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Exam Review

Key Facts: ID Electrician Exam

75%

Minimum Passing Score

PSI Idaho Candidate Bulletin (effective 12.10.2025)

100

Exam Questions

PSI Idaho Candidate Bulletin (effective 12.10.2025)

$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. It has 100 questions, a 270-minute limit and a minimum passing score of 75. The test is open book: candidates may bring the 2020 or 2023 NEC (or the NFPA NEC Handbook of either edition) and Ugly's Electrical References. 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.

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 431+ 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 National Electrical Code (2020 or 2023 edition), Ugly's Electrical References, general trade knowledge and industry practices. Its seven topic areas are General Electrical Knowledge, Wiring and Protection, Wiring Methods and Materials, Equipment for General Use, Special Occupancies, Special Equipment and Special Conditions. 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)

Passing Score

75%

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.

13%

General Electrical Knowledge

13 of 100 items on the PSI Idaho journeyman outline: electrical theory, general trade knowledge and code use.

25%

Wiring and Protection

25 of 100 items, named for NEC Chapter 2: branch circuits, feeders, services, overcurrent protection, and grounding and bonding.

19%

Wiring Methods and Materials

19 of 100 items, named for NEC Chapter 3: wiring methods, conductors, raceways, cables and boxes.

19%

Equipment for General Use

19 of 100 items, named for NEC Chapter 4: cords, switches, receptacles, panelboards, luminaires, appliances, motors and transformers.

12%

Special Occupancies

12 of 100 items, named for NEC Chapter 5: hazardous (classified) locations and other special occupancies.

Special Equipment

6 of 100 items, named for NEC Chapter 6: signs, pools, information technology equipment, solar and other special equipment.

Special Conditions

6 of 100 items, named for NEC Chapter 7: emergency and standby systems and Class 1, 2 and 3 circuits.

Preparing for the ID Electrician Exam

What You Need to Know

Passing score: 75%
Exam length: 100 questions
Time limit: 270 minutes (4 hours 30 minutes)
Exam / certification fees: $75 Official sources

Using Our Practice Resources

Work through all 431 available questions
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ID Electrician: Suggested Study Strategy

1Study the NEC edition you will bring (2020 or 2023) thoroughly — the exam is open book, so learn to navigate the index and table of contents fast; highlighting, underlining and permanent tabs are allowed but loose paper and Post-its are not

2Weight your study time to the PSI outline: Wiring and Protection is 25 items, Wiring Methods and Materials and Equipment for General Use are 19 each, General Electrical Knowledge is 13 and Special Occupancies is 12

3Master NEC Article 250 (Grounding and Bonding) with Table 250.66 and Table 250.122, which sit inside the 25-item Wiring and Protection 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 in 270 minutes, with a minimum passing score of 75. Code questions use the 2020 or 2023 NEC. 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. The current PSI candidate bulletin (effective December 10, 2025) lets journeyman candidates bring NFPA 70 in the 2020 or 2023 edition, or the NFPA 70 NEC Handbook of either edition, and says code-based questions use only those editions.

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.

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