Current Massachusetts Master format: Part I contains 90 questions in 240 minutes and Part II Business and Law contains 50 questions in 120 minutes. Each part requires 70% to pass. Both are open book under current PSI and Board reference rules.
What Is the Massachusetts Master Electrician Exam?
The Massachusetts Master Electrician examination is a two-part licensing test administered through PSI for the Massachusetts Board of State Examiners of Electricians. Part I measures advanced electrical trade and code knowledge. Part II focuses on Business and Law, including Massachusetts licensing, contracts, safety, estimating, finance, taxes, labor, project management and lien law.
Massachusetts Master Electrician preparation requires more than NEC memorization. Candidates need strong code navigation, accurate calculations, knowledge of Massachusetts-specific amendments and laws, and enough business-law knowledge to handle contractor-level responsibilities.
Exam answer: Part I has 90 questions, a four-hour limit and requires 63 correct answers for 70%. Part II has 50 questions, a two-hour limit and requires 35 correct answers for 70%.
2026 code transition: Massachusetts adopted its 2026 Electrical Code based on the 2026 NEC effective April 24, 2026. Board records indicated corresponding exam changes were being coordinated for the 2026 transition, so candidates should verify the active PSI bulletin and permitted references for their scheduled test date.
The current Part I blueprint gives 46 of 90 questions to Wiring Methods and Devices, Services, Grounding and Bonding, and Special Occupancies and Equipment. Those four subjects should receive the largest share of technical exam-prep time.
This page uses 12 authority and official-reference groups for licensing, code, examination, safety and business-law context, with commercial prep sources used only as supporting research. Massachusetts Board and PSI requirements control whenever commercial pages differ.
Massachusetts Master Electrician Exam Domains
Match your Massachusetts electrical license prep time to the current 90-question Part I blueprint and 50-question Business and Law Part II blueprint.
| Exam Area | What to Study | Questions |
|---|---|---|
| Part I: Wiring Methods and Devices | Conductors, raceways, cables, boxes, wiring devices, installation rules, fill, support and NEC wiring methods | 15 |
| Part I: Services | Service conductors, service equipment, load calculations, disconnects, ratings and installation requirements | 11 |
| Part I: Grounding and Bonding | Grounding electrode systems, bonding, equipment grounding, sizing, fault paths and NEC grounding rules | 10 |
| Part I: Special Occupancies and Equipment | Hazardous locations, healthcare, pools, EV equipment, generators, emergency systems and special installations | 10 |
| Part I: Motors | Motor circuits, overloads, short-circuit protection, conductor sizing, controllers and calculations | 7 |
| Part I: Advanced Electrical Knowledge and Theory | Electrical theory, formulas, calculations, power, voltage, current and advanced trade concepts | 6 |
| Part I: Overcurrent Protection | Circuit protection, OCPD sizing, coordination, conductor protection and NEC rules | 6 |
| Part I: Alarm Systems | Fire alarm concepts, NFPA 72, signaling systems and applicable Massachusetts requirements | 6 |
| Part I: Photovoltaic | PV circuits, conductors, disconnects, overcurrent protection, rapid shutdown and NEC solar requirements | 6 |
| Part I: State-Specific Electrical Requirements | Massachusetts electrical amendments, licensing requirements, state rules and Board requirements | 4 |
| Part I: Energy Storage Systems | ESS equipment, disconnects, protection, installation rules and code requirements | 4 |
| Part I: Low-Voltage Distribution | Low-voltage systems, circuits, equipment and distribution concepts | 2 |
| Part I: Lighting | Lighting loads, luminaires, controls and applicable NEC provisions | 2 |
| Part I: Transformers | Transformer sizing, protection, grounding and installation requirements | 1 |
| Part II: Massachusetts Licensing | License classifications, Board rules, permits, supervision, business licensing and legal responsibilities | 16 |
| Part II: Contracts | Contract formation, scope, changes, obligations, documents and contractor responsibilities | 6 |
| Part II: Environmental and Safety | OSHA, environmental responsibilities, jobsite safety and contractor compliance | 5 |
| Part II: Estimating and Bidding | Takeoffs, labor, materials, bid preparation, costs and estimating practices | 4 |
| Part II: Risk Management | Insurance, risk transfer, liability and contractor risk controls | 4 |
| Part II: Financial Management | Cash flow, accounting basics, financial controls and business records | 3 |
| Part II: Tax Laws | Tax responsibilities, records and contractor obligations | 3 |
| Part II: Labor Laws | Employment rules, wage obligations and contractor labor responsibilities | 3 |
| Part II: Project Management | Scheduling, coordination, documentation, supervision and project controls | 3 |
| Part II: Business Organization | Business structures, responsibilities and organization concepts | 2 |
| Part II: Lien Law | Massachusetts mechanic's lien concepts and contractor rights | 1 |
Massachusetts Master Electrician Exam Breakdown
Master Electrician Part I90 questions | 240 minutes | 63 correct to pass
Business & Law Part II50 questions | 120 minutes | 35 correct to pass
Testing ProviderPSI Services LLC
Licensing AuthorityMassachusetts Board of State Examiners of Electricians
Exam FormatTwo-part open-book examination
Largest Part I TopicWiring Methods and Devices | 15 questions
Largest Part II TopicMassachusetts Licensing | 16 questions
Standard Experience PathAt least 1 year as a Massachusetts Journeyman Electrician actively engaged in electrical work
Master Education Requirement150-hour Board-approved Master Electrician education program
Massachusetts Master Electrician Licensing and Contractor Career Path
The Massachusetts Class A Master Electrician license is the advanced personal electrical license used for higher-level supervision, business responsibility and contractor work. Candidates must meet the state eligibility and education requirements before qualifying for the Master examination.
Journeyman experience: the standard path requires at least one year as the holder of a Massachusetts Journeyman Electrician license while actively engaged in electrical work.
Master education: candidates complete a 150-hour Board-approved Master Electrician education program covering advanced code, calculations, Massachusetts laws, business practices and related master-level material.
Business path: Massachusetts electrical business licensing requires a Massachusetts licensed Master Electrician to serve as the Licensee of Record for the business, subject to Board requirements.
Reciprocity: Massachusetts currently identifies electrician reciprocity with New Hampshire for qualifying personal licenses, not company licenses.
What Is on the Massachusetts Master Electrician Exam?
Part I bars are scaled against the 15-question Wiring Methods and Devices category. Part II bars are scaled against the 16-question Massachusetts Licensing category.
Part I: Wiring Methods and Devices15 questions
Part I: Services11 questions
Part I: Grounding and Bonding10 questions
Part I: Special Occupancies and Equipment10 questions
Part I: Motors7 questions
Part I: Theory / Overcurrent / Alarm / PV6 each
Part II: Massachusetts Licensing16 questions
Part II: Contracts6 questions
Part II: Environmental and Safety5 questions
Part II: Estimating and Bidding / Risk Management4 each
Massachusetts Master Electrician Exam References and Study Materials
The exam is open book, but candidates should use only the references and book conditions allowed by the active PSI bulletin and Massachusetts Board policies.
| Reference | Primary Use | Study Note |
|---|---|---|
| National Electrical Code | Wiring methods, services, grounding, overcurrent protection, motors, special occupancies, photovoltaic, ESS and general NEC questions | Massachusetts currently enforces the 2026 NEC-based state electrical code; verify the active PSI exam reference for your test date |
| 527 CMR 12.00 Massachusetts Electrical Code | Massachusetts amendments to the NEC and state-specific installation requirements | Critical for Massachusetts-specific exam prep |
| NFPA 72 National Fire Alarm and Signaling Code | Alarm-system questions and fire alarm code concepts | Part I includes 6 alarm-system questions |
| 237 CMR and Massachusetts General Laws | Licensing, supervision, examination, permits and electrician regulations | Major source for both technical state requirements and Business and Law |
| NASCLA Contractors Guide to Business, Law and Project Management | Contracts, estimating, project management, financial management, risk and business operations | Central Part II business reference |
| OSHA 29 CFR Part 1926 | Construction safety and environmental/safety questions | Part II contains 5 Environmental and Safety questions |
Your Massachusetts Master Electrician Contractor Licensing Roadmap
Confirm your Journeyman experience, complete Master education, prepare approved references, study both PSI parts, pass the technical and Business and Law exams and complete Massachusetts Master licensing.
1
Confirm Master Electrician eligibility
Verify at least one year of active work as a Massachusetts licensed Journeyman Electrician.
2
Complete the 150-hour Master education program
Finish the Board-approved Master curriculum covering advanced electrical code, calculations, Massachusetts laws and business practices.
3
Review the current PSI bulletin
Confirm the active Part I and Part II format, score-validity rules and permitted exam references.
4
Prepare the correct NEC and state references
Study with the current Massachusetts electrical code and verify the exact references allowed for your scheduled exam date during the 2026 transition.
5
Study Part I by official weight
Prioritize wiring methods, services, grounding and bonding, special occupancies, motors, overcurrent protection, alarm systems, PV and ESS.
6
Study Business and Law Part II
Prioritize Massachusetts licensing, contracts, safety, estimating, risk, finance, taxes, labor, project management and lien law.
7
Pass both PSI exam parts
Complete the 90-question Part I and 50-question Part II exams and earn at least 70 percent on each within the current 12-month score-validity window.
Six-Week Massachusetts Master Electrician Exam Prep Plan
Week 1
Blueprint and NEC Navigation
- Review both PSI exam parts
- Confirm current exam references
- Practice NEC index and article navigation
- Take a diagnostic Part I exam
Week 2
Wiring Methods and Services
- Conductors and raceways
- Boxes, cables and devices
- Services and load calculations
- Feeder and service protection
Week 3
Grounding, Motors and Protection
- Grounding and bonding
- Motor calculations
- Overcurrent protection
- Advanced electrical theory
Week 4
Special Systems
- Special occupancies
- Alarm systems
- Photovoltaic systems
- Energy storage systems
Week 5
Business and Law
- Massachusetts licensing
- Contracts and estimating
- Safety and risk
- Finance, labor, taxes and liens
Week 6
Timed PSI Simulation
- 90-question four-hour Part I practice
- 50-question two-hour Part II practice
- Reference-navigation drills
- Final weak-area review
Massachusetts Open-Book Master Electrician Exam Prep Strategy
Do this during exam prep
- Practice with the exact references allowed for your test date
- Learn where high-frequency NEC articles and tables live
- Use qualifying permanent tabs and permitted highlighting
- Practice Massachusetts amendments and state-law lookup
- Work technical calculations under time limits
- Complete full-length Part I and Part II simulations
Avoid these mistakes
- Bringing unauthorized reference material
- Using worked-out answers or prohibited inserted notes
- Assuming the 2026 field code automatically equals the active exam reference
- Ignoring Business and Law Part II
- Studying only generic NEC questions
- Practicing without code-navigation timing
Open-book strategy: identify the question type first, choose the correct NEC article, Massachusetts amendment, statute or business reference, confirm the rule and exception, then move on. Part I averages about 2.7 minutes per question. Part II averages about 2.4 minutes per question.
Massachusetts Master Electrician Contractor Exam Prep Options
2026 Massachusetts Master Study Guide + NEC with Tabs
Massachusetts-Specific Open-Book Exam Prep
- 2026 Massachusetts Master Electrician Study Guide
- 2026 NEC paperback with tabs
- 12 open-book practice exams
- 2 final exams with analysis
- Massachusetts licensing information
Master + Calculations Study Guides + 2026 NEC
Advanced Technical and Calculation Prep
- Massachusetts Master Electrician Study Guide
- Electrician Calculations Study Guide
- 2026 NEC paperback
- Service, feeder and conductor calculations
- Motor, box-fill and raceway-fill practice
2026 Master Electrician Study Guide + NEC with Tabs
General Master-Level NEC Prep
- Master Electrician study guide
- 2026 NEC with tabs
- Grounding and bonding review
- Load calculations and conductor sizing
- Open-book code-navigation practice
Massachusetts transition reminder: the 1 Exam Prep products above are based on the 2026 NEC, matching Massachusetts' current 2026 NEC-based state electrical code. Candidates should still verify the active PSI bulletin and Board exam-material rules for the exact references permitted on their scheduled exam date.
Massachusetts Master Electrician Is the Advanced Contractor-Level Personal License
The Massachusetts Class A Master Electrician license supports advanced supervision and business responsibility. Electrical business entities must separately meet Massachusetts business-license requirements, including the Licensee of Record requirement.
· Part I: 90 questions
· Part I: 240 minutes
· Part II: 50 questions
· Part II: 120 minutes
· 70% required on each part
· Open-book PSI testing
Massachusetts Master Electrician Contractor Exam Prep FAQ
Massachusetts Master Electrician Exam Basics
The current PSI bulletin lists 90 questions for Master Electrician Part I.
Candidates currently receive 240 minutes, or four hours, for Part I.
A minimum score of 70 percent is required. On the current 90-question Part I exam, that equals 63 correct answers.
The current PSI bulletin lists 50 questions for Part II Business and Law.
Candidates currently receive 120 minutes, or two hours, for the Business and Law exam.
A minimum score of 70 percent is required. On the current 50-question Part II exam, that equals 35 correct answers.
Yes. The current Massachusetts Master Electrician examinations are open book, subject to the approved-reference and book-condition rules in the active PSI bulletin and Board policies.
Yes. Part I and Part II are independently scored, but both must be passed for Master Electrician licensure.
The current PSI bulletin states that passing scores are valid for 12 months.
Wiring Methods and Devices is the largest current Part I category with 15 questions.
The current PSI blueprint lists 11 questions in the Services category.
Grounding and Bonding accounts for 10 questions on the current Part I blueprint.
Special Occupancies and Equipment accounts for 10 questions on the current PSI outline.
Massachusetts Licensing is the largest Business and Law category with 16 of the 50 questions.
Massachusetts Licensing, 2026 NEC and Contractor Prep
The standard pathway requires at least one year as the holder of a Massachusetts Journeyman Electrician license while actively engaged in electrical work.
The standard pathway includes completion of a 150-hour Board-approved Master Electrician education program.
Massachusetts adopted its 2026 Electrical Code based on the 2026 NEC effective April 24, 2026. Because exam changes were being coordinated for the 2026 transition, candidates should verify the active PSI bulletin and Board rules for the exact references required on their scheduled test date.
Massachusetts exam policies permit approved references to be permanently indexed or tabbed and allow highlighting and underlining, subject to the current Board and PSI rules.
Only limited markings are allowed. Massachusetts policies distinguish permitted highlighting, underlining and certain limited reference markings from prohibited worked-out answers, step-by-step solutions, inserted papers and other unauthorized material. Check the current policy before preparing your books.
Start with Wiring Methods and Devices, Services, Grounding and Bonding, and Special Occupancies and Equipment. Together those four areas account for 46 of the 90 Part I questions.
Start with Massachusetts Licensing, then Contracts, Environmental and Safety, Estimating and Bidding, Risk Management, Financial Management, Tax Laws, Labor Laws and Project Management.
A Massachusetts electrical business license requires the business to have or contract with a Massachusetts licensed Master Electrician who serves as the Licensee of Record, subject to current Board requirements.
1 Exam Prep Master Electrician 2026 NEC Exam Prep Video
Explore Massachusetts Master Electrician Exam Prep Resources
2026 Massachusetts Master Study Guide + NEC
Master + Calculations Study Guide Combo
Massachusetts Contractor License Exam Prep
Current PSI Massachusetts Electrician Bulletin
Massachusetts Electrical Code
Massachusetts Board of State Examiners of Electricians
Massachusetts Electrical Business License
Massachusetts Electrician Licensing FAQ
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Massachusetts Master Electrician Exam Prep
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