Supervising Electrician (ES) • PSI • 70 Scored Questions • 180 Minutes • 70% Passing • Open Book
Thinking about moving beyond journeyman electrical work and into higher-level electrical supervision? This Hawaii Master Electrician Contractor Exam Prep guide covers the licensing classification that Hawaii actually uses, official PSI examinations, NEC reference books, electrical calculations, contractor licensing differences, and study packages from Contractor Exam Preps.
The first thing to understand is the official license title.
Hawaii does not use Master Electrician as the formal statewide license name.
The related advanced electrical license is Supervising Electrician, abbreviated ES.
This license is regulated by the Hawaii Board of Electricians and Plumbers through the Department of Commerce and Consumer Affairs, Professional and Vocational Licensing Division.
The Supervising Electrician classification covers professionals who may perform electrical work and direct or supervise electrical work within the applicable state rules.
The title Master Electrician is commonly used in educational products and by electricians searching for advanced-level exam preparation.
That is why Contractor Exam Preps offers Hawaii Master Electrician study guides even though Hawaii's licensing application identifies the ES classification.
Before buying study materials, applicants should verify that the exam they need is Hawaii Supervising Electrician.
The official qualifying experience requirement generally involves being registered as a Journey Worker Electrician for at least four years, or having equivalent qualifying experience accepted by the Board.
This is different from the entry-level Journey Worker Electrician pathway.
The state generally requires five years and 10,000 hours of electrical wiring experience to become a Journey Worker Electrician.
The four-year Supervising Electrician requirement applies to advancement from journey worker status or an accepted equivalent.
After the Board approves the applicant, the candidate may schedule the Supervising Electrician licensing examination through PSI.
The official exam contains 70 scored questions.
Candidates have 180 minutes, or three hours.
The minimum passing score is 70%.
That requires at least 49 correct scored answers.
PSI may include up to ten additional unscored experimental questions, which are used for examination development.
The test is open book, but candidates do not bring their own NEC codebooks into the testing room.
Instead, PSI supplies the approved reference.
The current Hawaii PSI Supervising Electrician bulletin lists the 2020 National Electrical Code.
This detail matters because the latest Hawaii Master Electrician study packages sold by Contractor Exam Preps are based on the 2026 NEC.
The newer books are useful for studying electrical principles, reviewing current-code concepts, practicing calculations, and learning how the NEC is organized.
However, their 2026 edition must not be confused with the 2020 edition used in the current PSI exam.
A candidate preparing for Hawaii's licensing test should study the 2020 NEC provisions that apply to the examination.
The Supervising Electrician exam goes beyond basic wiring terminology.
It covers general electrical knowledge, services, feeders, branch circuits, grounding, bonding, conductors, cables, raceways, boxes, special occupancies, electrical power, motors, low-voltage systems, lighting, illuminated signs, safety, and overcurrent protection.
The largest examination categories are Services, Feeders and Branch Circuits and Grounding and Bonding.
Each contains ten scored questions.
Conductors and Cables follows with eight questions.
Electrical Power and Motors contain six questions each.
These topics are especially important for electricians taking greater responsibility for the installation and supervision of electrical systems.
A supervising electrician may need to understand the relationship between a building's service equipment, connected loads, feeder conductors, protective devices, grounding system, and downstream equipment.
That requires the ability to interpret NEC rules and evaluate installation conditions accurately.
Electrical calculations are a major study priority.
Applicants should practice service and feeder load calculations, conductor ampacity, grounding conductor sizing, motor circuits, transformer basics, box fill, raceway fill, voltage drop, and overcurrent protection.
They should also understand common electrical safety concerns.
Fault currents, grounding and bonding errors, improper overcurrent protection, damaged conductors, and unsafe equipment installations can create serious problems.
Being responsible for supervising electrical work means recognizing those risks rather than hoping someone else will catch them later.
For comprehensive study, Contractor Exam Preps offers the 2026 Hawaii Master Electrician Super Combo.
This package combines a Hawaii Master Electrician Study Guide, Electrician Calculations Study Guide, a 2026 National Electrical Code paperback with tabs, and Master Electrician Flash Cards.
The Hawaii Master Electrician Study Guide and NEC Combo is a smaller option for students who want an advanced electrical study guide paired with a tabbed codebook.
Contractor Exam Preps also sells the 2026 Master Electrician and Calculations Book Combo, a general master-level package useful for additional electrical mathematics.
Remember that purchasing an advanced electrical study package does not automatically qualify someone for licensing.
Hawaii reviews the applicant's experience, license history, and other applicable requirements.
It is also important to distinguish the ES trade license from independent contracting authority.
A Supervising Electrician license permits qualified electrical work and supervision, but it does not automatically authorize independent electrical contracting.
Hawaii requires a separate C-13 Electrical Contractor license for regulated electrical contracting activity.
This guide includes an official exam snapshot, licensing roadmap, thirteen-category exam breakdown, electrical diagram, reference-book guide, six-week study plan, Contractor Exam Preps products, custom Hawaii credential illustration, interactive FAQs, and a related 1ExamPrep Master Electrician video.
Important Hawaii Master Electrician 2026 Update: Hawaii's corresponding state credential is Supervising Electrician (ES), not an officially titled Master Electrician license. The Supervising Electrician PSI examination has 70 scored questions, 180 minutes, and a 70% passing requirement. It is open book using the 2020 NEC supplied by PSI. Candidates may not bring their own tabbed or highlighted reference books. The experience requirement generally involves four years registered as a licensed Journey Worker Electrician or accepted equivalent experience. Contractor Exam Preps' current Hawaii Master Electrician study products use the 2026 NEC, so candidates should distinguish those study materials from the actual test reference. Independent contracting requires separate C-13 Electrical Contractor licensing. The next regular Hawaii electrician renewal deadline is June 30, 2029.
In Hawaii, the advanced electrician credential most commonly associated with the term Master Electrician is officially called Supervising Electrician.
The license abbreviation is ES.
The Hawaii Board of Electricians and Plumbers issues this individual professional credential.
A Supervising Electrician is qualified to perform electrical work and direct or supervise electrical work within the applicable laws and license scope.
This requires experience beyond ordinary entry-level electrical training.
Electrical supervision involves understanding how power systems function, how work should be installed, and how code requirements affect the finished installation.
Consider a commercial electrical distribution project.
It may involve service equipment, a transformer, panelboards, feeders, branch circuits, motors, lighting, disconnects, and grounding and bonding systems.
Each part must be selected and installed for the correct application.
The conductors must be appropriate for the loads and installation conditions.
Protective equipment must be correctly selected.
Grounding and bonding must meet applicable requirements.
Service and feeder calculations must account for the connected and calculated loads.
Boxes and raceways must be properly sized.
Special occupancies may introduce additional electrical rules.
A supervising electrician must understand these relationships and the practical consequences of mistakes.
For example, a conductor may appear large enough at first glance.
However, ampacity adjustment and correction factors may change the actual permitted capacity.
A motor circuit may require different calculations for its conductor sizing and overload protection.
A grounding question may depend on knowing whether the NEC refers to a grounding electrode conductor or an equipment grounding conductor.
Those are not interchangeable terms.
This higher level of understanding is part of the reason the Supervising Electrician exam emphasizes services, feeders, grounding, bonding, conductors, electrical power, motors, and overcurrent protection.
Hawaii also has a separate Supervising Industrial Electrician classification, designated ESI.
That license has a different experience requirement and examination blueprint.
Students should not accidentally prepare for ESI when they actually intend to pursue the ES classification.
Another important distinction concerns business licensing.
Neither an ES license nor a Journeyman Electrician license automatically substitutes for a Hawaii electrical contractor license.
Operating an electrical contracting business involves separate requirements under Hawaii's contractor licensing laws.
For general electrical contracting, candidates should review the C-13 Electrical Contractor classification.
Choosing the correct license is the first step in preparing effectively.
Common study name: Hawaii Master Electrician.
Official license: Supervising Electrician.
License code: ES.
Related industrial license: Supervising Industrial Electrician, ESI.
Separate business license: C-13 Electrical Contractor.
Visit the Hawaii Board of Electricians and Plumbers for official licensing requirements.
Becoming a Hawaii Supervising Electrician requires qualifying work experience, proper documentation, Board approval, and passing the correct PSI examination.
| Step | Requirement | What to Prepare |
|---|---|---|
| Choose Classification | Supervising Electrician, ES | Confirm that you need ES rather than ESI or a C-13 contractor license. |
| Verify Journey Worker Status | Licensed EJ Experience | Document your registration and employment history as a Journey Worker Electrician. |
| Meet Experience Standard | Four Years | Show four years registered as a journey worker or accepted equivalent experience. |
| Review Equivalent Experience | Board Acceptance | Applicants relying on alternatives must provide documentation supporting the equivalent experience. |
| Identify License History | Current or Previous Electrical Licenses | Collect applicable Hawaiian and out-of-state licensing information. |
| Prepare Experience Verification | Official Forms | Use the electrical work verification documentation required by the Board. |
| Review Academic Requirements | Classification-Specific Rules | Do not confuse initial EJ academic requirements with ES advancement requirements. |
| Submit Application | Hawaii DCCA | Submit the proper electrician application and applicable fees. |
| Wait for Board Approval | Required | Receive the eligibility letter before registering with PSI. |
| Exam Eligibility | Two Years | Schedule within the eligibility period stated by PSI. |
| Select PSI Examination | Supervising Electrician | Confirm you selected the ES examination, not the EJ exam. |
| Review Exam Time | 180 Minutes | Practice solving 70 scored questions in three hours. |
| Review Passing Score | 70% | Answer at least 49 of the 70 scored questions correctly. |
| Review Exam Reference | 2020 NEC | Practice with the NEC edition supplied by PSI. |
| Understand Open-Book Rules | PSI-Supplied Reference | Do not bring personal tabbed NEC books. |
| Complete Examination | PSI Passing Score | Meet the official passing standard. |
| Complete License Issuance | Board Instructions | Finish any final requirements following examination passage. |
| Maintain License | Three-Year Renewal | Review active-status and continuing competency requirements. |
| Next Regular Renewal | June 30, 2029 | Follow current DCCA renewal guidance. |
| Independent Contracting | Separate C-13 License | Pursue the appropriate contractor licensing pathway if operating independently. |
The following information is specific to the official Hawaii Supervising Electrician examination. This is the appropriate master-level trade exam for the ES classification.
| Exam Detail | Category | Published Information |
|---|---|---|
| State | Hawaii | Hawaii |
| Common Name | Study | Hawaii Master Electrician |
| Official License | Board | Supervising Electrician |
| License Code | Board | ES |
| Regulator | Board | Hawaii Board of Electricians and Plumbers |
| Examination Provider | PSI | PSI Services LLC |
| Examination Name | PSI | Supervising Electrician |
| Scored Questions | PSI | 70 |
| Possible Experimental Questions | PSI | Up to 10 Unscored |
| Exam Time | PSI | 180 Minutes |
| Passing Score | PSI | 70% |
| Minimum Scored Correct | PSI | 49 of 70 |
| Reference Format | PSI | Open Book |
| Provided NEC | PSI | 2020 National Electrical Code |
| Personal Codebook | PSI | Not Allowed |
| General Electrical Knowledge | Trade | 6 Questions |
| Services, Feeders and Branch Circuits | Trade | 10 Questions |
| Grounding and Bonding | Trade | 10 Questions |
| Conductors and Cables | Trade | 8 Questions |
| Raceways and Boxes | Trade | 4 Questions |
| Special Occupancies, Conditions and Equipment | Trade | 4 Questions |
| Electrical Power | Trade | 6 Questions |
| Motors | Trade | 6 Questions |
| Low Voltage and Communication Circuits | Trade | 2 Questions |
| Lighting | Trade | 4 Questions |
| Illuminated Signs | Trade | 2 Questions |
| Safety Information | Trade | 4 Questions |
| Overcurrent Protection | Trade | 4 Questions |
| Journey Worker Experience | License | Four Registered Years or Accepted Equivalent |
| Exam Eligibility | License | Two Years After Approval |
| 2026 Study Package NEC | Books | 2026 Edition |
| State Electrical Code Basis | Construction | 2020 NEC with Applicable Amendments |
| Next Regular Renewal | DCCA | June 30, 2029 |
| Independent Contractor Class | Business | C-13 Electrical Contractor |
Scored test: 70 questions, 180 minutes, 70% passing.
Official question categories: 13.
PSI code reference: 2020 NEC supplied at the testing center.
Store study editions: 2026 NEC.
Licensing: Four years as a registered Journey Worker or equivalent qualifying experience.
The official PSI Supervising Electrician examination blueprint contains thirteen categories, totaling 70 scored questions.
Review electrical definitions, theory, circuit principles, power, voltage, current, resistance, and general installation practices. Practice interpreting electrical terminology and determining the relationships among common electrical quantities.
Study service conductors, disconnecting means, service equipment, feeders, branch circuits, distribution, overcurrent devices, and load calculations. Supervising electricians should understand how power flows from the service through downstream electrical systems.
Review grounding electrode systems, grounding electrode conductors, equipment grounding conductors, bonding jumpers, and separately derived systems. Understanding fault-current paths and the role of electrical continuity is essential.
Practice conductor ampacity, insulation, temperature limitations, termination ratings, correction factors, adjustment factors, and cable installation requirements. Learn to read NEC conductor tables carefully.
Study conduit methods, raceway sizing, conduit fill, box fill, fittings, support, and installation limitations.
Review the additional rules that apply to specific environments, equipment, and unusual electrical installation conditions. Recognize when a general rule may not be sufficient.
Study electrical power relationships, power distribution, transformers, calculated loads, and electrical formulas. Practice calculations involving voltage, current, power, and other quantities used in electrical design and supervision.
Review motor branch-circuit conductors, overload protection, motor controllers, disconnects, and applicable motor calculation methods. Learn why motor circuits may use different rules for different protective functions.
Review the basic characteristics and installation rules for low-voltage and communication circuits, including separation and wiring-method requirements where applicable.
Study luminaires, lighting circuits, equipment installation, wiring connections, and applicable electrical rules.
Review illuminated sign installations, equipment, wiring, disconnects, and special electrical requirements for these systems.
Understand shock hazards, fault conditions, safe electrical work practices, protective equipment, and code-compliant safety procedures.
Study circuit breakers, fuses, equipment protection, protective-device selection, and how overcurrent requirements relate to conductors and connected loads.
Largest topic: Services, Feeders and Branch Circuits, 10 questions.
Second-largest: Grounding and Bonding, 10 questions.
Third-largest: Conductors and Cables, 8 questions.
Combined: 28 of 70 scored questions, or 40%.
PSI blueprint total: 70 questions across 13 areas.
Start by identifying the correct official test.
The Hawaii ES examination is called Supervising Electrician.
Use the official PSI content outline rather than a generic master-electrician examination description from another state.
The ES exam includes thirteen content categories.
Some are similar to the Journeyman Electrician test, but their relative weighting is different.
The Supervising Electrician examination places additional emphasis on electrical power, motors, overcurrent protection, and special equipment.
Those subjects relate directly to the responsibilities of electricians supervising larger and more complicated electrical installations.
Services and Feeders: Study distribution systems, feeder sizing, service equipment, branch circuits, and disconnects.
Grounding and Bonding: Review electrodes, grounding conductors, bonding jumpers, and fault-current paths.
Conductors: Practice ampacity, temperature limitations, adjustment factors, and conductor protection.
Electrical Power: Study electrical formulas, transformers, and load calculations.
Motors: Review motor conductors, controllers, overloads, and disconnects.
Overcurrent Protection: Study protective devices and applicable installation requirements.
Special Installations: Review equipment, occupancies, signs, lighting, and low-voltage systems.
Practice NEC navigation during every study session.
Learn the table of contents, the article index, and the location of important tables.
Article 100 definitions should be familiar.
Article 110 contains important general requirements for electrical installations.
The NEC chapters addressing branch circuits, feeders, services, grounding, overcurrent protection, and wiring methods deserve consistent review.
Motor rules, special equipment, and special conditions also matter.
Because PSI currently supplies the 2020 NEC, use that edition when practicing examination-specific lookups.
Newer 2026 NEC books may be used to understand updated code material, but candidates should not assume the two editions have identical language or section arrangements.
Study calculation problems methodically.
Identify the known quantities, determine which NEC provision applies, and complete the required calculation.
For service load problems, recognize the appropriate demand factors and equipment conditions.
For conductor sizing, check the relevant temperatures, insulation ratings, and adjustment rules.
For motor calculations, identify whether the question concerns conductors, short-circuit protection, overload protection, or another motor requirement.
For transformers, review basic power and current relationships.
For overcurrent protection, distinguish the protection of conductors from the protection of equipment.
The Hawaii Master Electrician Super Combo provides a coordinated collection of code, calculations, flash-card, and exam-study materials.
Another option is the Hawaii Master Electrician Study Guide and NEC Combo.
Use timed practice examinations to build speed.
Keep a record of incorrect answers and repeat the relevant NEC lookup or calculation.
The goal is to understand why an answer is correct rather than memorize a letter from a practice test.
Supervising electricians should understand how service equipment, feeders, protective devices, grounding systems, motors, and connected electrical loads operate together.
Conceptual exam-preparation illustration only, not an installation drawing or an engineering design.
Use these eight steps to organize your advancement toward Hawaii's official Supervising Electrician classification.
Determine whether your experience and intended work fit the Supervising Electrician classification rather than an industrial or specialty license.
Document at least four years registered as a Journey Worker Electrician or other equivalent experience accepted by Hawaii.
Collect license history, electrical work verification, and any required supporting application documents.
Use the current Electrician and Plumber licensing application and complete the Board's requirements.
Receive the Board's approval letter before scheduling the Supervising Electrician exam with PSI.
Focus on the 13 examination subjects and practice using the 2020 NEC listed in the bulletin.
Complete the 70-question, 180-minute exam and score at least 70%.
Follow Board renewal and competency rules. Pursue C-13 licensing separately if your goal is independent electrical contracting.
These percentages use the official PSI Supervising Electrician blueprint. All thirteen categories total 70 scored questions.
Total: 70 scored questions.
Top two categories: 20 questions, approximately 28.6%.
Top three categories: 28 questions, exactly 40%.
Exam: Three hours, 70% passing.
Electrical candidates should know exactly which NEC edition PSI provides before purchasing study materials.
For Hawaii's Supervising Electrician examination, the current published PSI bulletin identifies the 2020 NEC.
Contractor Exam Preps offers advanced electrical study bundles built around the 2026 NEC.
Both can have value, but they serve different purposes.
| Reference or Product | Edition | Primary Use |
|---|---|---|
| National Electrical Code | 2020 | The exam-room reference supplied by PSI for Hawaii Supervising Electrician testing. |
| Hawaii State Electrical Construction Code | 2020 NEC with Applicable Amendments | State construction code basis, subject to applicable county rules. |
| Hawaii Master Electrician Study Guide | 2026 NEC Based | Master-level electrical theory, services, grounding, motors, equipment, and NEC study. |
| Electrician Calculations Study Guide | 2026 NEC Based | Service loads, conductor calculations, box fill, motor circuits, and formulas. |
| National Electrical Code Paperback with Tabs | 2026 | Current-code study and organized reference-navigation practice outside the exam center. |
| Master Electrician Flash Cards | 2026 NEC Based | Quick review of formulas, terms, code principles, equipment, and safety. |
| Hawaii Master Electrician Super Combo | 2026 | Four-part study package combining electrical theory, calculations, NEC, and flash cards. |
| Hawaii Master Electrician Study Guide and NEC Combo | 2026 | Smaller Hawaii master-level guide and tabbed NEC package. |
| General Master Electrician Calculations Combo | 2026 | Additional master-level calculation practice, not a Hawaii-specific book title. |
| National Electrical Safety Code | 2017 in PSI List | Not allowed as an examination reference. |
| NFPA 72 Fire Alarm and Signaling Code | 2016 in PSI List | Not allowed as an examination reference. |
| Ugly's Electrical References | 2020 in PSI List | Not allowed as an examination reference. |
| OSHA 29 CFR Part 1926 | Applicable Regulations | Safety study, not an allowed examination reference. |
Exam codebook: 2020 NEC supplied by PSI.
Current store packages: 2026 NEC based.
Tabs and highlighting: Appropriate for private study, but personal references cannot be brought into the PSI exam room.
Before testing: Confirm the current bulletin for any reference or code-edition updates.
Hawaii's Supervising Electrician examination is open book, but that does not mean candidates can bring an unlimited collection of electrical reference materials.
PSI provides the approved 2020 NEC.
Candidates should become comfortable using a standard, untabbed copy during practice.
Questions: 70 scored.
Time: 180 minutes.
Average time: Approximately 2.57 minutes per scored question.
Approved reference: PSI-supplied 2020 NEC.
2026 study books: For preparation outside the exam center.
The Hawaii Supervising Electrician license is an advanced individual electrical trade credential.
Under the state's license definition, a Supervising Electrician may perform electrical work and direct or supervise the performance of electrical work.
This classification is important because many electrical projects require experienced workers who can manage technical installation activities and recognize potential hazards.
A supervising electrician may help coordinate the installation of electrical distribution systems, motor equipment, lighting, branch circuits, service equipment, feeders, and connected components.
The actual work must remain within applicable licensing, employment, construction, and safety requirements.
Electrical supervision includes reviewing equipment and conductor selections.
It may involve confirming that panelboards, feeders, branch circuits, grounding systems, disconnects, and protective devices are installed as required.
For example, a commercial electrical installation could involve several panelboards connected to a common service distribution system.
A supervisor must understand which conductors supply each panelboard and how the connected electrical loads affect system design.
Grounding and bonding must be evaluated correctly.
Special equipment may require additional code provisions.
Where motors are installed, the electrical system must provide appropriate conductors, controls, overload protection, and disconnecting means.
The Supervising Electrician exam covers these subjects because mistakes in a larger electrical installation can affect more than one circuit or room.
However, supervising electrical work and independently contracting for electrical work are legally different activities.
The ES license does not automatically grant the right to establish or operate an electrical contracting company.
For regulated electrical contracting, Hawaii requires a separate contractor license.
The appropriate general electrical contractor classification is C-13.
Contractor licensing is administered by Hawaii's Contractors License Board, not solely by the Board of Electricians and Plumbers.
Applicants who want to offer electrical contracting services directly should review the C-13 eligibility, examinations, and business requirements.
Another distinction concerns industrial work.
Hawaii issues a separate Supervising Industrial Electrician license, ESI.
That classification addresses industrial electrical supervision and has its own examination requirements.
The ES and ESI exam blueprints are not identical.
For professionals seeking higher-level electrical responsibility, understanding the exact license title prevents wasted time and incorrect examination preparation.
ES: Supervising Electrician.
ESI: Supervising Industrial Electrician.
EJ: Journey Worker Electrician.
C-13: Electrical Contractor.
Key distinction: An ES individual trade license does not replace a contractor license.
| Classification | License Code | Main Difference |
|---|---|---|
| Journey Worker Electrician | EJ | Individual trade license for electrical work. |
| Supervising Electrician | ES | Advanced trade license allowing qualifying performance and supervision of electrical work. |
| Supervising Industrial Electrician | ESI | Separate industrial supervision classification. |
| Supervising Specialty Electrician | ESS | Separate supervision classification for specified electrical specialties. |
| Electrical Contractor | C-13 | Separate authority for regulated electrical contracting business activity. |
| Journeyman Entry Experience | EJ | Generally five years and 10,000 qualifying electrical work hours. |
| Supervising Experience | ES | Four years registered as Journey Worker or equivalent qualifying experience. |
| Industrial Supervisor Experience | ESI | Three years as Journey Worker Industrial or equivalent. |
| Journey Worker Exam | EJ | 70 scored questions, 180 minutes, 70% passing. |
| Supervising Electrician Exam | ES | 70 scored questions, 180 minutes, 70% passing, different topic weighting. |
| Supervising Industrial Exam | ESI | 70 scored questions, 180 minutes, 70% passing, industrial-focused blueprint. |
| Supplied PSI Reference | ES | 2020 NEC, supplied at the test center. |
| Supervising Electrician Renewal | ES | Three-year cycle, next regular renewal June 30, 2029. |
| Independent Contracting | C-13 | Separate contractor license and relevant Board procedures required. |
Master-level exam preparation: Hawaii Supervising Electrician, ES.
Industrial supervision: ESI is different from ES.
Independent contracting: C-13 is separate from the individual electrician credential.
Advanced Trade Qualification
Hawaii DCCA Requirements
70 Questions, Three Hours
Experience requirement: Four years as registered Journey Worker Electrician or accepted equivalent.
2020 NEC: Examination reference provided by PSI.
C-13 license: Separate application and contracting authority.
This six-week schedule follows the Supervising Electrician blueprint and adds regular NEC and electrical calculation practice.
The Hawaii Supervising Electrician examination is challenging because it tests knowledge associated with experienced electricians who perform and supervise electrical work.
A candidate may have years of electrical field experience but still need preparation for a formal PSI examination.
The test requires understanding electrical theory, reading NEC provisions, making calculations, and selecting appropriate installation methods.
It also requires time management.
Candidates receive 180 minutes for 70 scored questions.
That provides an average of approximately 2.57 minutes per scored question.
Not every question will require the same amount of time.
Some questions involve a straightforward definition.
Others may require several steps of calculation or reference lookup.
For example, a service load calculation can involve more than adding a few electrical ratings.
The correct result may depend on applicable load categories, demand factors, and the conditions identified in the question.
A conductor sizing question may require locating the appropriate ampacity table and applying a temperature correction or adjustment.
A grounding question may require distinguishing between equipment grounding and bonding provisions.
A motor question may involve conductor sizing, overload protection, short-circuit protection, or disconnecting means.
Those are related subjects, but they are not the same calculation.
The exam also includes illuminated signs and low-voltage communication circuits.
These categories contain fewer questions, but candidates should still review them.
Another challenge involves NEC edition differences.
PSI currently uses the 2020 NEC for the Supervising Electrician examination.
Contractor Exam Preps' current Hawaii Master Electrician packages use the 2026 NEC.
Students using those packages should understand when a new code rule differs from the older testing reference.
The study books are useful for practicing concepts and code navigation, but they are not substitutes for the reference edition specified by PSI.
Open-book testing can also create false confidence.
Even though the NEC is available, searching for every answer without a clear strategy can waste too much time.
The best preparation combines memorized electrical fundamentals with a strong understanding of where important code rules are located.
The 2026 Hawaii Master Electrician Super Combo includes electrical calculations practice, a study guide, codebook, and flash cards.
The Hawaii Master Electrician Study Guide and NEC Combo offers a smaller book-focused study option.
Both can support organized preparation when combined with accurate knowledge of the official Hawaii examination reference.
Consistent study helps candidates recognize electrical problems faster and work through them more carefully.
Exam: Supervising Electrician, ES.
Questions: 70 scored.
Time: 180 minutes.
Passing: 70%.
Book: PSI provides the 2020 NEC.
Contractor Exam Preps offers Hawaii-specific master-level electrical study packages that combine study guides, NEC references, electrical calculations, and flash cards.
These products use the 2026 NEC and should be used with awareness of the 2020 NEC currently supplied by Hawaii PSI.
Hawaii Master-Level Complete Study Package
Hawaii Study Guide and Tabbed Codebook
Additional General Master-Level Math Preparation
Hawaii-specific study packages: The Super Combo and Hawaii Master Electrician Study Guide and NEC Combo.
General master-level study: The third package is not titled as Hawaii-specific.
All listed packages: Based on the 2026 NEC.
Hawaii PSI test reference: The 2020 NEC is supplied by the examination center.
Availability: Check stock, edition, contents, and shipping terms on each product page.
The featured image is loaded from the matching product listing on ContractorExamPreps.com. The study-set illustration remains visible if that store image cannot be loaded.
This educational credential illustration shows the Hawaiian islands, a lightning bolt, an electrical panelboard, and the ES Supervising Electrician designation.
It represents advanced electrical exam preparation.
It is not an official Hawaii professional license or proof of passing an examination.
The linked product image comes from the Contractor Exam Preps Hawaii Master Electrician Super Combo product listing.
• Hawaii Supervising Electrician
• ES License Classification
• Master-Level Electrical Preparation
• Hawaii Board of Electricians and Plumbers
• PSI Supervising Electrician Exam
• 70 Scored Questions
• 180 Minutes
• 70% Passing
• Open-Book Testing
• PSI-Supplied 2020 NEC
• Four Years Journey Worker Experience
• Electrical Theory
• Service Equipment
• Feeder and Branch Circuits
• Service Load Calculations
• Grounding and Bonding
• Grounding Electrode Conductors
• Equipment Grounding Conductors
• Conductors and Cables
• Ampacity Calculations
• Adjustment and Correction Factors
• Raceways and Boxes
• Electrical Power
• Motors and Transformers
• Overcurrent Protection
• Protective Devices
• Special Occupancies
• Low-Voltage Systems
• Communication Circuits
• Lighting and Illuminated Signs
• Electrical Safety
• NEC Code Navigation
• Electrical Supervision
• Timed Practice Exams
• Hawaii License Renewal
• Separate C-13 Contractor Licensing
Prepare through structured electrical review, code navigation, calculation practice, and realistic PSI examination simulations.
Hawaii Master Electrician Licensing
Hawaii's corresponding statewide master-level credential is officially called Supervising Electrician, license code ES. Master Electrician is often used as a study-product name.
ES.
The Hawaii Board of Electricians and Plumbers through the Department of Commerce and Consumer Affairs.
Applicants generally must have been registered as a Journey Worker Electrician for four years or demonstrate equivalent experience accepted by the Board.
Yes. Hawaii law allows qualifying equivalent experience, subject to Board acceptance and proper documentation.
Four years registered as a Journey Worker Electrician is the standard pathway, but the Board may also consider equivalent qualifying experience.
Hawaii does not provide general reciprocity for its electrician licenses. Out-of-state applicants must follow the applicable Hawaii qualification process.
Yes. The Board must approve the application before the candidate registers with PSI.
PSI Supervising Electrician Exam
The official Supervising Electrician examination contains 70 scored questions.
180 minutes, or three hours.
70%, equivalent to at least 49 correct scored answers out of 70.
Yes. PSI supplies the approved National Electrical Code reference at the testing center.
Yes. PSI may include up to ten experimental questions that are not included in the scored total.
Two years from the examination approval period established by the Board and PSI.
NEC Codebooks and Reference Editions
The current published PSI candidate bulletin lists the 2020 National Electrical Code as the provided examination reference.
No. PSI supplies the examination reference. Personal NEC codebooks are not permitted.
No. A tabbed 2026 NEC may be useful for studying, but candidates must use the 2020 NEC reference provided by PSI for the current examination.
The 2026 NEC supports newer-code education, current electrical concepts, and reference navigation practice. The active PSI examination reference edition may differ.
Yes. Practice with the edition PSI lists for the Supervising Electrician examination, while using newer materials for supplemental study.
No. The published PSI bulletin identifies Ugly's Electrical References as not allowed for this examination.
Official Exam Subjects
Services, Feeders and Branch Circuits and Grounding and Bonding, with ten questions each.
Eight scored questions.
Ten scored questions.
Yes. Electrical Power is a separate six-question category, and calculations are important across several other subjects.
Six scored questions are assigned to Motors.
Yes. It accounts for four scored questions in the Supervising Electrician blueprint.
Yes. Illuminated Signs accounts for two scored questions.
Yes. Lighting and Safety Information contain four questions each.
Trade Licensing vs. Contracting
Yes. The ES license is an advanced individual credential allowing qualifying electrical work and supervision under Hawaii law.
Not with the ES license alone. Independent regulated electrical contracting requires a separate contractor license.
C-13 Electrical Contractor, regulated separately by the Hawaii Contractors License Board.
No. Supervising Industrial Electrician is ESI and has a separate experience requirement and examination blueprint.
Every three years. The next regular electrician renewal deadline is June 30, 2029.
Contractor Exam Preps Products
Yes. The store sells Hawaii Master Electrician study packages based on the 2026 NEC, intended for advanced electrical study and preparation.
The listed package includes the 2026 Hawaii Master Electrician Study Guide, Electrician Calculations Study Guide, NEC 2026 paperback with tabs, and Master Electrician Flash Cards.
Yes. The Hawaii Master Electrician Study Guide and NEC Combo pairs the Hawaii-focused guide with a tabbed 2026 NEC.
Yes. The general Master Electrician and Electrician Calculations Combo includes electrical math study materials and a 2026 NEC paperback.
No. Study resources help with preparation but do not replace qualification requirements or guarantee any examination result.
Watch this related 1ExamPrep video covering advanced electrical exam preparation, NEC updates, grounding and bonding, load calculations, overcurrent protection, and reference-navigation strategies.
The video is relevant to electricians advancing toward supervisory-level knowledge.
It discusses the 2026 NEC, so Hawaii candidates must remember that PSI currently provides the 2020 NEC for the official Supervising Electrician examination.
Video: Master Electrician Exam Prep 2026 NEC Updates.
Source: 1ExamPrep.
Topics: NEC code updates, electrical power, advanced load calculations, grounding, bonding, overcurrent protection, and exam strategies.
Hawaii ES exam: 70 scored questions, 180 minutes, 70% passing.
Hawaii PSI reference: 2020 NEC supplied at the testing center.
Use these Contractor Exam Preps products and official licensing resources to prepare for the Supervising Electrician examination and review the requirements for advanced electrical work in Hawaii.
Official Hawaii trade credential: Supervising Electrician, ES.
PSI examination: 70 scored questions, 180 minutes, 70% passing.
Exam reference: 2020 NEC supplied by PSI.
Experience: Four years registered as Journey Worker Electrician or approved equivalent.
Store study products: 2026 NEC based.
Next regular renewal: June 30, 2029.
Independent contracting: Separate C-13 Electrical Contractor license.
Preparing for advanced electrician licensing in Hawaii requires a clear understanding of the state's official license classifications, the correct PSI examination, and the electrical subjects tested.
Many professionals search for a Hawaii Master Electrician license because that is a familiar title in the electrical industry.
However, Hawaii uses the official Supervising Electrician classification for its corresponding advanced individual electrical credential.
The license code is ES.
This credential is regulated by the Hawaii Board of Electricians and Plumbers through the Department of Commerce and Consumer Affairs.
The Supervising Electrician license allows a properly qualified professional to perform electrical work and direct or supervise electrical work within the applicable state requirements.
It recognizes knowledge and experience associated with higher-level electrical responsibility.
Qualifying for the ES examination generally requires four years registered as a Journey Worker Electrician or an equivalent level of electrical experience acceptable to the Board.
Applicants must provide the appropriate application and supporting documents for Board review.
Once approved, they may schedule the Supervising Electrician examination with PSI.
The official examination contains 70 scored questions and allows 180 minutes.
The minimum passing score is 70%, equivalent to 49 correct scored answers.
The examination is open book, but reference rules are important.
PSI currently provides the 2020 National Electrical Code at the testing center.
Candidates cannot bring personal highlighted or tabbed codebooks into the examination room.
For that reason, practicing with the correct code edition is an important part of preparation.
Contractor Exam Preps sells current Hawaii Master Electrician study packages based on the 2026 NEC.
These products can help students understand newer code requirements, strengthen calculations, and improve NEC navigation.
However, the 2026 study edition should not be confused with the 2020 code edition currently used by Hawaii PSI.
Candidates should verify the reference edition before testing and compare any newer materials with the actual examination reference.
The official Supervising Electrician exam covers thirteen content areas.
Services, Feeders and Branch Circuits is one of the largest, containing ten questions.
Grounding and Bonding also contains ten questions.
Conductors and Cables follows with eight.
These three categories alone account for 28 of the 70 scored questions, or 40% of the examination.
Other important areas include General Electrical Knowledge, Electrical Power, Motors, Overcurrent Protection, Raceways and Boxes, Special Occupancies, Lighting, Low-Voltage Systems, Illuminated Signs, and Safety.
Master-level study should emphasize how these electrical systems work together.
A service calculation may affect feeder sizing and connected equipment.
A conductor selection may depend on ampacity, installation conditions, and temperature correction factors.
A motor installation may require separate consideration of branch-circuit conductors, overload protection, and disconnecting means.
Grounding and bonding must be understood correctly because they provide distinct electrical safety functions.
The examination also tests the ability to navigate technical information within a limited amount of time.
With 70 scored questions and three hours available, candidates should practice recognizing the subject of each question and identifying the relevant NEC provisions quickly.
Study books and flash cards can help create that routine.
The 2026 Hawaii Master Electrician Super Combo combines a Hawaii Master Electrician Study Guide, an Electrician Calculations Study Guide, the 2026 NEC paperback with tabs, and Master Electrician Flash Cards.
This combination supports electrical theory study, calculation practice, current-code education, and quick concept review.
The Hawaii Master Electrician Study Guide and NEC Combo is another option for candidates who prefer a smaller book package.
Students who need additional mathematics practice can explore the General Master Electrician and Calculations Book Combo.
These resources support preparation but do not replace the qualifications established by Hawaii law or guarantee examination results.
A consistent six-week study plan can help candidates organize their time.
Begin with electrical theory and NEC navigation.
Continue with services, feeders, grounding, bonding, conductors, and cables.
Then review electrical power, motor calculations, overcurrent protection, raceways, special equipment, lighting, signs, and safety.
During the final week, take several timed practice examinations and review incorrect answers carefully.
It is also important to understand the difference between advanced electrical trade licensing and independent contracting.
The Supervising Electrician ES credential does not automatically authorize someone to operate an electrical contracting business.
A separate C-13 Electrical Contractor license is required for regulated independent contracting activity.
Electricians whose goal is business ownership should review that additional licensing process rather than assuming the ES examination covers everything.
With appropriate experience, Board approval, organized study materials, calculation practice, and familiarity with the official 2020 NEC examination reference, Hawaii Supervising Electrician candidates can approach advanced licensing with a clearer plan.
Find advanced electrical study guides, NEC reference books, calculations materials, and exam preparation at ContractorExamPreps.com.
