conductors' ampacity must be multiplied by an adjustment factor of _____ percent.

Question 14: A transformer has 400 turns on the primary winding and 100 turns on the secondary winding. If the primary voltage is 480 volts, what is the secondary voltage?

Question 15: Per NEC 430.102(B), the disconnecting means for a motor controller must be located _____ the controller.

Question 16: Per NEC 250.52(A)(3), a concrete-encased electrode (also called a Ufer ground) must contain at least _____ feet of reinforcing rebar or bare copper conductor, encased in concrete in contact with the earth.

Question 17: Per NEC 210.52(F), dwelling units must have at least one dedicated branch circuit for the laundry area. This circuit must be rated at _____ .

Question 18: Per NEC Chapter 9, Table 1, when a conduit contains exactly 2 conductors, the maximum fill percentage of the conduit cross-sectional area is _____ percent.

Question 19: Per NEC 230.24(B)(2), overhead service conductors above a residential driveway must have a minimum vertical clearance of _____ feet above the ground.

Question 20: Per NEC 210.52(D), at least one receptacle outlet in a dwelling unit bathroom must be installed within _____ feet of the outside edge of each basin.

Question 21: Per NEC 250.53(A)(2), if a single driven ground rod has a resistance to earth greater than 25 ohms, what must be done?

Question 22: Three resistors — 5 ohms, 10 ohms, and 15 ohms — are connected in series. What is the total resistance of the circuit?

Question 23: Per NEC 210.52(C)(2), a kitchen island countertop requires at least one receptacle outlet if its long dimension is _____ inches or more and its short dimension is _____ inches or more.

Question 24: Per NEC 250.64(A), a grounding electrode conductor (GEC) shall be made of which of the following materials?

Question 25: Per NEC 430.110(A), the motor disconnecting means must be rated at not less than _____ percent of the motor's full-load current (FLC).

Question 26: Per NEC 422.12, central heating equipment (such as a gas or oil furnace with an electric blower) shall be supplied by _____ .

Question 27: Per NEC 680.22(A)(1), receptacle outlets near a permanently installed swimming pool shall not be installed within _____ feet of the inside walls of the pool.

Question 28: A single-phase load has an apparent power of 1,500 volt-amperes and a power factor of 0.90. What is the true power consumed by this load?

Question 29: Per NEC Table 300.5, what is the minimum burial depth for Type USE (Underground Service Entrance) cable in a general location?

Question 30: A series circuit has a 120-volt source connected to a 60-ohm resistor and a 30-ohm resistor. What is the total current in the circuit?

Key NEC References for This Test

Related Practice Tests

Question 23: Per NEC 210.52(C)(2), a kitchen island countertop requires at least one receptacle outlet if its long dimension is _ inches or more and its short dimension is _ inches or more.