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JOURNEYMAN NEC 2026

NEC 2026 Journeyman Practice Test 3

Free Online Journeyman Electrician Practice Test — NEC 2026 Edition 3This free 25-question practice test covers service and feeder conductor sizing, dwelling load calculations, feeder tap rules, and the 2026 NEC's arc-energy reduction requirements for circuit breakers and fuses rated 1200A or more. Based on the 2026 National Electrical Code.

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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 2026 NEC. Check your state licensing board to confirm which edition your state has adopted.

How to Use This Practice Test

This NEC 2026 Journeyman Practice Test 3 has 25 questions with detailed answers and NEC references. Take the full test, review every wrong answer, and look up the NEC article it references before moving on.

Tip: This is an open-book exam — tab your NEC index and Articles 210, 250, and 430 before you start.

Topics covered: Branch circuits, grounding, wiring methods, load calculations, and motors.
Passing score: 70–75% (most states). Aim for 80% on practice tests so the real exam feels easy.
Questions: 25 multiple-choice, one correct answer each

Questions

38 min

Time

70%

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NEC 2026 Journeyman Practice Test 3 — Question List

Question 1: Per NEC 230.42(A), ungrounded service-entrance conductors must have an ampacity not less than the noncontinuous load plus what percentage of the continuous load?

100%
110%
125%
150%

NEC Reference: NEC 230.42(A)(1)

Question 2: Per NEC 230.79(D), for a service disconnecting means not covered by the single-circuit, two-circuit, or one-family-dwelling provisions of 230.79 (i.e., "all other" installations), the minimum rating is:

15 amperes
30 amperes
60 amperes
100 amperes

NEC Reference: NEC 230.79(D)

Question 3: Per NEC 230.71(A), the service disconnecting means for each service permitted by 230.2 must consist of not more than how many switches or sets of circuit breakers?

Two
Four
Six
Eight

NEC Reference: NEC 230.71(A)

Question 4: Per NEC 230.90(A), each ungrounded service-entrance conductor must have overload protection:

In series with each ungrounded conductor, rated no higher than the conductor ampacity
Only on the largest ungrounded conductor
Only if the service exceeds 400A
Is not required if a grounding electrode conductor is present

NEC Reference: NEC 230.90(A)

Question 5: Per NEC 230.95, ground-fault protection of equipment is required for solidly grounded wye services with a voltage to ground of more than 150V but not exceeding 1000V, when the service disconnect is rated at:

400 amperes or more
600 amperes or more
1000 amperes or more
2000 amperes or more

NEC Reference: NEC 230.95

Question 6: Per NEC Table 220.42, for a dwelling unit's general lighting load, the first 3000 VA is counted at 100% demand, and the next 117,000 VA is counted at what demand factor?

NEC Reference: NEC Table 220.42

Question 7: Per NEC 220.52(A), each 20-ampere small-appliance branch circuit in a dwelling must be included in the feeder or service load calculation at not less than:

1000 VA
1500 VA
2000 VA
3000 VA

NEC Reference: NEC 220.52(A)

Question 8: Per NEC 220.54, for a single household electric clothes dryer, the load used for feeder or service calculations is the nameplate rating of the dryer or a minimum of:

3000 watts
4000 watts
5000 watts
8000 watts

NEC Reference: NEC 220.54

Question 9: Per NEC Table 220.55, for one household electric range rated at 12 kW or less, the demand load used in the feeder or service calculation is:

3 kW
6 kW
8 kW
12 kW

NEC Reference: NEC Table 220.55

Question 10: Per NEC 220.61(B)(1), the feeder or service neutral load for household electric ranges, wall-mounted ovens, counter-mounted cooking units, and electric dryers may be reduced to what percentage of the demand load determined under 220.54 and 220.55?

50%
70%
80%
100%

NEC Reference: NEC 220.61(B)(1)

Question 11: Per NEC 220.87, the optional method for calculating the load of an addition to an existing dwelling uses the maximum demand data recorded over at least what period, multiplied by 125%, plus the new load?

30 days
90 days
1 year
5 years

NEC Reference: NEC 220.87

Question 12: Per NEC 215.3, a feeder overcurrent protective device must have a rating not less than the noncontinuous load plus what percentage of the continuous load?

100%
110%
125%
150%

NEC Reference: NEC 215.3

Question 13: Per NEC 240.21(B)(1), the "10-foot tap rule" permits a feeder tap conductor to run without overcurrent protection at the tap point, provided — among other conditions — the tap conductor length does not exceed:

6 feet
10 feet
25 feet
50 feet

NEC Reference: NEC 240.21(B)(1)

Question 14: Per NEC 240.21(B)(2), the "25-foot tap rule" requires the tap conductors to have an ampacity of not less than what fraction of the rating of the overcurrent device protecting the feeder conductors?

1/10
1/5
1/3
1/2

NEC Reference: NEC 240.21(B)(2)

Question 15: Per NEC 230.24(B)(2), service-drop conductors rated 300 volts or less, passing over a one-family dwelling's residential driveway, must maintain a minimum vertical clearance above final grade of:

10 feet
12 feet
15 feet
18 feet

NEC Reference: NEC 230.24(B)(2)

Question 16: Per NEC 230.31(A), service-drop conductors must have an ampacity of not less than the:

Load to be served, as determined by Article 220
Ampacity of the largest branch circuit only
Fixed minimum of 100A regardless of load
Utility's standard conductor size, without regard to load

NEC Reference: NEC 230.31(A)

Question 17: Per NEC Article 100, a "Feeder" is defined as all circuit conductors between the:

Service equipment (or other power source) and the final branch-circuit overcurrent device
Utility transformer and the meter only
Panelboard and a single receptacle
Generator and the automatic transfer switch only

NEC Reference: NEC Article 100

Question 18: Per NEC Article 100, "Service" is defined as the:

Conductors and equipment for delivering electric energy from the serving utility to the premises wiring system
Interior branch-circuit wiring only
Grounding electrode system only
Feeder from a subpanel to a detached garage

NEC Reference: NEC Article 100

Question 19: Per the 2026 NEC 240.87(B), which of the following is NOT one of the listed arc-energy reduction methods for circuit breakers rated 1200A or more?

Zone-selective interlocking
Time-current dependent overcurrent setting
Differential relaying
Energy-reducing maintenance switching with a local status indicator

NEC Reference: NEC 2026 — 240.87(B)

Question 20: Per the 2026 NEC 240.87(B)(5), when "instantaneous trip" is used as the arc-energy reduction method, the instantaneous setting must be:

Set lower than the available short-circuit current at the breaker's line terminals
Set higher than the available short-circuit current
Disabled entirely
Set equal to the breaker's continuous current rating

NEC Reference: NEC 2026 — 240.87(B)(5)

Question 21: Per the 2026 NEC 240.87(B)(6), where "instantaneous override" is used as the arc-energy reduction method, the override pickup must be set at no more than what percentage of the available short-circuit current at the breaker's line terminals?

50%
80%
100%
125%

NEC Reference: NEC 2026 — 240.87(B)(6)

Question 22: Per the 2026 NEC 240.67(B)(1), a non-thermal fuse used to satisfy the arc-energy reduction requirement for fuses rated 1200A or more must have a clearing time at the available short-circuit current of:

0.5 seconds or less
0.2 seconds or less
0.07 seconds or less
1 second or less

NEC Reference: NEC 2026 — 240.67(B)(1)

Question 23: Per the 2026 NEC 240.87(C), documentation supporting the arc-energy reduction method chosen for a piece of equipment must be:

Available to those authorized to inspect the installation
Destroyed after commissioning
Sent to the utility company only
Not required to be kept anywhere

NEC Reference: NEC 2026 — 240.87(C)

Question 24: Per the 2026 NEC, the arc-energy reduction method installed on equipment protected by 240.87 must be in service:

Whenever a worker could be exposed to the equipment
Only during scheduled maintenance windows
Only during the first year after installation
Only when the equipment is de-energized

NEC Reference: NEC 2026 — 240.87

Question 25: Per the 2026 NEC 240.87(B)(7), an "approved equivalent means" of arc-energy reduction is accepted based on:

AHJ acceptance after the method demonstrates arc-energy reduction comparable to the listed methods
Manufacturer self-certification alone, with no AHJ review
Utility company sign-off only
No review is required if the equipment is UL listed

NEC Reference: NEC 2026 — 240.87(B)(7)

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.

NEC 2026 Journeyman Practice Test 3

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Key NEC References for This Test

NEC 2026 Journeyman Practice Test 3

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NEC 2026 Journeyman Practice Test 3 — Question List

Question 1: Per NEC 230.42(A), ungrounded service-entrance conductors must have an ampacity not less than the noncontinuous load plus what percentage of the continuous load?

Question 2: Per NEC 230.79(D), for a service disconnecting means not covered by the single-circuit, two-circuit, or one-family-dwelling provisions of 230.79 (i.e., "all other" installations), the minimum rating is:

Question 3: Per NEC 230.71(A), the service disconnecting means for each service permitted by 230.2 must consist of not more than how many switches or sets of circuit breakers?

Question 4: Per NEC 230.90(A), each ungrounded service-entrance conductor must have overload protection:

Question 5: Per NEC 230.95, ground-fault protection of equipment is required for solidly grounded wye services with a voltage to ground of more than 150V but not exceeding 1000V, when the service disconnect is rated at:

Question 6: Per NEC Table 220.42, for a dwelling unit's general lighting load, the first 3000 VA is counted at 100% demand, and the next 117,000 VA is counted at what demand factor?

Question 7: Per NEC 220.52(A), each 20-ampere small-appliance branch circuit in a dwelling must be included in the feeder or service load calculation at not less than:

Question 8: Per NEC 220.54, for a single household electric clothes dryer, the load used for feeder or service calculations is the nameplate rating of the dryer or a minimum of:

Question 9: Per NEC Table 220.55, for one household electric range rated at 12 kW or less, the demand load used in the feeder or service calculation is:

Question 10: Per NEC 220.61(B)(1), the feeder or service neutral load for household electric ranges, wall-mounted ovens, counter-mounted cooking units, and electric dryers may be reduced to what percentage of the demand load determined under 220.54 and 220.55?

Question 11: Per NEC 220.87, the optional method for calculating the load of an addition to an existing dwelling uses the maximum demand data recorded over at least what period, multiplied by 125%, plus the new load?

Question 12: Per NEC 215.3, a feeder overcurrent protective device must have a rating not less than the noncontinuous load plus what percentage of the continuous load?

Question 13: Per NEC 240.21(B)(1), the "10-foot tap rule" permits a feeder tap conductor to run without overcurrent protection at the tap point, provided — among other conditions — the tap conductor length does not exceed:

Question 14: Per NEC 240.21(B)(2), the "25-foot tap rule" requires the tap conductors to have an ampacity of not less than what fraction of the rating of the overcurrent device protecting the feeder conductors?

Question 15: Per NEC 230.24(B)(2), service-drop conductors rated 300 volts or less, passing over a one-family dwelling's residential driveway, must maintain a minimum vertical clearance above final grade of:

Question 16: Per NEC 230.31(A), service-drop conductors must have an ampacity of not less than the:

Question 17: Per NEC Article 100, a "Feeder" is defined as all circuit conductors between the:

Question 18: Per NEC Article 100, "Service" is defined as the:

Question 19: Per the 2026 NEC 240.87(B), which of the following is NOT one of the listed arc-energy reduction methods for circuit breakers rated 1200A or more?

Question 20: Per the 2026 NEC 240.87(B)(5), when "instantaneous trip" is used as the arc-energy reduction method, the instantaneous setting must be:

Question 21: Per the 2026 NEC 240.87(B)(6), where "instantaneous override" is used as the arc-energy reduction method, the override pickup must be set at no more than what percentage of the available short-circuit current at the breaker's line terminals?

Question 22: Per the 2026 NEC 240.67(B)(1), a non-thermal fuse used to satisfy the arc-energy reduction requirement for fuses rated 1200A or more must have a clearing time at the available short-circuit current of:

Question 23: Per the 2026 NEC 240.87(C), documentation supporting the arc-energy reduction method chosen for a piece of equipment must be:

Question 24: Per the 2026 NEC, the arc-energy reduction method installed on equipment protected by 240.87 must be in service:

Question 25: Per the 2026 NEC 240.87(B)(7), an "approved equivalent means" of arc-energy reduction is accepted based on:

Key NEC References for This Test

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