Previous Journeyman Electrician Practice Test 1 Next Journeyman Electrician Practice Test 3

JOURNEYMAN NEC 2023

Journeyman Electrician Practice Test 2

This is Journeyman Electrician Practice Test 2. It is a free practice test with 30 questions to help you get ready for your journeyman electrician exam. The questions cover conduit fill rules, hazardous locations, wireway installation, conductor sizing, and basic electrical theory. You need 70% or higher to pass. Every question shows a full explanation with NEC reference after you submit.

How this test works

Read each question carefully

Look for absolute words like always / never — they often distinguish the right answer.

Manage your time

You have 45 min for 30 questions. Skip tough ones and come back.

Progress is auto-saved

Your answers are saved locally — a page refresh won't lose your work.

Review your answers

After submitting you'll see every explanation and your NEC references.

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.

Before You Start

30 questions — multiple choice
51 minutes to finish (timer starts when you begin)
Pass score is 70% — you need at least 24 correct answers
Full explanation with NEC section reference shown after you submit

Topics in This Test

Conduit fill percentage — how many conductors fit in a conduit (NEC Table 1)
Outlet box conductor fill — how many wires allowed in a box (NEC 314.16)
Wireway support spacing — horizontal and vertical rules (NEC 376.30)
Hazardous location classifications — Class I Division 1 and 2 (NEC 516.3)
Continuous load definition — what the NEC means by "continuous" (Article 100)
Motor disconnecting means sizing — 115% rule (NEC 440.12)
Conductor resistance — how wire diameter affects resistance
Festoon lighting minimum conductor size (NEC 225.6)
Ampacity correction for high ambient temperature (NEC 310.15)
3-phase motor branch circuit conductor sizing (NEC 430.250)
Voltage drop calculations in branch circuits
Transformer turns ratio and secondary voltage
Service entrance conduit sealing (NEC 230.8)
Heating cable wattage limits for concrete floors (NEC 424.4)
Computer room underfloor wiring methods (NEC 645)
Dwelling unit laundry circuit requirements (NEC 210.52)

Tip: Pay close attention to calculation questions — most have a formula in the explanation. If you learn the formula, you can solve any version of that question on the real exam.

Questions

45 min

Time

70%

Pass

Timer starts immediately. Progress is auto-saved.

Student Reviews 4.0 / 5 · 1 review

Derek Holloway

Good practice questions overall. Some of the grounding and bonding ones are tricky which is exactly what you want. My only gripe is I wish there were more calculations but for code lookup stuff this is great.

Journeyman Electrician Practice Test 2 — Question List

Question 1: A continuous load is load where the maximum current is expected to continue for ............ hours or more.

Question 2: If the diameter of the branch conductor is doubled, the resistance of conductor .......

increases
halve
be unchanged
decreases

Question 3: The ungrounded ducts or conduits should be sealed before entering buildings.

True
False

NEC Reference: NEC 230.8

Question 4: How many 12 AWG conductors are allowed in an 12.5 in<sup>3</sup> round octagonal outlet box?

NEC Reference: NEC 12.5

Question 5: The snap switches equipped in the panel boards are rated at 25 amperes, these switches must be protected not in excess of ..........................

200 amperes
30 amperes
120 amperes
150 amperes

NEC Reference: NEC 408.36(A)

Question 6: The vertically run metal wire-ways shall be surely supported at intervals not exceeding ............. ft of wire way and shall not have more than one joint between supports.

NEC Reference: NEC 376.30

Question 7: The interior of any dip tank can be considered as ................... location

Class1, Division1
Class1 Division 2
Class 2 Division 1
Class2 Division 2

NEC Reference: NEC 516.3

Question 8: Over head conductors for festoon lighting shall not be smaller than .............. .

8 AWG
6 AWG
12 AWG
10 AWG

NEC Reference: NEC 225.6(A)(2)

Question 9: What is the maximum standard over current device rating used to protect instrument circuits located in a panel board?

15 amperes
30 amperes
200 amperes
150 amperes

NEC Reference: NEC 408.52

Question 10: Which of the following units always requires a dedicated 20-ampere laundry branch circuit?

industrial wash room
Dwelling unit
Commercial utility room
Motel unit

NEC Reference: NEC 210.52(F)

Question 11: Which of the following wiring methods that can be used for underfloor wiring in computer room in a building?

Rigid conduit
electrical metallic tubing
electrical non metallic tubing
All the options are correct

Question 12: What is the maximum constant wattage per linear meter allowed for heating cables embedded in concrete?

54
16 1/2
36
22 1/2

NEC Reference: NEC 424.4(A)

Question 13: What is the minimum percentage rated voltage that a storage battery should supply the emergency load?

80℅
85%
82 1/5 %
87 1/2 %

Question 14: A 120-volt source is supplying a lamp with a resistance of 172 ohms. What is the current flow in the circuit?

0.7 amperes
1.2 amperes
0.5 amperes
0.9 amperes

Question 15: What is the total voltage drop in a 12 AWG conductor that supply a 18 ampere load which is located 50 feet from the power source? The resistance of conductor is 2 ohm/1000 feet.

1.8 volts
3.6 volts
18 volts
36 volts

Question 16: If the replacement compressor motor draws 35 amperes current, what is the minimum rating for disconnecting means used to protect the motor?

40.25 amperes
42 amperes
38.5 amperes
43.75 amperes

NEC Reference: NEC 440.12(A)(1)

Question 17: What is the corrected ampacity of a 2/0 THWN conductors in a dry location. If the ambient temperature of location is 40<sup>0</sup>C?

170 Amperes
195 Amperes
180 Amperes
160 Amperes

NEC Reference: NEC 310.15(B)(16)

Question 18: What is the minimum size THWN branch circuit conductor required for a 20 HP, 480-volt, 3 Phase Induction type squirrel cage motor with nameplate FLI of 26.5 amps?

10 AWG
8 AWG
12 AWG
6 AWG

NEC Reference: NEC 26.5

Question 19: A 8 AWG conductor is suitable to use at maximum ............ KW supplied with a 120 volts power source?

6000
300
6
30

NEC Reference: NEC 310.15(B)(16)

Question 20: A transformer having 1600 turns in primary winding and 400 turns in secondary winding is supplied with 120 volts AC. What is its secondary voltage.

40 volts
30 volts
480 volts
120 volts

Question 21: All conductors of the same circuit must be grouped together in the same raceway or cable.

True
False

NEC Reference: NEC 300.3(B)

Question 22: When 4 to 6 current-carrying conductors are in the same conduit, the conductor ampacity must be derated to what percentage?

NEC Reference: NEC 310.15(B)(3)(a)

Question 23: What is the minimum clearance of overhead service conductors above a sidewalk or pedestrian walkway for a 120-volt system?

8 feet
10 feet
12 feet
15 feet

NEC Reference: NEC 230.24(B)(1)

Question 24: When a circuit is tested with an ohmmeter and the reading shows infinity (∞), this means the circuit has a ...

Short circuit
Normal resistance
Open circuit
Ground fault

Question 25: What is the maximum rating of an inverse time circuit breaker for motor branch circuit short circuit protection, expressed as a percentage of the motor full-load current?

125%
150%
250%
175%

NEC Reference: NEC Table 430.52

Question 26: What is the minimum size copper grounding electrode conductor (GEC) required for a service supplied by No.3/0 AWG copper service entrance conductors?

6 AWG
4 AWG
2 AWG
8 AWG

NEC Reference: NEC Table 250.66

Question 27: When conductors of different voltage systems share the same raceway, what does the NEC require?

Different voltage systems can never share a raceway
All conductors must be insulated for the highest voltage in the raceway
Conductors must be separated by at least half an inch
A divider must be installed between the systems

NEC Reference: NEC 300.3(C)(1)

Question 28: A branch circuit conductor must have an ampacity of not less than what percentage of the continuous load?

100%
110%
125%
150%

NEC Reference: NEC 210.19(A)

Question 29: A circuit has a 240 volt source and draws 20 amperes. What is the resistance of the circuit?

4,800 ohms
12 ohms
260 ohms
4.8 ohms

Question 30: What does a watt-hour meter measure?

Instantaneous power in a circuit
Total electrical energy used over time
Current flowing in the circuit
Voltage at the point of service

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.