Free Practice Questions for ID Electrician

Exam-style questions and explanations by OpenExamPrep.

✓ No registration✓ No credit card

338+ Questions

100% Free

Loading practice questions...

Same family resources

Explore More Electrician License

Continue into nearby exams from the same family. Each card keeps practice questions, study guides, flashcards, videos, and articles in one place.

More From This Family

Videos and articles for deeper review.

VideoBest NEC Code Tab Sets for the Electrician Exam in 2026: Navigate Your Code Book Fast VideoFree Journeyman Electrician Practice Test by State 2026: 3,800+ NEC Questions ArticleKlein MM400 Review 2026: Verified Specs, Safety Limits, and MM420 Comparison15 min read ArticleBest Non-Contact Voltage Testers for Electricians in 2026: Fluke vs Klein Compared14 min read ArticleBest NEC Code Tab Sets for the Electrician Exam in 2026: Navigate Your Code Book Fast12 min read ArticleBest Fluke 117 Multimeter for Electricians: Complete 2026 Buying Guide14 min read

Exam Review

Key Facts: ID Electrician Exam

70%

Passing Score

DOPL Electrical Exam Information Bulletin

100

Exam Questions

DOPL Electrical Exam Information Bulletin

$75

Exam Fee

Idaho DOPL Electrical Program

2023 NEC

Code Edition

IDAPA 24.39.10.600

The Idaho Journeyman Electrician examination is administered by PSI Services on behalf of the Idaho Electrical Board / DOPL. The exam contains 100 questions and requires a 70% score (70 correct) to pass. The test is open-book on the 2023 NEC as amended by IDAPA 24.39.10. Candidates must document either 8,000 hours of registered apprentice work plus a four-year approved sequence of instruction, or 16,000 hours of electrical experience, before licensure. Verify the exact allotted testing time in the current PSI candidate bulletin for the exam you schedule.

Sample ID Electrician Practice Questions

Try these sample questions to review concepts for the ID Electrician exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 338+ question experience with AI tutoring.

1According to the NEC as adopted by Idaho, what is the definition of a 'branch circuit'?

A.The circuit conductors between the final overcurrent device and the outlets

B.Any circuit that supplies power to a building

C.The main service conductors from the utility transformer

D.A circuit that connects two panelboards together

Explanation: Per NEC Article 100 (as adopted under the NEC 2023), a branch circuit is defined as the circuit conductors between the final overcurrent device protecting the circuit and the outlet(s). This definition is fundamental to understanding circuit design and protection requirements.

2What does the NEC define as 'readily accessible'?

A.Capable of being reached quickly without climbing or removing obstacles

B.Within 6 feet of the floor

C.Visible from the main entrance of a room

D.Accessible only with the use of special tools

Explanation: NEC Article 100 defines 'readily accessible' as capable of being reached quickly for operation, renewal, or inspections without requiring those to whom ready access is requisite to take actions such as climbing or removing obstacles. This term is used throughout the NEC for disconnecting means and overcurrent devices.

3Per the NEC, what is the minimum cover requirement for direct-buried UF cable under a one-family dwelling driveway used only for dwelling-related purposes?

A.12 inches

B.18 inches

C.24 inches

D.6 inches

Explanation: NEC Table 300.5, Column 1 (direct-buried cables and conductors), row 'One- and two-family dwelling driveways and outdoor parking areas, and used only for dwelling-related purposes' requires a minimum cover of 18 inches. The 24-inch requirement applies to public streets, highways, alleys, and non-dwelling driveways subject to vehicular traffic.

4According to the NEC, what is the maximum voltage permitted for lighting circuits in a dwelling unit?

A.120 volts

B.150 volts

C.277 volts

D.240 volts

Explanation: NEC Section 210.6(A) limits the voltage on lighting branch circuits in dwelling units to 120 volts between conductors. While 277-volt lighting is permitted in commercial and industrial occupancies, dwelling units are restricted to 120-volt lighting circuits for safety.

5In Idaho, which edition of the NEC is currently adopted for the journeyman electrician exam?

A.NEC 2017

B.NEC 2023

C.NEC 2014

D.NEC 2026

Explanation: Idaho currently uses the NEC 2023 for its journeyman electrician licensing exam. It is critical to study the correct edition, as code requirements can change significantly between editions. Always verify the current adopted edition with the Idaho Division of Building Safety.

6According to the NEC, what is the minimum size copper conductor permitted for use as a branch circuit?

A.18 AWG

B.16 AWG

C.14 AWG

D.12 AWG

Explanation: NEC Section 210.3 specifies that branch circuit conductors shall have an ampacity not less than the maximum load to be served, and NEC Table 310.16 shows 14 AWG copper as the minimum size for branch circuits rated at 15 amperes. While smaller conductors exist, 14 AWG is the minimum for standard branch circuits.

7What does the NEC term 'approved' mean regarding electrical equipment?

A.Listed by a nationally recognized testing laboratory

B.Acceptable to the authority having jurisdiction (AHJ)

C.Manufactured by an approved company

D.Meeting the minimum requirements of the NEC

Explanation: NEC Article 100 defines 'approved' as acceptable to the authority having jurisdiction (AHJ). The AHJ has the final authority on whether equipment, materials, and installations meet the requirements. This is distinct from 'listed' or 'labeled,' which involve third-party testing.

8Per NEC Article 100, what distinguishes a 'separately derived system' from other electrical systems?

A.It operates at a different voltage than the main service

B.It has no direct connection to supply conductors of another system

C.It is powered by a generator or solar panels only

D.It requires a separate grounding electrode

Explanation: NEC Article 100 defines a separately derived system as a premises wiring system whose power is derived from a source of electric energy or equipment other than a service, and that has no direct connection(s) to circuit conductors of any other system other than those established by grounding and bonding connections. This definition is crucial for proper grounding per Article 250.

9According to NEC Section 110.26, what is the minimum headroom requirement for working spaces about electrical equipment rated 600 volts or less?

A.6 feet

B.6 feet 6 inches

C.7 feet

D.6 feet 3 inches

Explanation: NEC Section 110.26(A)(3) requires a minimum headroom of 6 feet 6 inches (2.0 m) for working spaces about electrical equipment rated 600 volts, nominal, or less. This clearance ensures safe access for maintenance and operation of electrical equipment.

10Per the NEC, what is the purpose of equipment grounding conductors?

A.To carry normal operating current

B.To provide an effective ground-fault current path back to the source

C.To reduce voltage drop on long circuits

D.To serve as a neutral conductor for 240-volt circuits

Explanation: NEC Section 250.4(A)(5) states that equipment grounding conductors provide an effective ground-fault current path from the point of a ground fault on a wiring system back to the electrical supply source. This path facilitates the operation of the overcurrent protective device to clear the fault.

About the ID Electrician Exam

Idaho state journeyman electrician licensing exam based on the 2023 National Electrical Code (NEC) as amended by IDAPA 24.39.10. Covers NEC code compliance, branch circuits, grounding and bonding, wiring methods, motors and transformers, services and feeders, special occupancies, electrical calculations, and Idaho state amendments. Idaho grants journeyman reciprocity to licensees from Colorado, Maine, Montana, Nebraska, New Hampshire, New Mexico, North Dakota, Oklahoma, Oregon, South Dakota, Texas and Wyoming. The exam is administered by PSI Services.

Exam sponsor: Idaho Electrical Board / Idaho Division of Occupational and Professional Licenses (DOPL). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Questions

100 questions

Time Limit

270 minutes (4 hours 30 minutes) — confirm in the current PSI candidate bulletin

Passing Score

70%

Exam / Certification Fees

$75

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Official sources

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

Introduction (NEC Article 90 & Idaho Statutes/Rules)

NEC Article 90 purpose, scope and code arrangement, plus Idaho Code Title 54 Chapter 10 and IDAPA 24.39.10 licensing, permit and inspection rules.

NEC Chapter 1 — General (Articles 100 & 110)

Article 100 definitions and Article 110 general requirements including terminations (110.14) and working space (110.26).

20%

NEC Chapter 2 — Wiring and Protection (Articles 200-285)

Branch circuits (210), load calculations (220), feeders (215), services (230), overcurrent protection (240) and grounding and bonding (250).

20%

NEC Chapter 3 — Wiring Methods and Materials (Articles 300-399)

General wiring rules (300), ampacity and derating (310), boxes (314), cable assemblies (320, 330, 334) and raceways (342, 344, 348, 352, 358).

15%

NEC Chapter 4 — Equipment for General Use (Articles 400-495)

Switches (404), receptacles (406), panelboards (408), luminaires (410), appliances (422), space heating (424), motors (430), generators (445) and transformers (450).

13%

NEC Chapter 5 — Special Occupancies (Articles 500-590)

Hazardous locations (500-506), commercial garages (511), fuel dispensing (514), health care (517), agricultural buildings (547), marinas (555) and RV parks (551).

NEC Chapter 6 — Special Equipment (Articles 600-695)

Signs (600), EV power transfer systems (625), pools and spas (680), solar PV (690), energy storage (706) and fire pumps (695).

NEC Chapter 7 — Special Conditions (Articles 700-770)

Emergency systems (700), legally required standby (701), optional standby (702), interconnected sources (705), Class 1/2/3 circuits (725) and fire alarm (760).

NEC Chapter 8 — Communications Systems (Articles 800-840)

Communications circuits, coaxial cable and broadband systems, independent of Chapters 1 through 7 unless specifically referenced.

NEC Chapter 9 — Tables

Conduit fill percentages (Table 1), raceway areas (Table 4), conductor areas (Table 5) and conductor properties (Table 8).

Calculations

Stand-alone calculation items covering Ohm's law, voltage drop, conductor sizing and load calculations.

Preparing for the ID Electrician Exam

What You Need to Know

Passing score: 70%
Exam length: 100 questions
Time limit: 270 minutes (4 hours 30 minutes) — confirm in the current PSI candidate bulletin
Exam / certification fees: $75 Official sources

Using Our Practice Resources

Work through all 338 available questions
Review every answer and explanation
Track weak areas and revisit them
Use our AI tutor for tough concepts

ID Electrician: Suggested Study Strategy

1Study the 2023 NEC thoroughly — the exam is open book, so learn to navigate the index and table of contents fast; tabs, highlighting and permanent notes are allowed but loose paper is not

2Weight your study time to the published DOPL breakdown: NEC Chapters 2 and 3 are 20 items each, Chapter 4 is 15 and Chapter 5 is 13

3Master NEC Article 250 (Grounding and Bonding) with Table 250.66 and Table 250.122, which sit inside the 20-item Chapter 2 block

4Practice dwelling unit load calculations using NEC Article 220 standard and optional methods until you can complete them in under 10 minutes

5Learn the IDAPA 24.39.10.600 amendments cold — Idaho deletes many 2023 NEC GFCI locations, limits AFCI in one- and two-family dwellings to bedrooms, and makes dwelling surge protection and emergency disconnects permissive rather than mandatory

Frequently Asked Questions

How hard is the Idaho journeyman electrician exam?

The Idaho journeyman electrician exam is a demanding open-book code exam: 100 questions drawn from the 2023 NEC as amended by IDAPA 24.39.10, requiring 70% to pass. The Idaho Electrical Board does not publish a pass rate. Fast NEC navigation and confident load, ampacity and motor calculations matter more than memorization.

What NEC edition does Idaho use for the electrician exam?

Idaho has adopted the 2023 National Electrical Code with state amendments in IDAPA 24.39.10.600, and the 2023 edition became the tested code edition on August 1, 2025. You bring your own copy of the 2023 NEC; handbooks, commentaries and illustrated editions are not allowed.

How much does the Idaho electrician exam cost?

The Idaho electrical exam fee is $75, paid to PSI when you schedule. Licensure adds $70 to DOPL ($15 application fee plus a $55 journeyman license fee for a three-year term). Budget another $100-$170 for the 2023 NEC code book and tabs.

What are the experience requirements for the Idaho journeyman electrician license?

Under IDAPA 24.39.10.100.02, candidates qualify either through Pathway A (8,000 hours of registered apprentice electrical installation work plus satisfactory completion of a four-year sequence of instruction approved by the Idaho Division of Career-Technical Education) or Pathway B (16,000 hours of electrical experience). No more than 2,000 hours of limited electrical installer or trainee work may be counted.

Free Practice Questions for ID Electrician

Idaho Journeyman Electrician

Explore More Electrician License

Arkansas Journeyman Electrician

Connecticut Journeyman Electrician

Oklahoma Journeyman Electrician

Alaska Journeyman Electrician

Journeyman Electrician

Master Electrician