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JOURNEYMAN NEC 2026

NEC 2026 Journeyman Practice Test 2

Free Online Journeyman Electrician Practice Test — NEC 2026 Edition 2This free 25-question practice test covers grounding electrode systems, bonding jumpers, grounding electrode and equipment grounding conductor sizing, and the 2026 NEC's emergency disconnect requirements for one- and two-family dwellings under 230.85. Based on the 2026 National Electrical Code.

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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 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 2 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

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70%

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NEC 2026 Journeyman Practice Test 2 — Question List

Question 1: Per NEC 250.24(A), the service grounded (neutral) conductor must be connected to the grounding electrode system at:

Each panelboard throughout the building
The service disconnecting means, or ahead of it
Only at the meter base
Only at the utility transformer

NEC Reference: NEC 250.24(A)(1)

Question 2: A dry-type transformer creates a separately derived system inside a commercial building. Per NEC 250.30, this system requires its own:

System bonding jumper and grounding electrode connection
Connection to the building's water meter only
No additional grounding — it uses the service ground
A dedicated lightning arrestor only

NEC Reference: NEC 250.30(A)

Question 3: Per NEC 250.50, where multiple grounding electrodes described in 250.52(A) are present at a building — for example, a metal underground water pipe and a concrete-encased electrode — the NEC requires they be:

Bonded together to form the grounding electrode system
Kept electrically isolated from each other
Used one at a time, at the installer's discretion
Removed except for the one closest to the panel

NEC Reference: NEC 250.50

Question 4: Per NEC 250.52(A)(3), a concrete-encased electrode ("Ufer ground") qualifies as a grounding electrode when it includes at least 20 feet of bare copper conductor not smaller than:

8 AWG
6 AWG
4 AWG
2 AWG

NEC Reference: NEC 250.52(A)(3)

Question 5: A single ground rod electrode is installed and measures 40 ohms of resistance to earth. Per NEC 250.53(A)(2), what must the installer do?

Nothing — 40 ohms is acceptable
Install a second rod at least 6 feet away
Replace the rod with a larger-diameter rod
Add a lightning arrestor

NEC Reference: NEC 250.53(A)(2)

Question 6: Per NEC 250.66(B), where the grounding electrode conductor connects only to a concrete-encased electrode, the GEC is not required to be larger than:

8 AWG copper
6 AWG copper
4 AWG copper
2 AWG copper

NEC Reference: NEC 250.66(B)

Question 7: Per NEC Table 250.66, for service-entrance conductors of 2/0 AWG copper, the minimum grounding electrode conductor size is:

8 AWG copper
6 AWG copper
4 AWG copper
2 AWG copper

NEC Reference: NEC Table 250.66

Question 8: Per NEC Table 250.122, a branch circuit protected by a 100-ampere overcurrent device requires a copper equipment grounding conductor no smaller than:

10 AWG
8 AWG
6 AWG
4 AWG

NEC Reference: NEC Table 250.122

Question 9: Per NEC 250.28, the main bonding jumper connecting the service equipment enclosure to the grounded (neutral) conductor must be sized:

Per Table 250.102(C)(1), based on the largest ungrounded service conductor
Always 6 AWG copper regardless of service size
Half the size of the largest ungrounded conductor
Per the panel manufacturer's label only

NEC Reference: NEC 250.28(D)

Question 10: A detached workshop is supplied by a feeder from the main dwelling's panel, and an equipment grounding conductor is run with the feeder. Per NEC 250.32(B)(1), at the workshop's disconnecting means, the grounded (neutral) conductor:

Must be bonded to the EGC and grounding electrode, same as the main service
Must remain isolated from the equipment grounding conductor
Is not required at all in the feeder
May be bonded only if the structure has metal siding

NEC Reference: NEC 250.32(B)(1)

Question 11: Per NEC 250.4(A)(5), the effective ground-fault current path must be:

Permanent, low-impedance, and capable of safely carrying the maximum likely fault current
Sized only for normal operating current
Optional if the equipment is double-insulated
Routed through the earth as the primary path

NEC Reference: NEC 250.4(A)(5)

Question 12: Per NEC 250.90, bonding is required to ensure:

Electrical continuity and the capacity to safely conduct any likely fault current
A neat and orderly panel appearance
Reduced conductor size requirements
Compliance only for services over 400A

NEC Reference: NEC 250.90

Question 13: Per NEC 250.118, which of the following is recognized as a type of equipment grounding conductor?

Rigid metal conduit, installed and terminated per Code
Any bare copper wire, regardless of size
A telephone grounding block
A metal water pipe run alone with no other bonding

NEC Reference: NEC 250.118

Question 14: Per NEC 250.20(B), a 120/240-volt, single-phase, 3-wire AC system supplying a dwelling must be:

Grounded
Ungrounded
Grounded only if over 400A
Grounded only in wet locations

NEC Reference: NEC 250.20(B)

Question 15: Per NEC Article 100, a "Bonding Jumper" is defined as a reliable conductor that ensures the required electrical conductivity between:

Metal parts required to be electrically connected
Two separate services on the same property
The utility transformer and the meter only
Any two pieces of metal, regardless of function

NEC Reference: NEC Article 100

Question 16: Per NEC Article 100, the "Grounded Conductor" of a wiring system is the conductor that is intentionally:

Grounded (i.e., typically the neutral)
The equipment grounding conductor
Always colored green
Never connected to earth

NEC Reference: NEC Article 100

Question 17: Per NEC 250.64(A), the grounding electrode conductor, where exposed, must be:

Protected from physical damage, and generally spliced only by irreversible compression or exothermic welding
Spliced freely with wire nuts as needed
Installed only in nonmetallic conduit
Routed through a water meter without a bonding jumper

NEC Reference: NEC 250.64(A)

Question 18: Per NEC 250.104(A), interior metal water piping likely to become energized must be bonded to:

The service equipment enclosure, grounded conductor, GEC, or a grounding electrode
A dedicated ground rod separate from the electrode system
Nothing — metal water piping is self-grounding
Only the nearest branch-circuit EGC

NEC Reference: NEC 250.104(A)

Question 19: Per the 2026 NEC 230.85(A), the emergency disconnect for a one-family dwelling must be installed:

In a readily accessible outdoor location
Anywhere inside the dwelling
Only in an attached garage
In the crawl space near the meter

NEC Reference: NEC 2026 — 230.85(A)

Question 20: Per the 2026 NEC 230.85(E), the emergency disconnect for a dwelling must carry which base marking, along with a sub-label identifying its type?

"EMERGENCY DISCONNECT"
"MAIN SHUT-OFF"
"DANGER - HIGH VOLTAGE"
No marking is required beyond a red handle

NEC Reference: NEC 2026 — 230.85(E)

Question 21: Per the 2026 NEC 230.85, when a homeowner operates the emergency disconnect, which conductors are opened?

All ungrounded service conductors
All conductors, including the grounded (neutral) conductor
Only one of the two ungrounded conductors
Only the equipment grounding conductor

NEC Reference: NEC 2026 — 230.85

Question 22: A two-family dwelling has two separate 200-ampere services, each serving one unit. Per the 2026 NEC 230.85(A), how many emergency disconnects are required?

One shared disconnect for both units
Two — one per service
None — two-family dwellings are exempt
Four — two per service

NEC Reference: NEC 2026 — 230.85(A)

Question 23: Per the 2026 NEC, the emergency disconnect requirement in 230.85 applies to which occupancy type?

One-family and two-family dwelling units
All occupancies regardless of size
Commercial occupancies only
Multi-family dwellings of three units or more

NEC Reference: NEC 2026 — 230.85

Question 24: A stand-alone emergency disconnect is installed ahead of the service equipment and is not itself the service disconnect. Per the 2026 NEC 230.85(E)(3), what exact sub-label must accompany the "EMERGENCY DISCONNECT" marking?

"SERVICE DISCONNECT"
"NOT SERVICE EQUIPMENT"
"METER DISCONNECT"
"AUXILIARY DISCONNECT"

NEC Reference: NEC 2026 — 230.85(E)(3)

Question 25: Per the 2026 NEC 230.85(B), the emergency disconnect must be capable of being operated:

By hand, without specialized tools or equipment
Only remotely by the utility
Only with a proprietary key from the manufacturer
Only by a licensed electrician on site

NEC Reference: NEC 2026 — 230.85(B)

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 2

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Key NEC References for This Test

NEC 2026 Journeyman Practice Test 2

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NEC 2026 Journeyman Practice Test 2 — Question List

Question 1: Per NEC 250.24(A), the service grounded (neutral) conductor must be connected to the grounding electrode system at:

Question 2: A dry-type transformer creates a separately derived system inside a commercial building. Per NEC 250.30, this system requires its own:

Question 3: Per NEC 250.50, where multiple grounding electrodes described in 250.52(A) are present at a building — for example, a metal underground water pipe and a concrete-encased electrode — the NEC requires they be:

Question 4: Per NEC 250.52(A)(3), a concrete-encased electrode ("Ufer ground") qualifies as a grounding electrode when it includes at least 20 feet of bare copper conductor not smaller than:

Question 5: A single ground rod electrode is installed and measures 40 ohms of resistance to earth. Per NEC 250.53(A)(2), what must the installer do?

Question 6: Per NEC 250.66(B), where the grounding electrode conductor connects only to a concrete-encased electrode, the GEC is not required to be larger than:

Question 7: Per NEC Table 250.66, for service-entrance conductors of 2/0 AWG copper, the minimum grounding electrode conductor size is:

Question 8: Per NEC Table 250.122, a branch circuit protected by a 100-ampere overcurrent device requires a copper equipment grounding conductor no smaller than:

Question 9: Per NEC 250.28, the main bonding jumper connecting the service equipment enclosure to the grounded (neutral) conductor must be sized:

Question 10: A detached workshop is supplied by a feeder from the main dwelling's panel, and an equipment grounding conductor is run with the feeder. Per NEC 250.32(B)(1), at the workshop's disconnecting means, the grounded (neutral) conductor:

Question 11: Per NEC 250.4(A)(5), the effective ground-fault current path must be:

Question 12: Per NEC 250.90, bonding is required to ensure:

Question 13: Per NEC 250.118, which of the following is recognized as a type of equipment grounding conductor?

Question 14: Per NEC 250.20(B), a 120/240-volt, single-phase, 3-wire AC system supplying a dwelling must be:

Question 15: Per NEC Article 100, a "Bonding Jumper" is defined as a reliable conductor that ensures the required electrical conductivity between:

Question 16: Per NEC Article 100, the "Grounded Conductor" of a wiring system is the conductor that is intentionally:

Question 17: Per NEC 250.64(A), the grounding electrode conductor, where exposed, must be:

Question 18: Per NEC 250.104(A), interior metal water piping likely to become energized must be bonded to:

Question 19: Per the 2026 NEC 230.85(A), the emergency disconnect for a one-family dwelling must be installed:

Question 20: Per the 2026 NEC 230.85(E), the emergency disconnect for a dwelling must carry which base marking, along with a sub-label identifying its type?

Question 21: Per the 2026 NEC 230.85, when a homeowner operates the emergency disconnect, which conductors are opened?

Question 22: A two-family dwelling has two separate 200-ampere services, each serving one unit. Per the 2026 NEC 230.85(A), how many emergency disconnects are required?

Question 23: Per the 2026 NEC, the emergency disconnect requirement in 230.85 applies to which occupancy type?

Question 24: A stand-alone emergency disconnect is installed ahead of the service equipment and is not itself the service disconnect. Per the 2026 NEC 230.85(E)(3), what exact sub-label must accompany the "EMERGENCY DISCONNECT" marking?

Question 25: Per the 2026 NEC 230.85(B), the emergency disconnect must be capable of being operated:

Key NEC References for This Test

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