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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: In a commercial building, how is the load calculated for an outlet serving a specific appliance (such as a 1,500 VA coffee urn)?

At 180 VA per outlet
At 1 VA per sq ft
At 50% of its rating
At the rating of the appliance

NEC Reference: NEC 220.14(A)

Question 2: A 1,800 sq ft dwelling has 25 general-use receptacles and 12 lighting outlets. What general lighting load is used?

5,400 VA
6,600 VA
9,900 VA
11,940 VA

NEC Reference: NEC 220.14(J) and 220.41

Question 3: May an outdoor luminaire be supported by a tree?

Yes, trees may support them
Only for holiday lighting
No, never
Only if the tree is dead

NEC Reference: NEC 410.36(G)

Question 4: Unless specifically permitted elsewhere, what is the maximum overcurrent protection for 12 AWG aluminum (or copper-clad aluminum) conductors?

10 A
15 A
20 A
25 A

NEC Reference: NEC 240.4(D)(4)

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 does a transformer's kVA rating represent?

Its maximum fault current
Its continuous output at rated voltage
Its input power at no load
Its core loss in watts

Question 7: A 3-phase, 4-wire wye system has 480 V phase to phase. What is the phase-to-neutral voltage?

480 V
377 V
277 V
240 V

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: A fuel cell system used as an emergency power source must be able to carry the full emergency load for at least:

½ hour
1 hour
1½ hours
2 hours

NEC Reference: NEC 700.12

Question 10: A motor with no marked service factor and a 50 °C temperature rise has a nameplate full-load current of 28 A. What is the maximum rating of its separate overload device?

28.0 A
32.2 A
35.0 A
39.2 A

NEC Reference: NEC 430.32(A)(1)

Question 11: A branch circuit supplies a 40 A continuous load. The panelboard and its breaker are listed for operation at 100% of their rating. What minimum conductor ampacity is required?

60 A
50 A
40 A
32 A

NEC Reference: NEC 210.19(A)(1) Exception No. 1

Question 12: The dwelling small-appliance branch circuits may NOT supply which of these?

An outdoor receptacle
The dining room receptacles
The kitchen countertop receptacles
A receptacle for an electric clock

NEC Reference: NEC 210.52(B)(2)

Question 13: A raceway contains 45 current-carrying conductors. What adjustment factor applies?

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: A motor control circuit is fed from a separate source. What does 430.75(A) require when the motor disconnecting means is opened?

Nothing; the control circuit may stay on
A warning light must come on
Only the motor power is disconnected
It must be disconnected from all sources

NEC Reference: NEC 430.75(A)

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: An appliance receptacle outlet for a dwelling clothes washer must be within what distance of the intended location of the appliance?

3 ft
6 ft
10 ft
12 ft

NEC Reference: NEC 210.50(C)

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: May the grounded (neutral) conductor of underground service conductors be bare copper when installed in a raceway?

Only for services under 100 A
Only if it is aluminum
No, all service conductors must be insulated
Yes, bare copper is permitted in a raceway

NEC Reference: NEC 230.30(A) Exception

Question 20: A ground-level unit in a multifamily building has its own exterior entrance. What outdoor receptacle is required?

One at the front and one at the back
One, from grade, max 6½ ft high
None
One on each balcony only

NEC Reference: NEC 210.52(E)(2)

Question 21: Besides water pipe, building steel, concrete-encased electrodes, ground rings, rods, pipes and plates, what else does 250.52(A) recognize as a grounding electrode?

Other listed grounding electrodes
Metal underground gas piping
Aluminum rods
Pool reinforcing steel

NEC Reference: NEC 250.52(A)(6)

Question 22: How long does one cycle of 60 Hz alternating current take?

1.67 ms
8.3 ms
16.7 ms
60 ms

Question 23: Under the 2023 NEC, a dwelling receptacle is installed 4 ft from the outside edge of a shower stall in a room that is not a bathroom. Does it require GFCI protection?

No; only bathroom receptacles need it
Only if within 3 ft of the shower
Yes; within 6 ft of a tub or shower
Only if the shower is outdoors

NEC Reference: NEC 210.8(A)(9)

Question 24: A building has several electrodes bonded together. Where may the grounding electrode conductor be run?

Any convenient bonded electrode
To each electrode separately
Only to the water pipe electrode
Only to a driven ground rod

NEC Reference: NEC 250.64(F)(1)

Question 25: A motor-driven machine receives electrical energy from two separate sources. What disconnecting means are required?

None, if one source is under 30 V
One combined disconnect at the panel
A disconnect for each source
One disconnect, for the larger source only

NEC Reference: NEC 430.113

Question 26: A hard-wired dishwasher has a ½ hp motor. When may the branch-circuit breaker serve as its disconnecting means?

Only if the breaker is 15 A
Never; a separate switch is required
Only in commercial kitchens
If within sight or lockable open

NEC Reference: NEC 422.31(C)

Question 27: What is the maximum supply circuit voltage for an underwater pool luminaire?

15 V between conductors
120 V to ground
150 V between conductors
240 V between conductors

NEC Reference: NEC 680.23(A)(4)

Question 28: A single-phase load uses 3,000 W of true power at a power factor of 0.75. What is its apparent power?

2,250 VA
3,000 VA
3,750 VA
4,000 VA

Question 29: May direct-buried underground cables be spliced without a splice box?

Only under a building
Yes, with listed direct-burial splices
Only for low-voltage cables
No; a splice box is always required

NEC Reference: NEC 300.5(E)

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 — Question List

Question 1: In a commercial building, how is the load calculated for an outlet serving a specific appliance (such as a 1,500 VA coffee urn)?

Question 2: A 1,800 sq ft dwelling has 25 general-use receptacles and 12 lighting outlets. What general lighting load is used?

Question 3: May an outdoor luminaire be supported by a tree?

Question 4: Unless specifically permitted elsewhere, what is the maximum overcurrent protection for 12 AWG aluminum (or copper-clad aluminum) conductors?

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 does a transformer's kVA rating represent?

Question 7: A 3-phase, 4-wire wye system has 480 V phase to phase. What is the phase-to-neutral voltage?

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

Question 9: A fuel cell system used as an emergency power source must be able to carry the full emergency load for at least:

Question 10: A motor with no marked service factor and a 50 °C temperature rise has a nameplate full-load current of 28 A. What is the maximum rating of its separate overload device?

Question 11: A branch circuit supplies a 40 A continuous load. The panelboard and its breaker are listed for operation at 100% of their rating. What minimum conductor ampacity is required?

Question 12: The dwelling small-appliance branch circuits may NOT supply which of these?

Question 13: A raceway contains 45 current-carrying conductors. What adjustment factor applies?

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: A motor control circuit is fed from a separate source. What does 430.75(A) require when the motor disconnecting means is opened?

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: An appliance receptacle outlet for a dwelling clothes washer must be within what distance of the intended location of the appliance?

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: May the grounded (neutral) conductor of underground service conductors be bare copper when installed in a raceway?

Question 20: A ground-level unit in a multifamily building has its own exterior entrance. What outdoor receptacle is required?

Question 21: Besides water pipe, building steel, concrete-encased electrodes, ground rings, rods, pipes and plates, what else does 250.52(A) recognize as a grounding electrode?

Question 22: How long does one cycle of 60 Hz alternating current take?

Question 23: Under the 2023 NEC, a dwelling receptacle is installed 4 ft from the outside edge of a shower stall in a room that is not a bathroom. Does it require GFCI protection?

Question 24: A building has several electrodes bonded together. Where may the grounding electrode conductor be run?

Question 25: A motor-driven machine receives electrical energy from two separate sources. What disconnecting means are required?

Question 26: A hard-wired dishwasher has a ½ hp motor. When may the branch-circuit breaker serve as its disconnecting means?

Question 27: What is the maximum supply circuit voltage for an underwater pool luminaire?

Question 28: A single-phase load uses 3,000 W of true power at a power factor of 0.75. What is its apparent power?

Question 29: May direct-buried underground cables be spliced without a splice box?

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

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