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JOURNEYMAN NEC 2023

Journeyman Electrician Practice Test 30

Free practice test 30 for the journeyman electrician exam. Covers branch circuit ampacity ratings, ground rod contact depth, Type AC cable locations, marina shore power demand factors, auxiliary gutter current limits, power calculations from heat loss, surface metal raceway restrictions, series circuit fundamentals, DC motor speed control, and Ohm's law.

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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 final test covers key code rules and fundamentals. Branch circuit ampacity for 600V+ equipment must be at least 125% of the rated load (NEC 210.19(B)(1)). Ground rods and pipe electrodes must have at least 8 feet in contact with the earth (NEC 250.53(G)). For 6 marina shore power receptacles on one feeder, NEC Table 555.12 gives a 70% demand factor. In sheet metal auxiliary gutters, copper bars must not carry more than 1000A per square inch of cross section (NEC 366.23(A)).

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Journeyman Electrician Practice Test 30 — Question List

Question 1: The computed load of an utilization equipment is 600 VA supplied by 600 volts branch circuit, which of the following is the minimum branch circuit ampere rating?

1.25 ampere
1 ampere
10 ampere
1.15 ampere

NEC Reference: NEC 210.19(B)(1)

Question 2: The Rod and pipe electrodes must installed in such a way that at lest ................ length is in contact with earth soil.

6 ft
8 ft
9 ft
10 ft

NEC Reference: NEC 250.53(G)

Question 3: The Type AC cables shall be permitted to be installed in the following locations?

Exposed work location
concealed work location
damp and wet locations
both concealed and exposed work locations

NEC Reference: NEC 320.10

Question 4: If 6 number shore power receptacles are supplied by one feeder service at marina, which of the following demand factor can be used for calculating total load?

90%
100%
80%
70%

NEC Reference: NEC Table 555.12

Question 5: The current carried continuously in copper bars in sheet metal auxiliary gutters shall not exceed ............... amperes per square inch of cross section of the conductor.

1000 per inch 2
750 per inch 2
700 per inch 2
900 per inch 2

NEC Reference: NEC 366.23

Question 6: The heat loss in a 2 ohm conductor is 800 watts, what is the ampere current flows in the conductor?

20 amperes
40 amperes
10 amperes
15 amperes

Question 7: which of the following conditions or places the Surface metal raceways shall not be permitted to use?

in dry locations
class I division 2 location
in hoistways

NEC Reference: NEC 386.12

Question 8: In a series electrical circuit the current flowing in the circuit elements is same.

True
False

Question 9: Which of the following will be varied to vary the speed of the DC Motor?

field current
armature current
poles will be changed
either field current or armature resistance

Question 10: As per ohms law the current flowing in the circuit is proportional to ....................

Voltage
Power
Resistance
Impedance

Question 11: How much of a ground rod electrode must be in direct contact with the earth?

4 feet
8 feet
6 feet
10 feet

NEC Reference: NEC 250.53(G)

Question 12: Per NEC 366.23(A), current-carrying conductors in sheet metal auxiliary gutters must not carry more than ............. amperes per square inch of cross-section.

750 amperes per square inch
1000 amperes per square inch
700 amperes per square inch
900 amperes per square inch

NEC Reference: NEC 366.23(A)

Question 13: In a DC motor, increasing the field current will .............

Increase motor speed
Decrease motor speed
Have no effect on speed
Reverse motor direction

Question 14: A branch circuit supplies a 600-watt utilization equipment from a 600-volt AC supply. Per NEC 210.19(B)(1), what is the minimum branch circuit ampere rating?

1 ampere
1.25 amperes
10 amperes
1.15 amperes

NEC Reference: NEC 210.19(B)(1)

Question 15: Surface metal raceways installed on a wall in a commercial office are .............

Prohibited — surface metal raceway cannot be used in commercial buildings
Permitted — dry commercial locations are an approved use
Permitted only if concealed within the wall
Prohibited above suspended ceilings

NEC Reference: NEC 386.10

Question 16: A conductor has a resistance of 4 ohms and dissipates 100 watts of heat. What current is flowing in the conductor?

25 amperes
5 amperes
10 amperes
4 amperes

Question 17: According to Ohm's Law, if the voltage in a circuit is doubled while resistance stays constant, the current will .............

Be halved
Double
Remain the same
Quadruple

Question 18: According to Ohm's Law, if the resistance in a circuit is doubled while voltage stays constant, the current will .............

Double
Be halved
Remain the same
Quadruple

Question 19: Type AC (armored) cable may be used for exposed wiring in .............

Wet locations only
Dry locations, both concealed and exposed
Concealed work only
Hazardous classified locations

NEC Reference: NEC 320.10

Question 20: Why is surface metal raceway (Wiremold) prohibited in elevator hoistways?

Because SMR cannot be installed vertically
Because moving elevator components could impact and damage the raceway
Because hoistways have high humidity
Because SMR is not rated for the voltage used in elevators

NEC Reference: NEC 386.12

Question 21: The grounding electrode conductor (GEC) must be .............

Spliced with wire nuts anywhere it is too short
Continuous or spliced only with listed irreversible compression connectors
Always No. 2 AWG copper minimum
Always insulated with green jacket

NEC Reference: NEC 250.64(B)

Question 22: When a grounding electrode conductor is run through a ferrous metal (iron or steel) conduit, what must be done?

Nothing — the conduit does not affect the GEC
Both ends of the ferrous conduit must be bonded to the GEC
The GEC must be insulated in the conduit
Use plastic conduit instead

NEC Reference: NEC 250.64(E)

Question 23: Per NEC 250.50, which of the following grounding electrodes is NOT required to be part of the grounding electrode system if it exists on the premises?

Underground metal water pipe (if 10 ft in soil)
A plastic water pipe (non-conductive) — it cannot serve as an electrode
Concrete-encased electrode in the foundation
Building structural steel frame

NEC Reference: NEC 250.50

Question 24: In a kitchen, countertop space wider than 12 inches that is separated from other countertop areas by a range, refrigerator, or sink must have .............

No receptacle required if it connects to another counter space
At least one receptacle outlet
Two receptacle outlets minimum
A dedicated 20A circuit for that section only

NEC Reference: NEC 210.52(C)(1)

Question 25: The disconnecting means for a motor must be designed so that it can be .............

Red-colored for identification
Locked in the open (off) position
Automatically reset after a power failure
Rated for 200% of motor FLC

NEC Reference: NEC 430.103

Question 26: A motor controller must have a voltage rating .............

Always greater than 600V regardless of circuit
Not less than the voltage of the circuit
Equal to exactly 120V or 240V only
Determined only by the horsepower rating

NEC Reference: NEC 430.83

Question 27: Two batteries of 12V and 6V are connected in series aiding (positive terminal of one to negative terminal of the other). What is the total voltage?

6 volts
18 volts
12 volts
72 volts

Question 28: Per NEC 404.2(C), switch boxes must have a neutral (grounded) conductor available for .............

No reason — switches do not need a neutral
Smart switches, dimmers, and occupancy sensors that need a neutral for power
Grounding the switch toggle for safety
Connecting the switch to ground through the neutral

NEC Reference: NEC 404.2(C)

Question 29: AFCI protection in a dwelling unit living room is required for branch circuits supplying .............

Only receptacle outlets (not lighting)
All outlets and devices including lighting outlets
Only 20A circuits — 15A circuits are exempt
Only circuits with extension cords

NEC Reference: NEC 210.12(A)

Question 30: A marina feeder serves 10 shore power receptacles. Per NEC Table 555.12, what demand factor is used to calculate the feeder load?

100%
70%
80%
60%

NEC Reference: NEC Table 555.12

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 30

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Journeyman Electrician Practice Test 30

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Journeyman Electrician Practice Test 30 — Question List

Question 1: The computed load of an utilization equipment is 600 VA supplied by 600 volts branch circuit, which of the following is the minimum branch circuit ampere rating?

Question 2: The Rod and pipe electrodes must installed in such a way that at lest ................ length is in contact with earth soil.

Question 3: The Type AC cables shall be permitted to be installed in the following locations?

Question 4: If 6 number shore power receptacles are supplied by one feeder service at marina, which of the following demand factor can be used for calculating total load?

Question 5: The current carried continuously in copper bars in sheet metal auxiliary gutters shall not exceed ............... amperes per square inch of cross section of the conductor.

Question 6: The heat loss in a 2 ohm conductor is 800 watts, what is the ampere current flows in the conductor?

Question 7: which of the following conditions or places the Surface metal raceways shall not be permitted to use?

Question 8: In a series electrical circuit the current flowing in the circuit elements is same.

Question 9: Which of the following will be varied to vary the speed of the DC Motor?

Question 10: As per ohms law the current flowing in the circuit is proportional to ....................

Question 11: How much of a ground rod electrode must be in direct contact with the earth?

Question 12: Per NEC 366.23(A), current-carrying conductors in sheet metal auxiliary gutters must not carry more than ............. amperes per square inch of cross-section.

Question 13: In a DC motor, increasing the field current will .............

Question 14: A branch circuit supplies a 600-watt utilization equipment from a 600-volt AC supply. Per NEC 210.19(B)(1), what is the minimum branch circuit ampere rating?

Question 15: Surface metal raceways installed on a wall in a commercial office are .............

Question 16: A conductor has a resistance of 4 ohms and dissipates 100 watts of heat. What current is flowing in the conductor?

Question 17: According to Ohm's Law, if the voltage in a circuit is doubled while resistance stays constant, the current will .............

Question 18: According to Ohm's Law, if the resistance in a circuit is doubled while voltage stays constant, the current will .............

Question 19: Type AC (armored) cable may be used for exposed wiring in .............

Question 20: Why is surface metal raceway (Wiremold) prohibited in elevator hoistways?

Question 21: The grounding electrode conductor (GEC) must be .............

Question 22: When a grounding electrode conductor is run through a ferrous metal (iron or steel) conduit, what must be done?

Question 23: Per NEC 250.50, which of the following grounding electrodes is NOT required to be part of the grounding electrode system if it exists on the premises?

Question 24: In a kitchen, countertop space wider than 12 inches that is separated from other countertop areas by a range, refrigerator, or sink must have .............

Question 25: The disconnecting means for a motor must be designed so that it can be .............

Question 26: A motor controller must have a voltage rating .............

Question 27: Two batteries of 12V and 6V are connected in series aiding (positive terminal of one to negative terminal of the other). What is the total voltage?

Question 28: Per NEC 404.2(C), switch boxes must have a neutral (grounded) conductor available for .............

Question 29: AFCI protection in a dwelling unit living room is required for branch circuits supplying .............

Question 30: A marina feeder serves 10 shore power receptacles. Per NEC Table 555.12, what demand factor is used to calculate the feeder load?

Key NEC References for This Test

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