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JOURNEYMAN NEC 2023

Journeyman Electrician Practice Test 23

Free practice test 23 for the journeyman electrician exam. Covers voltage limits for lampholders in industrial settings, demand factor rules, rigid metal conduit, general lighting loads, box fill calculations, EMT limitations, and circuit theory.

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Frequently Asked Questions

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.

This test covers NEC code rules and circuit theory. Key points: In industrial locations, voltage between conductors on lampholders can be up to 300V (NEC 210.6(C)) — higher than the 150V limit for dwelling units. General lighting load for a dwelling unit is 3 VA per square foot (NEC Table 220.12). Rigid Metal Conduit (RMC) is the only metallic conduit type permitted in ALL locations including hazardous locations. NEC 314.16(B)(5) counts all equipment grounding conductors entering a metal box as a single conductor for box fill calculations.

30

Questions

45 min

Time

70%

Pass

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Journeyman Electrician Practice Test 23 — Question List

Question 1: What is the maximum allowable voltage in between the conductors on branch circuits supplying lamp holders in industrial establishments?

150 Volts
300 volts
240 volts
120 volts

Question 2: For branch circuits and service entrance wires demand factor may be applied in calculating ampacity requirements but for feeder conductors.

True
False

Question 3: Threaded rigid metal conduit wiring is acceptable in all locations irrespective of their classification.

True
False

Question 4: The general lighting load in Volt-ampere/Sq.Foot that a church building requires is ..............

1 Volt-Ampere/ Sq.Foot
2 Volt-Ampere/ Sq.Foot
3 Volt-Ampere/ Sq.Foot
4 Volt-Ampere/ Sq.Foot

NEC Reference: NEC 220.12

Question 5: What is the total branch circuit load calculated for general illumination for a 3000 square feet dwelling house?

5000 Volt-Amperes
9000 Volt-Amperes
3000 Volt-Amperes
7000 Volt-Amperes

NEC Reference: NEC 220.12

Question 6: If a 120 Volts electric dryer which is plugged into a receptacle will always trip, if the receptacle is protected with GFCI.

True
False

Question 7: A 4-inch square metal box with a depth of 1 1/4 inches has a minimum volume of which of the following?

21 inches
18 inches
16 inches
30 inches

NEC Reference: NEC Table 314.16(A)

Question 8: When one or more equipment grounding conductors or equipment bonding jumpers enters in a metal box can be considered as how many number of total conductors in a metal box?

single conductor
double conductor
half of the number of conductors

NEC Reference: NEC 314.16(B)(5)

Question 9: EMT conduit can be used in all the locations including hazardous locations.

True
False

NEC Reference: NEC 358.12

Question 10: In an series electrical quantity which of the following electrical parameter has the same value?

Current
Voltage
Power

Question 11: Per NEC 210.6(B), luminaires (lighting fixtures) in commercial and industrial buildings may be supplied by branch circuits with a voltage not exceeding ............. to ground.

150 volts
277 volts to ground
480 volts
120 volts

NEC Reference: NEC 210.6(B)

Question 12: What is the general lighting unit load for an office building per NEC Table 220.12?

2 VA per square foot
3.5 VA per square foot
3 VA per square foot
5 VA per square foot

NEC Reference: NEC Table 220.12

Question 13: When calculating the feeder demand for lighting load in a dwelling unit using NEC Table 220.42, what demand factor applies to the first 3000 VA?

35%
100%
50%
25%

NEC Reference: NEC Table 220.42

Question 14: Rigid Metal Conduit (RMC) is permitted to be encased in concrete.

True
False

NEC Reference: NEC 344.10(B)

Question 15: For box fill calculations, a switch or receptacle device that is mounted in a box is counted as how many conductors?

One conductor
Two conductors of the largest wire connected to it
Zero — devices are not counted
Three conductors

NEC Reference: NEC 314.16(B)(4)

Question 16: For box fill calculations, internal cable clamps inside a metal box count as how many conductors?

Zero — clamps are not counted
One conductor (all clamps together)
One conductor per clamp
Two conductors total

NEC Reference: NEC 314.16(B)(2)

Question 17: Electrical Metallic Tubing (EMT) is permitted in which of the following locations?

Class I, Division 1 hazardous locations
Exposed work in dry and damp locations
Embedded in concrete under the earth
Locations with severe physical damage risk

NEC Reference: NEC 358.12

Question 18: In a dwelling unit bathroom, GFCI protection is required for which receptacles?

Only those within 3 feet of the sink
All 125-volt receptacles in the bathroom
Only the receptacle near the mirror
Only those on the wall with the sink

NEC Reference: NEC 210.8(A)(1)

Question 19: Three 30-ohm resistors are connected in parallel. What is the total (equivalent) resistance?

90 ohms
10 ohms
30 ohms
3 ohms

Question 20: Three resistors of 5 ohms, 10 ohms, and 15 ohms are connected in series. What is the total resistance?

5 ohms
30 ohms
15 ohms
10 ohms

Question 21: A 120V circuit with 30A of load has a conductor resistance of 0.4 ohms. What is the voltage drop in the conductor?

0.4 volts
12 volts
30 volts
4 volts

Question 22: EMT conduit must be supported at intervals not exceeding .............

4 feet
10 feet
6 feet
8 feet

NEC Reference: NEC 358.30(A)

Question 23: Per NEC 314.17, conductors entering boxes must be protected from abrasion at the point of .............

Exit only
Entry into the box
Both entry and exit
No protection is required

NEC Reference: NEC 314.17

Question 24: Can Electrical Metallic Tubing (EMT) serve as the equipment grounding conductor (EGC)?

True
False

NEC Reference: NEC 250.118(4)

Question 25: When connecting conductors to equipment terminals rated at 60°C, what type of conductor should be used?

Any conductor regardless of temperature rating
A conductor with at least a 60°C temperature rating, derated to 60°C ampacity
Only 90°C rated conductors for maximum safety
Temperature rating of conductor does not matter at terminals

NEC Reference: NEC 110.14(C)

Question 26: A 240-volt circuit has a total resistance of 40 ohms. What is the current flowing in the circuit?

40 amperes
6 amperes
9600 amperes
280 amperes

Question 27: A conductor with 5 ohms of resistance carries 10 amperes of current. How much power is dissipated as heat in that conductor?

50 watts
500 watts
250 watts
1000 watts

Question 28: Where must the service disconnecting means be located?

Any location convenient to the electrical contractor
Outside the building or inside nearest the entry point of service conductors
Always in the basement
In the main electrical room regardless of location

NEC Reference: NEC 230.70(A)

Question 29: A single-phase transformer has a primary voltage of 480V and a secondary voltage of 120V. If the secondary full load current is 100A, what is the transformer kVA rating?

48 kVA
12 kVA
6 kVA
100 kVA

Question 30: A metal underground water pipe used as a grounding electrode must be in direct contact with the earth for at least .............

5 feet
10 feet
6 feet
25 feet

NEC Reference: NEC 250.52(A)(1)

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.

EXAM CARD JOURNEYMAN

Questions30

Time limit45 min

Pass score70%

Code editionNEC 2023

DifficultyIntermediate

Last reviewedJun 2026

Timer starts immediately. Progress is auto-saved.

Source: NEC 2026 (NFPA 70)