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JOURNEYMAN NEC 2023

Journeyman Electrician Practice Test 33

Free Online Journeyman Electrician Exam Practice Test — 33This free 30-question practice test covers a wide range of journeyman electrician exam topics based on the 2023 NEC, including load calculations, lampholders, emergency transfer switches, conduit fill, DC motor theory, AC circuit fundamentals, grounding, GFCI requirements, service equipment, and more.

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Yes — completely free with no account required. All questions include detailed explanations and NEC references.

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 to review before starting: In commercial occupancies, multi-outlet equipment with 4 or more outlets counts at 90 VA per outlet (NEC 220.14(I)). Heavy-duty lampholders on circuits above 20A must be rated at least 660 VA (NEC 210.21(A)). Emergency system transfer switches must be electrically operated and mechanically held (NEC 700.5(C)). Conduit fill for 3 or more conductors must not exceed 40% (NEC Chapter 9, Table 1). GFCI protection is required in dwelling garages (NEC 210.8(A)(2)) and unfinished basements (NEC 210.8(A)(5)). The minimum service disconnect for a single-family dwelling is 100A (NEC 230.79(C)). Overhead service-drop conductors must clear driveways by 12 feet (NEC 230.24(B)(2)).

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Journeyman Electrician Practice Test 33 — Question List

Question 1: What is the calculated load for a quad receptacle manufactured in a single piece of equipment to use in retails shop?

360 Volt-Ampere
720 Volt-Ampere
800 Volt-Ampere
180 Volt-Ampere

NEC Reference: NEC 220.14(I)

Question 2: In a 3-wire, single-phase system, each hot conductor is 120 V to the neutral. What is the voltage between the two hot conductors?

120 V
208 V
240 V
480 V

Question 3: What is the minimum volt-ampere rating included for heavy duty lamp holder?

660 volt-ampere
560 volt-ampere
460 volt-ampere
760 volt-ampere

NEC Reference: NEC 210.21(A)

Question 4: Which of the following type of automatic transfer switches shall be used in emergency power supply systems?

Electrically operated
Manually Operated
Electrically operated and mechanically held
Electrically operated and electrically held

NEC Reference: NEC 700.5(C)

Question 5: When calculating conduit fill, how are equipment grounding conductors treated?

Only bare EGCs are counted
They count as half a conductor
They are ignored
They are included

NEC Reference: NEC Chapter 9, Table 1, Note 3

Question 6: An electrical battery delivers 12 amperes for 12 hrs. What is its Ampere Hour rating?

144 Ah
12 Ah
1 Ah
120 Ah

Question 7: A current of 2 A flows through a 50 Ω resistor. How much power does the resistor dissipate?

5,000 W
200 W
100 W
25 W

Question 8: An additional resistor is connected in parallel with an existing circuit. What happens to the total resistance?

It stays the same
It decreases
It doubles
It increases

Question 9: Which instrument is used to test the insulation resistance of conductors and motor windings?

Megohmmeter
Frequency meter
Wattmeter
Clamp-on ammeter

Question 10: Per NEC 210.63, a 125-volt, 15- or 20-ampere receptacle outlet must be installed for heating, air-conditioning, and refrigeration (HVAC/R) equipment. How close must this outlet be to the equipment?

Within 10 feet
Within 25 feet
Within 50 feet
Within 100 feet

NEC Reference: NEC 210.63

Question 11: If the length of a copper conductor is doubled (while keeping the same wire gauge), what happens to its resistance?

Resistance is halved
Resistance stays the same
Resistance doubles
Resistance quadruples

Question 12: What voltage rating must be marked on a circuit breaker?

Only the control circuit voltage
Exactly 600 V on every breaker
Any voltage, if the breaker is listed
At least the nominal system voltage

NEC Reference: NEC 240.83(E)

Question 13: The size of the grounding electrode conductor (GEC) for an AC service is determined by _____ .

Always No. 8 AWG regardless of service size
The size of the largest service entrance conductor per NEC Table 250.66
Always equal in size to the service entrance conductor
The size of the neutral conductor only

NEC Reference: NEC Table 250.66

Question 14: For a torque motor, which current is used to size the branch-circuit conductors and protection?

The nameplate locked-rotor current
125% of the running current only
The no-load current
The Table 430.250 full-load current

NEC Reference: NEC 430.6(B)

Question 15: Per NEC 220.51, fixed electric space heating loads in a load calculation shall be calculated at _____ percent of the total connected load.

65%
80%
100%
125%

NEC Reference: NEC 220.51

Question 16: A 150 kVA dry-type transformer is installed outdoors next to a wood-frame building. When may it be closer than 12 in. to the building's combustible materials?

If it is in a NEMA 1 enclosure
Class 155+ insulation, fully enclosed
If it is rated under 600 V
Never, under any condition

NEC Reference: NEC 450.22

Question 17: Which values must be marked on the nameplate of multimotor air-conditioning equipment (such as a packaged rooftop unit)?

The installer's license number
Only the refrigerant type and charge
Minimum circuit ampacity and max OCPD
Only the horsepower of each motor

NEC Reference: NEC 440.4(B)

Question 18: Under the 2023 NEC, which of these dwelling locations requires GFCI protection for receptacles?

Hallways
Bedrooms
Living rooms
Indoor damp and wet locations

NEC Reference: NEC 210.8(A)(11)

Question 19: What is the unit of electric charge?

Ampere
Coulomb
Volt
Ohm

Question 20: How must each service disconnecting means be marked?

With a red handle
With the utility account number
Permanently marked as a service disconnect
It needs no marking

NEC Reference: NEC 230.70(B)

Question 21: What is the minimum vertical clearance of overhead service conductors over railroad tracks?

15 ft
18 ft
22 ft
24.5 ft

NEC Reference: NEC 230.24(B)(5)

Question 22: In a Class I, Division 1 location, when may PVC conduit be used underground?

Concrete-encased with 24 in. cover
Whenever it is Schedule 80 PVC
Never in any form
When buried at least 18 in. deep

NEC Reference: NEC 501.10(A)(1)(a) Exception

Question 23: GFCI protection is required for 125-volt through 250-volt receptacles in which dwelling location?

Bedrooms
Closets
Dining rooms
Boathouses

NEC Reference: NEC 210.8(A)(8)

Question 24: When may working space depths smaller than Table 110.26(A)(1) be permitted?

By special permission, at 30 V rms or less
In any dwelling unit
For equipment rated under 100 A
Never; the table always applies

NEC Reference: NEC 110.26(A)(1)(b)

Question 25: A 2-wire NM cable is run from a ceiling box to a wall switch (a switch loop). The white conductor is used as the ungrounded (hot) conductor feeding the switch. Per NEC 200.7(C)(1), this white conductor must be _____ at each location where it is accessible.

Left as-is — white wire can always serve as a hot conductor
Permanently re-identified with black tape or other marking
Replaced with a black conductor before installation
Insulated with green tape to show it is grounded

NEC Reference: NEC 200.7(C)(1)

Question 26: What is the minimum size of overhead service conductors (other than for limited loads)?

8 AWG Cu or 6 AWG Al
10 AWG copper
12 AWG copper
14 AWG copper

NEC Reference: NEC 230.23(B)

Question 27: In a purely inductive AC circuit, the current _____ the voltage by 90 degrees.

Leads
Is in phase with
Lags
Is 180 degrees from

Question 28: A permanently installed electric baseboard heater has a factory-installed receptacle outlet. Which statement is correct?

It may never count toward required outlets
It must be a 240-volt receptacle
It counts, but not on the heater circuit
It may be fed from the heater circuit

NEC Reference: NEC 424.9

Question 29: Outlets other than receptacles, lighting and switching (such as for a remote-control or signaling device) must be at least how far from the inside walls of a pool?

5 ft
6 ft
10 ft
20 ft

NEC Reference: NEC 680.22(D)

Question 30: When a load is calculated on a VA-per-square-foot basis, how must it be distributed among the multioutlet branch circuits in the panelboard?

All on one circuit
Evenly among the multioutlet circuits
On as few circuits as possible
Any way the installer chooses

NEC Reference: NEC 210.11(B)

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 33

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Journeyman Electrician Practice Test 33 — Question List

Question 1: What is the calculated load for a quad receptacle manufactured in a single piece of equipment to use in retails shop?

Question 2: In a 3-wire, single-phase system, each hot conductor is 120 V to the neutral. What is the voltage between the two hot conductors?

Question 3: What is the minimum volt-ampere rating included for heavy duty lamp holder?

Question 4: Which of the following type of automatic transfer switches shall be used in emergency power supply systems?

Question 5: When calculating conduit fill, how are equipment grounding conductors treated?

Question 6: An electrical battery delivers 12 amperes for 12 hrs. What is its Ampere Hour rating?

Question 7: A current of 2 A flows through a 50 Ω resistor. How much power does the resistor dissipate?

Question 8: An additional resistor is connected in parallel with an existing circuit. What happens to the total resistance?

Question 9: Which instrument is used to test the insulation resistance of conductors and motor windings?

Question 10: Per NEC 210.63, a 125-volt, 15- or 20-ampere receptacle outlet must be installed for heating, air-conditioning, and refrigeration (HVAC/R) equipment. How close must this outlet be to the equipment?

Question 11: If the length of a copper conductor is doubled (while keeping the same wire gauge), what happens to its resistance?

Question 12: What voltage rating must be marked on a circuit breaker?

Question 13: The size of the grounding electrode conductor (GEC) for an AC service is determined by _____ .

Question 14: For a torque motor, which current is used to size the branch-circuit conductors and protection?

Question 15: Per NEC 220.51, fixed electric space heating loads in a load calculation shall be calculated at _____ percent of the total connected load.

Question 16: A 150 kVA dry-type transformer is installed outdoors next to a wood-frame building. When may it be closer than 12 in. to the building's combustible materials?

Question 17: Which values must be marked on the nameplate of multimotor air-conditioning equipment (such as a packaged rooftop unit)?

Question 18: Under the 2023 NEC, which of these dwelling locations requires GFCI protection for receptacles?

Question 19: What is the unit of electric charge?

Question 20: How must each service disconnecting means be marked?

Question 21: What is the minimum vertical clearance of overhead service conductors over railroad tracks?

Question 22: In a Class I, Division 1 location, when may PVC conduit be used underground?

Question 23: GFCI protection is required for 125-volt through 250-volt receptacles in which dwelling location?

Question 24: When may working space depths smaller than Table 110.26(A)(1) be permitted?

Question 25: A 2-wire NM cable is run from a ceiling box to a wall switch (a switch loop). The white conductor is used as the ungrounded (hot) conductor feeding the switch. Per NEC 200.7(C)(1), this white conductor must be _____ at each location where it is accessible.

Question 26: What is the minimum size of overhead service conductors (other than for limited loads)?

Question 27: In a purely inductive AC circuit, the current _____ the voltage by 90 degrees.

Question 28: A permanently installed electric baseboard heater has a factory-installed receptacle outlet. Which statement is correct?

Question 29: Outlets other than receptacles, lighting and switching (such as for a remote-control or signaling device) must be at least how far from the inside walls of a pool?

Question 30: When a load is calculated on a VA-per-square-foot basis, how must it be distributed among the multioutlet branch circuits in the panelboard?

Key NEC References for This Test

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