Current Idaho Master exam: 100 questions, 270 minutes, 75 correct required, open book. The Master Electrician exam is separate from Idaho's Electrical Contractor Business & Law examination.
Idaho Master Electrician Exam Overview
The Idaho Master Electrician exam is an advanced electrical trade examination administered through PSI for the Idaho Division of Occupational and Professional Licenses.
Preparation should focus heavily on NEC navigation and master-level code application. Wiring and Protection, Wiring Methods and Materials, and Equipment for General Use alone account for 65 of the 100 questions.
Questions: 100
Time: 270 minutes / 4.5 hours
Passing requirement: 75 correct
Format: open book
Testing provider: PSI
License
Idaho Master Electrician
Licensing Authority
Idaho Division of Occupational and Professional Licenses
Testing Provider
PSI
Master Exam
100 questions | 270 minutes | 75 correct
Exam Format
Open book
Master Experience
At least four years holding an Electrical Journeyman license
Idaho Adopted NEC
2023 NEC with Idaho amendments
PSI Master NEC References
2020 NEC or 2023 NEC
Additional Reference
2023 Ugly's Electrical References
Course Study Code
1 Exam Prep 2026 NEC-based study materials
Idaho Master Electrician Exam Weighting
These bars follow the current PSI 100-question Idaho Master Electrician blueprint.
Wiring & Protection
25 questions
Wiring Methods & Materials
20 questions
Equipment for General Use
20 questions
Special Occupancies
11 questions
General Electrical Knowledge
10 questions
Special Equipment
6 questions
Special Conditions
5 questions
Communication Systems
3 questions
Master Electrician Calculations to Practice
Services & Conductors
- Service-load calculations
- Feeder calculations
- Branch-circuit calculations
- Conductor ampacity
- Adjustment and correction factors
- Voltage drop
Equipment & Protection
- Motor calculations
- Transformer calculations
- Grounding and bonding
- Overcurrent protection
- Box fill
- Raceway fill
Code-edition note: Idaho currently adopts the 2023 NEC with Idaho amendments. PSI currently permits the 2020 or 2023 NEC on the Master Electrician exam. Current 1 Exam Prep study products use the 2026 NEC for current-code education.
Open-Book Master Electrician Exam Strategy
Do This
- Practice with a PSI-approved NEC edition
- Use permanent NEC indexing
- Highlight major tables before test day
- Learn article structure and definitions
- Practice fast code lookups
- Complete advanced calculations under time pressure
- Take full 270-minute practice exams
Avoid This
- Using temporary Post-it-style tabs
- Bringing loose reference papers
- Assuming open book means easy
- Ignoring Special Occupancies
- Skipping motor and transformer calculations
- Studying only memorized questions
- Using outdated four-hour exam timing
Idaho Journeyman to Master Electrician Path
The principal Idaho Master Electrician licensing path requires the applicant to have held an active Electrical Journeyman license for at least four years.
Career progression: Apprentice → Journeyman Electrician → Master Electrician
The Master Electrician credential is an advanced individual electrical license and is separate from Idaho's Electrical Contractor license.
Idaho Electrical Contractor Exam
The Idaho Electrical Contractor exam is separate from the Master Electrician trade examination.
Instead of testing NEC trade knowledge, the contractor exam focuses on Idaho Contractor Business & Law, including contractor responsibilities, employment, insurance, contracts and business administration.
Questions: 100
Time: 240 minutes / 4 hours
Passing requirement: 70 correct
Format: open book
Primary reference: Idaho Contractor's Business and Law Reference Manual
Idaho Master Electrician Contractor Licensing Roadmap
Move from Journeyman experience through Master testing and into the separate Electrical Contractor licensing path.
1
Build Journeyman experience
Hold the Idaho Electrical Journeyman license for the experience period required for Master eligibility.
2
Prepare approved NEC references
Practice using the 2020 or 2023 NEC permitted by PSI.
3
Study the Master blueprint
Prioritize Wiring and Protection, Wiring Methods, Equipment and Special Occupancies.
4
Complete advanced calculations
Practice services, feeders, motors, transformers, grounding, voltage drop, box fill and raceway fill.
5
Pass the Master Electrician exam
Complete 100 questions in 270 minutes and earn at least 75 correct answers.
6
Prepare contractor Business & Law separately
Electrical Contractor candidates should study the Idaho Contractor's Business and Law Reference Manual.
7
Complete contractor licensing
Finish the applicable Idaho DOPL contractor, insurance and business requirements.
Six-Week Idaho Master Electrician Exam Prep Plan
Week 1
NEC Navigation
- NEC organization
- Definitions
- Permanent tabs
- Diagnostic exam
Week 2
Wiring & Protection
- Services
- Feeders
- Branch circuits
- Grounding and bonding
Week 3
Wiring Methods
- Raceways
- Cables
- Boxes
- Conductor sizing
Week 4
Equipment
- Motors
- Transformers
- Appliances
- Equipment rules
Week 5
Special Systems
- Special occupancies
- Special equipment
- Special conditions
- Communications
Week 6
Timed Simulation
- 100-question practice tests
- 270-minute simulations
- Calculation review
- Final NEC lookup drills
Idaho Master Electrician Exam Prep Resources
Master Study Materials
- Idaho Master Electrician Study Guide
- National Electrical Code study
- NEC tabs
- Electrical calculations review
- Advanced NEC navigation practice
Practice & Training
- 100-question practice exams
- Timed exam simulation
- Code-lookup drills
- Master-level calculations
- Recorded and instructor-led training options
Idaho Master Electrician Contractor Exam Prep FAQ
Idaho Master Electrician Exam
The current Idaho Master Electrician PSI exam contains
100 questions.
Candidates receive 270 minutes, or four and a half hours.
Candidates need 75 correct answers.
Yes. It is an open-book PSI examination using approved references.
NEC References
The current PSI bulletin permits either the
2020 NEC or 2023 NEC.
The current PSI Master reference list does not list
the NEC Handbook as an approved Master exam reference.
Idaho currently adopts the 2023 NEC with Idaho amendments.
Yes. PSI allows permanent indexing, highlighting
and underlining. Temporary Post-it-style tabs are prohibited.
Master Exam Topics
Wiring and Protection is the largest category
with 25 questions.
Wiring Methods and Materials accounts for 20 questions.
Equipment for General Use accounts for 20 questions.
Yes. Practice service loads, feeders, conductor sizing,
voltage drop, motors, transformers, grounding,
box fill and raceway fill.
Master Licensing
The principal Idaho pathway requires the applicant to have
held an Electrical Journeyman license for at least four years.
Idaho provides reciprocity pathways for qualifying
Master licensees who meet applicable license,
examination and experience-verification requirements.
Electrical Contractor Exam
No. The Master Electrician exam is an advanced NEC trade exam.
The Electrical Contractor exam is a separate Idaho
Business and Law examination.
The Idaho Electrical Contractor examination contains
100 questions.
Candidates receive 240 minutes, or four hours.
The current passing requirement is 70 correct answers.
Begin with Wiring and Protection, Wiring Methods and Materials
and Equipment for General Use. Then study Special Occupancies,
General Electrical Knowledge, Special Equipment,
Special Conditions and Communication Systems.
Prepare for the Idaho Master Electrician Exam
Build NEC navigation speed, master-level calculation accuracy, wiring and protection knowledge, equipment expertise, special-occupancy knowledge and contractor Business & Law understanding for Idaho electrical licensing.
- Al elegir una selección, se actualiza la página completa.
- Se abre en una nueva ventana.