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JOURNEYMAN NEC 2023

Journeyman Electrician Practice Test 4

This is Journeyman Electrician Practice Test 4. It is a free practice test with 24 questions to help you get ready for your journeyman electrician exam. The questions cover basic electrical theory, NEC code rules for conduit, service entrance, wet locations, and load calculations. You need 70% or higher to pass. Each question shows a full explanation after you submit so you know exactly what you got right or wrong.

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 36 min for 30 questions. Skip tough ones and come back.

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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
36 minutes to finish
Pass score is 70% — you need 17 or more correct answers
You will see the full answer and NEC reference after you submit

What This Test Covers

Basic electrical theory — Ohm's Law, voltage, current, and resistance
How to measure current — ammeter connected in series
NEC definitions — concealed conductor, festoon lighting, and more (Article 100)
Lamp spacing from combustible materials (NEC 600.9)
Emergency circuits — wiring rules (NEC 700.10)
PVC conduit burial depth (NEC 515.8)
Overhead service conductor minimum size (NEC 230.23)
Conductor ampacity correction for high temperature
Wet location enclosure type required (NEC 312.2)
Panelboard maximum load rating (NEC 408.30)
Single family dwelling service entrance minimum rating (NEC 230.42)
Lighting fixture weight limit on screw shell (NEC 410.30)
Small motor controller rule (NEC 430.81)
EMT conduit — maximum bends between pull points (NEC 358.26)
Neutral conductor color code (NEC 200.6)
NM cable — where it cannot be used (NEC 334.12)
Working space in front of electrical panel (NEC 110.26)
Voltage drop and electricity cost calculations

Tip: Read each question carefully. Some questions use True or False — make sure you pick the right one.

Questions

36 min

Time

70%

Pass

Timer starts immediately. Progress is auto-saved.

Journeyman Electrician Practice Test 4 — Question List

Question 1: The ohm's law states that in an electrical circuit the current is ...................... proportional to resistance of the circuit.

inversely
directly

Question 2: Which of the following electrical quantity definition is the pressure required to force one ampere electrons through a one ohm resistor?

volt
ohm
power
current

Question 3: In a direct current electric circuit, which of the following effect the current flow?

resistance
capacitive reactance
inductive reactance
All

Question 4: Which of the following is connected in series with the load to measure the required parameter?

watt-hour meter
volt meter
ammeter
power meter

Question 5: When voltage remains constant in the circuit, to double the current flow in circuit, the resistance should be .................

reduced to half
doubled
increased
reduced to one by fourth

Question 6: A concealed conductor in electrical wiring means:

Rendered inaccessible by the structure or finish of the building
Easily accessible conductor
Cable of being reached quickly
A conductor having no cover

Question 7: A string of outdoor lights that is suspended between two points is called as serial lighting.

True
False

Question 8: The minimum spacing between wood or other combustible materials and an incandescent lamp shall be ........ inches

1
1 1/2
2
2 1/2

NEC Reference: NEC 600.9

Question 9: The wiring conductors of two or more emergency circuits supplied from same source shall not be permitted in the same raceway.

True
False

NEC Reference: NEC 700.10

Question 10: PVC conduit shall be permitted to use in underground wiring where it is buried under not less than ........... of cover

2 ft
3 ft
1 ft
4 ft

NEC Reference: NEC 515.8

Question 11: The size of conductors used in over head services with out any exceptions shall not be less than ............ copper.

NO.14 AWG
NO.12 AWG
NO.10 AWG
NO.8 AWG

NEC Reference: NEC 230.23(B)

Question 12: What is allowable ampacity of NO.8 THWN conductor placed in a room where the ambient temperature of the room is at 42 degrees C?

50 amperes
65 amperes
67 amperes
47 amperes

NEC Reference: NEC Table 310.15(B)(16)

Question 13: Enclosures, cabinets, cutout boxes installed in wet locations shall be ...............

Weather proof
Water proof
air tight
Rain tight

NEC Reference: NEC 312.2

Question 14: A 250 amperes panel board may supply the maximum load of ……………………

250 amperes
200 amperes
150 amperes
300 amperes

NEC Reference: NEC 408.30

Question 15: For a single family dwelling unit what is the minimum allowable current rating of 3-wire service-entrance conductors?

120 amperes
100 amperes
150 amperes
200 amperes

NEC Reference: NEC 230.42(B)

Question 16: What shall be the maximum weight of a lighting fixture when it is supported only by the screw shell of the lamp holder?

4 pounds
6 pounds
8 pounds
10 pounds

NEC Reference: NEC 410.30(A)

Question 17: Small motors rated not more than …………….. may use a branch circuit over current protection device as the controller.

1/8 horsepower
1 horse power
¼ horse power
½ horse power

NEC Reference: NEC 430.81(A)

Question 18: What is the delay time permitted to start emergency generators in-case of normal power supply failure?

10 minutes
20 minutes
15 minutes
5 minutes

NEC Reference: NEC 700.12

Question 19: A 2 ft branch conductor with a resistance of 2.5 ohms is supplied with 120 V power supply. If 3 amperes current flows in the conductor then what is voltage drop across the conductor?

5 volts
7.5 volts
3 volts
2 volts

Question 20: A 2 KW electric kettle takes 6 minutes to boil. how much does it cost to boil it twice a day for 30 days at 21 c/kwh?

$2.52
21C
$1.25
42C

Question 21: How many quarter bends are allowed in a run of EMT between pull boxes or conduit bodies?

2 quarter bends
3 quarter bends
4 quarter bends
6 quarter bends

NEC Reference: NEC 358.26

Question 22: Which wire color is used to identify the grounded (neutral) conductor in AC branch circuits?

Black
Red
White
Green

NEC Reference: NEC 200.6(A)

Question 23: Where is NM cable (non-metallic sheathed cable) NOT permitted to be installed?

Inside a dry wood-frame wall
In an attic space
In a concealed space in a house
In a wet or damp location

NEC Reference: NEC 334.12(B)(4)

Question 24: What is the minimum depth of clear working space required in front of a 120/240 volt electrical panel?

1 foot
2 feet
3 feet
4 feet

NEC Reference: NEC 110.26(A)(1)

Question 25: When resistors are connected in parallel, what happens to the total circuit resistance?

It increases
It stays the same
It equals the largest resistor
It decreases below the smallest resistor

Question 26: What is the maximum standard overcurrent protection allowed for a No.12 AWG copper conductor?

15 amperes
20 amperes
25 amperes
30 amperes

NEC Reference: NEC 240.4(D)(5)

Question 27: Metal outlet boxes in a wiring system must be connected to the equipment grounding conductor.

True
False

NEC Reference: NEC 250.148

Question 28: Rigid metal conduit (RMC) shall be supported at intervals not exceeding how many feet?

6 feet
8 feet
10 feet
15 feet

NEC Reference: NEC 344.30(B)(1)

Question 29: A circuit requires 35 amperes of overcurrent protection. What is the next standard size overcurrent device above 35 amperes?

38 amperes
40 amperes
45 amperes
50 amperes

NEC Reference: NEC 240.6(A)

Question 30: What is the main purpose of bonding in an electrical system?

To increase the voltage in the circuit
To create a low-impedance path so fault current can trip the overcurrent device
To reduce the current in the circuit
To stop electricity from flowing to ground

NEC Reference: NEC Article 100

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 4

How this test works

Frequently Asked Questions

Before You Start

What This Test Covers

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Key NEC References for This Test

Journeyman Electrician Practice Test 4

How this test works

Frequently Asked Questions

Is this Journeyman Electrician Practice Test 4 free?

How many questions are on the Journeyman Electrician exam?

What score do you need to pass the Journeyman exam?

What NEC edition is this test based on?

Before You Start

What This Test Covers

Student Reviews

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Journeyman Electrician Practice Test 4 — Question List

Question 1: The ohm's law states that in an electrical circuit the current is ...................... proportional to resistance of the circuit.

Question 2: Which of the following electrical quantity definition is the pressure required to force one ampere electrons through a one ohm resistor?

Question 3: In a direct current electric circuit, which of the following effect the current flow?

Question 4: Which of the following is connected in series with the load to measure the required parameter?

Question 5: When voltage remains constant in the circuit, to double the current flow in circuit, the resistance should be .................

Question 6: A concealed conductor in electrical wiring means:

Question 7: A string of outdoor lights that is suspended between two points is called as serial lighting.

Question 8: The minimum spacing between wood or other combustible materials and an incandescent lamp shall be ........ inches

Question 9: The wiring conductors of two or more emergency circuits supplied from same source shall not be permitted in the same raceway.

Question 10: PVC conduit shall be permitted to use in underground wiring where it is buried under not less than ........... of cover

Question 11: The size of conductors used in over head services with out any exceptions shall not be less than ............ copper.

Question 12: What is allowable ampacity of NO.8 THWN conductor placed in a room where the ambient temperature of the room is at 42 degrees C?

Question 13: Enclosures, cabinets, cutout boxes installed in wet locations shall be ...............

Question 14: A 250 amperes panel board may supply the maximum load of ……………………

Question 15: For a single family dwelling unit what is the minimum allowable current rating of 3-wire service-entrance conductors?

Question 16: What shall be the maximum weight of a lighting fixture when it is supported only by the screw shell of the lamp holder?

Question 17: Small motors rated not more than …………….. may use a branch circuit over current protection device as the controller.

Question 18: What is the delay time permitted to start emergency generators in-case of normal power supply failure?

Question 19: A 2 ft branch conductor with a resistance of 2.5 ohms is supplied with 120 V power supply. If 3 amperes current flows in the conductor then what is voltage drop across the conductor?

Question 20: A 2 KW electric kettle takes 6 minutes to boil. how much does it cost to boil it twice a day for 30 days at 21 c/kwh?

Question 21: How many quarter bends are allowed in a run of EMT between pull boxes or conduit bodies?

Question 22: Which wire color is used to identify the grounded (neutral) conductor in AC branch circuits?

Question 23: Where is NM cable (non-metallic sheathed cable) NOT permitted to be installed?

Question 24: What is the minimum depth of clear working space required in front of a 120/240 volt electrical panel?

Question 25: When resistors are connected in parallel, what happens to the total circuit resistance?

Question 26: What is the maximum standard overcurrent protection allowed for a No.12 AWG copper conductor?

Question 27: Metal outlet boxes in a wiring system must be connected to the equipment grounding conductor.

Question 28: Rigid metal conduit (RMC) shall be supported at intervals not exceeding how many feet?

Question 29: A circuit requires 35 amperes of overcurrent protection. What is the next standard size overcurrent device above 35 amperes?

Question 30: What is the main purpose of bonding in an electrical system?

Key NEC References for This Test

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