Hawaii terminology matters: Hawaii does not use “Master Electrician” as the official title of its broad statewide master-level license. The comparable credential is Supervising Electrician (ES). Electrical contracting requires a separate contractor license.
Hawaii Master Electrician Exam Overview
Hawaii's Supervising Electrician license authorizes a qualified electrician to direct and supervise electrical work and to personally perform electrical work.
Candidates must first qualify through the Hawaii Board of Electricians and Plumbers. After Board approval, the exam is scheduled through PSI.
Official license title: Supervising Electrician (ES)
Questions: 70 scored questions
Time: 180 minutes
Passing score: 70%
Format: open book, computer administered
Official License
Hawaii Supervising Electrician (ES)
Common Search Term
Hawaii Master Electrician
Licensing Authority
Hawaii Board of Electricians and Plumbers
Testing Provider
PSI Services
Questions
70 scored questions
Testing Time
180 minutes | 3 hours
Passing Score
70%
Exam Format
Open book
Experience Requirement
4 years as a licensed Journey Worker Electrician
or equivalent experience accepted by the Board
Current PSI NEC
2020 National Electrical Code provided at the test center
1 Exam Prep Study Code
2026 NEC-based current-code study package
Contracting
Separate C-13 Electrical Contractor licensing required
to contract for electrical work
Hawaii Supervising Electrician Exam Topics
Services, Feeders & Branch Circuits: service conductors, equipment, disconnects, feeder sizing, branch circuits, ampacity, load calculations and distribution systems.
Grounding & Bonding: grounding electrodes, grounding electrode conductors, bonding jumpers, separately derived systems, equipment grounding and fault-current paths.
Conductors & Cables: ampacity, insulation, correction and adjustment factors, cable applications, terminations and conductor protection.
Electrical Power & Motors: power relationships, motor conductors, overload protection, controllers, disconnects and advanced electrical calculations.
Special Systems: special occupancies, special equipment, low-voltage systems, communications, lighting, illuminated signs and overcurrent protection.
Hawaii Supervising Electrician Exam Weighting
These bars use the official 70-question PSI Supervising Electrician examination blueprint.
Services, Feeders & Branch Circuits
10 questions
Grounding & Bonding
10 questions
Conductors & Cables
8 questions
General Electrical Knowledge
6 questions
Electrical Power
6 questions
Motors
6 questions
Raceways & Boxes
4 questions
Special Occupancies, Conditions & Equipment
4 questions
Lighting
4 questions
Safety Information
4 questions
Overcurrent Protection
4 questions
Low Voltage & Communication Circuits
2 questions
Illuminated Signs
2 questions
Master-Level Electrical Calculations to Practice
Distribution & Conductors
- Service-load calculations
- Feeder calculations
- Branch-circuit loads
- Conductor ampacity
- Adjustment and correction factors
- Voltage drop
Motors & Equipment
- Motor conductor sizing
- Motor overload protection
- Transformer calculations
- Grounding conductor sizing
- Box fill
- Raceway fill
Open-Book NEC Strategy for the Hawaii Master-Level Exam
Do This
- Practice NEC lookup every study session
- Learn article structure, tables and exceptions
- Identify the electrical topic before searching
- Practice with the 2020 NEC for exam-specific familiarity
- Use the 2026 NEC for current-code education
- Complete calculation drills under time pressure
- Take full 180-minute simulated exams
Avoid This
- Assuming open book means easy
- Depending on personal reference books at the test center
- Searching randomly through the NEC
- Ignoring grounding and bonding
- Skipping motor calculations
- Studying only memorized practice answers
- Confusing the contractor license with the ES electrician license
NEC edition note: the current PSI Hawaii bulletin lists the 2020 NEC as the reference supplied at the Supervising Electrician exam. The 1 Exam Prep package uses the 2026 NEC for current-code education and advanced code-navigation practice.
Hawaii Supervising Electrician Experience Requirement
The standard Hawaii qualification for Supervising Electrician requires four years of experience as a licensed Journey Worker Electrician or equivalent experience accepted by the Hawaii Board of Electricians and Plumbers.
Journey Worker experience matters: the Supervising Electrician credential is an advanced license built on demonstrated electrician experience.
Hawaii does not currently reciprocate electrician licenses with other jurisdictions. Out-of-state candidates must document experience in the manner required by the Hawaii Board.
Hawaii Master-Level Electrician Licensing Roadmap
Move from Journey Worker experience through Board approval, PSI examination and the separate contractor career path.
1
Earn Journey Worker Electrician experience
Build the four years of licensed Journey Worker Electrician experience or accepted equivalent experience required for Supervising Electrician eligibility.
2
Document your experience
Prepare Hawaii's required experience-verification forms and supporting licensing documentation.
3
Apply through the Hawaii Board
Submit the Supervising Electrician application for Board review and examination eligibility.
4
Receive exam approval
Board approval is required before registering for the PSI examination.
5
Prepare for advanced NEC questions
Focus on services, grounding, conductors, power, motors, calculations and fast NEC navigation.
6
Pass the Supervising Electrician exam
Complete 70 scored questions within 180 minutes and earn at least a 70 percent score.
7
Pursue C-13 contractor licensing if needed
Supervising Electrician licensing does not itself authorize an electrical contracting business. Hawaii C-13 contractor licensing is a separate process.
Six-Week Hawaii Master Electrician Exam Prep Plan
Week 1
NEC & Theory
- NEC navigation
- Electrical theory
- Definitions
- Diagnostic practice exam
Week 2
Services & Feeders
- Service equipment
- Feeders
- Branch circuits
- Load calculations
Week 3
Grounding & Conductors
- Grounding electrodes
- Bonding
- Conductors
- Ampacity corrections
Week 4
Power & Motors
- Electrical power
- Motor circuits
- Overloads
- Transformers
Week 5
Special Systems
- Special occupancies
- Lighting
- Low voltage
- Overcurrent protection
Week 6
Timed Simulation
- 70-question practice exams
- 180-minute simulations
- Calculation review
- NEC lookup drills
What the 1 Exam Prep Hawaii Master Electrician Package Includes
Study Materials
- Hawaii Master Electrician Study Guide
- Electrician Calculations Study Guide
- 2026 National Electrical Code
- NEC tabs
- Flash cards
Training & Practice
- Instructor-led NEC course
- Simulated practice examinations
- NEC overview
- Live instructional videos
- Recorded instructional videos
- Advanced electrical calculation practice
Supervising Electrician vs C-13 Electrical Contractor
Supervising Electrician (ES)
- Master-level Hawaii electrician license
- Can direct and supervise electrical work
- Can personally perform electrical work
- Regulated by Board of Electricians and Plumbers
- Does not independently authorize contracting
C-13 Electrical Contractor
- Separate contractor classification
- Regulated by Hawaii Contractors License Board
- Required to contract for electrical work
- Separate contractor qualification process
- Important business-ownership career pathway
Hawaii Master Electrician Contractor Exam Prep FAQ
Master-Level Exam Basics
Hawaii's broad master-level statewide electrician credential
is officially called Supervising Electrician, license code ES.
The current PSI bulletin lists 70 scored questions.
A small number of experimental questions may also appear
and are not scored.
Candidates receive 180 minutes, or three hours.
The minimum passing score is 70 percent.
Yes. The exam is open book, and PSI provides
the authorized NEC reference at the examination center.
NEC & Exam Prep
The current PSI Candidate Information Bulletin lists
the 2020 National Electrical Code as the reference
supplied at the Supervising Electrician examination.
The 2026 NEC provides current-code education and
advanced navigation practice. Candidates should also
prepare with the 2020 NEC because that is the edition
currently listed by PSI for the Hawaii exam.
Services, Feeders and Branch Circuits and Grounding and
Bonding are the largest categories with 10 questions each.
Conductors and Cables accounts for eight questions.
Yes. Motors accounts for six questions in the current
Supervising Electrician blueprint.
Yes. Overcurrent Protection accounts for four questions
in the current PSI exam blueprint.
Yes. Practice service loads, feeders, conductor sizing,
adjustment factors, motors, transformers, voltage drop,
grounding, box fill and raceway fill.
Licensing Requirements
The standard Hawaii Supervising Electrician qualification
requires four years of experience as a licensed Journey Worker
Electrician or equivalent experience accepted by the Board.
The Hawaii Board of Electricians and Plumbers regulates
the Supervising Electrician license.
PSI Services administers Hawaii electrician examinations
after the Board approves the applicant.
Current PSI information states that eligibility is valid
for two years after Board approval.
Contractor Career Path
The Supervising Electrician license alone does not authorize
the holder to contract for electrical work. Hawaii requires
the appropriate separate contractor license.
C-13 is Hawaii's Electrical Contractor classification.
It is regulated separately by the Hawaii Contractors License Board.
No. The Supervising Electrician exam is part of electrician
licensing under the Board of Electricians and Plumbers.
C-13 contractor licensing is a separate process.
Start with Services, Feeders and Branch Circuits,
Grounding and Bonding, and Conductors and Cables.
Then review General Electrical Knowledge, Electrical Power,
Motors, Raceways, special systems, lighting,
overcurrent protection and safety.
Hawaii Master Electrician Exam Prep Resources
Prepare for the Hawaii Master-Level Electrician Exam
Build advanced NEC navigation speed, calculation accuracy, grounding knowledge, service and feeder expertise, motor skills and supervising-level electrical knowledge for the Hawaii Supervising Electrician licensing exam.
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