Washington Nonresidential Maintenance Master Electrician Book Package

Prepare for the Washington Nonresidential Maintenance Master Electrician examination with a focused reference package built around the electrical code, Washington electrical law, and state administrative rules used for the 07 Nonresidential Maintenance specialty. This package includes the Revised Code of Washington (RCW) Chapter 19.28, Washington Administrative Code (WAC) Chapter 296-46B, and the National Electrical Code, NEC, 2020 Edition.

Washington officially identifies this specialty as 07 Nonresidential Maintenance. The specialty is centered on maintenance, repair, and replacement of existing electrical equipment and conductors in nonresidential settings. Its scope is different from unrestricted general electrical installation work because the 07 classification is primarily intended for maintaining existing electrical systems rather than performing broad new electrical construction.

The Washington Nonresidential Maintenance Master Electrician examination tests technical NEC knowledge, electrical theory, and Washington electrical laws and rules. Candidates should be prepared for a broad range of subjects because maintenance electricians may encounter services, wiring methods, grounding and bonding, motors, electrical equipment, hazardous locations, special occupancies, emergency systems, and other systems during nonresidential maintenance work.

Washington electrical examinations are open book. Candidates may bring approved reference materials into the examination room, making efficient reference navigation an important part of preparation. Candidates should learn how to recognize whether a question is controlled by the NEC, RCW Chapter 19.28, or WAC Chapter 296-46B and then locate the applicable requirement efficiently.

The 07 specialty also includes authority to perform work assigned to several narrower maintenance specialties. That means candidates should prepare for a wider range of maintenance-related electrical topics than the classification name alone may suggest. Understanding both the technical requirements and the legal limits of the specialty is an important part of Master Electrician preparation.

This package brings the three primary references together for organized study. The NEC provides national electrical installation requirements, RCW Chapter 19.28 establishes Washington electrical law, and WAC Chapter 296-46B contains detailed rules governing certification, specialty scope, supervision, contractors, examinations, permits, inspections, and electrical installations.

What You Get

• Revised Code of Washington (RCW) Chapter 19.28
  Washington electrical law covering electricians, Master Electricians, electrical contractors, electrical installations, certification, enforcement, responsibilities, and other statutory requirements affecting electrical work in the state.
• Washington Administrative Code (WAC) Chapter 296-46B
  Washington's detailed electrical safety, certification, examination, specialty-scope, contractor, permit, inspection, supervision, and installation rules. This reference defines the 07 Nonresidential Maintenance specialty and its permitted work.
• National Electrical Code, NEC, 2020 Edition
  The NEC edition used for the Washington examination program covered by this package. It provides technical requirements for services, grounding and bonding, wiring methods, motors, electrical equipment, hazardous locations, special occupancies, emergency systems, communications, and other systems relevant to maintenance work.

Exam Details

The Washington 07 Nonresidential Maintenance Master Electrician examination contains two required sections: NEC & Theory and Washington Codes.

• NEC & Theory: Approximately 54 questions
• Time Allowed for NEC & Theory: 3 hours
• Washington Codes: Approximately 20 questions
• Time Allowed for Washington Codes: 1 hour
• Total Questions: Approximately 74 questions across both sections
• Total Testing Time: Approximately 4 hours across both sections
• Passing Score: 70% or greater on each required examination section
• Exam Type: Open book
• Testing Provider: PSI
• Primary Code Reference: National Electrical Code, NEC, 2020 Edition

The published NEC & Theory outline for the 07 Master Electrician examination includes approximately one question from NEC Article 90, three from NEC Articles 100 through 110, two from wiring and protection, two from services, four from overcurrent protection, four from grounding and bonding, eight from wiring methods, four from electrical equipment, four from motors, HVAC equipment, generators and transformers, two from equipment over 600 volts, three from hazardous locations, two from special occupancies, three from special equipment, three from emergency and standby systems, two from special conditions, one from communication systems, and approximately six questions involving general trade knowledge and theory.

The Washington Codes section includes approximately 20 questions involving RCW Chapter 19.28 and WAC Chapter 296-46B. Master candidates should understand specialty scope, certification, contractor responsibilities, assignments, examinations, permits, inspections, supervision requirements, and other Washington-specific electrical regulations.

Open Book Test

The Washington Nonresidential Maintenance Master Electrician examination is an open book test. Approved original copyrighted reference materials may be used during testing. Candidates may also use printed copies of Washington electrical laws and rules when prepared according to examination requirements.

The 2020 National Electrical Code may contain highlighting, underlining, and permanent index tabs. Removable tabs, sticky notes, repositionable notes, and handwritten notes are not permitted. References may not be written in.

Printed copies of RCW Chapter 19.28 and WAC Chapter 296-46B may be used when placed in a binder as required by the examination rules.

A silent, nonprinting, nonprogrammable calculator may also be used. Candidates should practice calculations involving voltage, current, power, conductor sizing, overcurrent protection, motors, and other general electrical theory subjects that may appear on the examination.

Open-book testing rewards candidates who know where information is located. With approximately 54 NEC & Theory questions in three hours, searching from the beginning of the book for every answer can consume valuable time. Practice using the NEC index, article organization, tables, definitions, exceptions, and cross-references before examination day.

Licensing Steps

Washington Nonresidential Maintenance Master Electrician certification is administered through the Washington State Department of Labor & Industries. A candidate pursuing a specialty Master Electrician credential must first hold the corresponding Washington specialty electrician certificate.

1. Obtain the 07 Nonresidential Maintenance Electrician certificate. The specialty Master Electrician pathway begins with certification in the corresponding specialty.
2. Hold the specialty electrician certificate for at least two years. Washington requires specialty Master Electrician applicants to have been certified by L&I in the applicable specialty for at least two years.
3. Apply for the Master Electrician examination. Submit the required Master Electrician examination application through Washington Labor & Industries.
4. Receive L&I approval. Labor & Industries reviews the application to confirm that the candidate meets the applicable eligibility requirements.
5. Prepare for NEC & Theory. Study the 2020 NEC, electrical theory, and the maintenance-related subject areas included in the examination outline.
6. Prepare for Washington Codes. Review RCW Chapter 19.28 and WAC Chapter 296-46B, including specialty-scope and Master Electrician requirements.
7. Schedule the examination with PSI. After approval, use the instructions provided with the eligibility notice to schedule testing.
8. Pass each required examination section. Washington requires a score of at least 70% on each section.
9. Complete certification requirements. After successfully completing the examination, follow Washington Labor & Industries procedures for issuance of the specialty Master Electrician certificate.

State Requirements

Washington identifies Nonresidential Maintenance as electrical specialty classification 07. To qualify for the specialty Master Electrician examination, a candidate must have held an active Washington specialty electrician certificate in classification 07 for at least two years.

The underlying 07 Nonresidential Maintenance Electrician pathway requires 4,000 hours of qualifying work experience. Trainees performing work in this specialty must be supervised by an electrician certified to perform the work or by a general journey level electrician.

For 4,000-hour specialty classifications, Washington requires trainees to be supervised at least 75 percent of the time. Candidates must also complete 48 hours of qualifying basic classroom instruction as part of the applicable examination and trainee education requirements.

The scope of the 07 Nonresidential Maintenance specialty is limited to the maintenance, repair, and replacement of like-in-kind existing electrical equipment and conductors. The classification is intended for work on existing nonresidential electrical systems rather than unrestricted new electrical installation.

The specialty includes the installation and connection of temporary conductors and equipment for load-testing purposes when the voltage does not exceed 600 volts.

When existing electrical equipment is replaced with equipment having a lower ampere rating, and the ampacity of the existing conductors is not modified, the 07 specialty may replace the overcurrent or overload protective device with one having a lower ampere rating when required by the nameplate rating of the replacement equipment.

The 07 specialty also includes work falling within certain narrower maintenance classifications established by Washington rules. This broader maintenance authority means Master candidates should understand the requirements associated with maintenance activities involving lighting, residential maintenance functions permitted within the specialty structure, restricted maintenance work, appliance repair, and equipment repair where incorporated into the 07 scope.

The classification does not turn a maintenance electrician into an unrestricted general electrician. New installations, system expansions, and modifications that go beyond the specialty's authorized maintenance, repair, replacement, and related work may require a different electrical classification.

A Washington Master Electrician may work with the tools of the trade within the scope of the certification. A Master Electrician may also be assigned as the designated master for an electrical contractor when the contractor classification and assignment requirements are satisfied.

When assigned to an electrical contractor, the Master Electrician accepts responsibility for helping ensure that the contractor complies with applicable Washington electrical laws and rules. Washington also requires a Master Electrician to notify L&I of changes in assignment status within the required period.

Reference Books

• Revised Code of Washington (RCW) Chapter 19.28
  This reference contains Washington statutes governing Master Electricians, electricians, contractors, certification, electrical installations, enforcement, responsibilities, and other electrical licensing requirements.
• Washington Administrative Code (WAC) Chapter 296-46B
  This reference contains Washington rules governing specialty classifications, examinations, supervision, certification, contractors, permits, inspections, continuing education, and the specific scope of the 07 Nonresidential Maintenance specialty.
• National Electrical Code, NEC, 2020 Edition
  The NEC provides technical requirements for services, wiring and protection, grounding and bonding, overcurrent protection, wiring methods, motors, electrical equipment, hazardous locations, special occupancies, emergency systems, communications, and other systems encountered in nonresidential maintenance work.

Exam Room Approved Books

• National Electrical Code, NEC, 2020 Edition
  The 2020 NEC may be used during the examination. Permanent index tabs, highlighting, and underlining are permitted under examination rules. Removable notes, sticky tabs, and handwritten material are prohibited.
• Revised Code of Washington (RCW) Chapter 19.28
  Printed copies of Washington electrical law may be brought into the examination when prepared according to the applicable testing requirements.
• Washington Administrative Code (WAC) Chapter 296-46B
  Printed copies of Washington electrical rules may be used during testing and should be placed in an appropriate binder as required.

Studying from the same references you plan to use during testing helps build familiarity with article numbers, terminology, tables, specialty rules, and commonly referenced sections.

Test Information and Study Materials

Wiring Methods: Wiring methods represent one of the largest content areas on the 07 Master examination. Review raceways, cables, boxes, fittings, conductor protection, supports, equipment connections, flexible wiring methods, wet and damp locations, and maintenance of existing wiring systems.

Grounding and Bonding: Study equipment grounding conductors, bonding, grounding electrode systems, service grounding, separately derived systems, enclosures, raceways, and maintenance-related grounding issues.

Overcurrent Protection: Review breakers, fuses, conductor protection, equipment protection, replacement equipment ratings, overload protection, and the relationship between existing conductors and replacement protective devices.

Services: Candidates should understand service conductors, service equipment, disconnecting means, service grounding, and maintenance considerations for existing service equipment.

Motors, HVAC, Generators, and Transformers: Study motor circuits, controllers, overload protection, disconnecting means, HVAC equipment, generators, transformers, and maintenance requirements affecting these systems.

Equipment Over 600 Volts: The examination includes questions involving equipment rated over 600 volts. Review applicable NEC concepts even though temporary load-testing authority under the 07 scope is limited to 600 volts.

Hazardous Locations and Special Occupancies: Study classified locations, special wiring methods, occupancy-specific requirements, and maintenance considerations where specialized electrical rules apply.

Emergency and Standby Systems: Review emergency systems, legally required standby systems, optional standby systems, transfer equipment, wiring separation, and maintenance-related requirements.

General Trade Knowledge and Theory: Practice Ohm's law, voltage, current, resistance, power, conductor calculations, motor calculations, circuit relationships, and general electrical troubleshooting concepts.

Washington Specialty Scope: Know the difference between maintenance, repair, like-in-kind replacement, and new installation. Understanding that boundary is essential for the 07 classification.

How 1 Exam Prep Helps You Reach Your Goal

1 Exam Prep helps Washington Nonresidential Maintenance Master Electrician candidates organize preparation around the three core references included in this package: the 2020 National Electrical Code, RCW Chapter 19.28, and WAC Chapter 296-46B.

The package supports trade-focused review of wiring methods, services, grounding and bonding, overcurrent protection, motors, electrical equipment, hazardous locations, emergency systems, electrical theory, maintenance scope, and Washington electrical laws and rules.

1 Exam Prep encourages practice-oriented preparation for the open-book examination. Candidates can strengthen reference-navigation skills by identifying the subject of each question, selecting the correct reference, locating the controlling section, and applying the requirement efficiently.

Experienced maintenance electricians often bring extensive practical knowledge to the Master examination. Structured study helps connect that field experience with precise NEC language and Washington regulatory requirements.

Washington-specific preparation is particularly important for classification 07 because the specialty is defined by what type of work may be performed on existing nonresidential electrical systems. Candidates should understand the difference between permitted maintenance and replacement work and electrical activities requiring broader authority.

The goal is to combine practical maintenance experience with organized code study, Washington regulatory knowledge, efficient reference navigation, and confidence-building preparation. This Washington Nonresidential Maintenance Master Electrician Book Package provides the core materials needed to support that study structure.

Frequently Asked Questions

What is the official Washington classification for Nonresidential Maintenance?

Washington identifies Nonresidential Maintenance as electrical specialty classification 07.

What books are included in this package?

This package includes RCW Chapter 19.28, WAC Chapter 296-46B, and the 2020 National Electrical Code.

Is the Washington 07 Master Electrician exam open book?

Yes. Washington electrical examinations are open book under the applicable examination rules.

How many questions are on the 07 Master Electrician examination?

The published examination outline lists approximately 54 NEC & Theory questions and 20 Washington Codes questions, for approximately 74 questions total.

How much testing time is allowed?

The NEC & Theory section allows approximately 3 hours, and the Washington Codes section allows approximately 1 hour.

What score is required to pass?

Washington requires a score of at least 70% on each required examination section.

How long must I hold the 07 Electrician certificate before taking the Master exam?

A specialty Master Electrician candidate must have been certified by Washington Labor & Industries in the applicable specialty for at least two years.

How much experience is required for the underlying 07 Electrician certification?

The Washington 07 Nonresidential Maintenance specialty requires 4,000 hours of qualifying work experience.

What supervision applies to 07 trainees?

Trainees working in the 4,000-hour Nonresidential Maintenance specialty must work under an appropriately certified electrician and be supervised at least 75 percent of the time.

Is classroom instruction required?

Yes. The 4,000-hour specialty pathway includes 48 hours of qualifying basic classroom instruction.

What work can a 07 Nonresidential Maintenance Electrician perform?

The specialty is primarily limited to maintenance, repair, and like-in-kind replacement of existing electrical equipment and conductors in nonresidential settings, along with additional work specifically included by Washington rules.

Can the 07 specialty install temporary equipment for load testing?

Yes. The specialty includes temporary conductors and equipment used for load testing when the voltage does not exceed 600 volts.

Does a 07 Master Electrician have unrestricted electrical authority?

No. It is a specialty Master Electrician certificate, so electrical work must remain within the authorized 07 scope unless the person holds another certification providing broader authority.

Can I use the 2020 NEC during the examination?

Yes. The 2020 NEC may be used for the Washington electrical examination program covered by this package.

Can I bring RCW 19.28 and WAC 296-46B into the examination?

Yes. Printed copies of both Washington references may be used when prepared according to the applicable examination requirements.

Who administers the Washington Nonresidential Maintenance Master Electrician examination?

Washington electrical examinations are administered through PSI after the applicable eligibility review and approval through Washington Labor & Industries.

What should I focus on while studying?

Focus on wiring methods, grounding and bonding, overcurrent protection, services, motors, electrical equipment, hazardous locations, special occupancies, emergency systems, electrical theory, 07 specialty scope, and Washington electrical laws and rules.