Washington Nonresidential Maintenance Restricted Master Electrician 07C Book Package

Prepare for the Washington Nonresidential Maintenance Restricted Master Electrician examination with a focused reference package built around the electrical code, Washington electrical law, and state administrative rules used for the 07C Restricted 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 identifies this specialty as 07C Restricted Nonresidential Maintenance. The classification is designed for defined maintenance, repair, and like-in-kind replacement of existing electrical utilization equipment. It includes specific restrictions involving voltage, amperage, lighting circuits, branch circuits, circuit breakers, classified locations, supply whips, external conductors, raceways, and conduit systems.

The Washington 07C Master Electrician examination combines National Electrical Code knowledge, electrical theory, and Washington electrical laws and rules. Candidates should be prepared for questions involving general NEC requirements, wiring and protection, overcurrent protection, grounding and bonding, wiring methods, electrical equipment, motors and HVAC equipment, hazardous locations, special occupancies, special equipment, emergency and standby systems, special conditions, communications systems, and Washington-specific specialty requirements.

Washington electrical examinations are open book. Approved references may be used during testing, so candidates should prepare by learning how to navigate the NEC, RCW, and WAC efficiently. Open-book testing is most useful when a candidate can quickly determine which reference controls the question and locate the applicable requirement without searching through unrelated material.

The 07C specialty also incorporates work defined for the 07A Nonresidential Lighting Maintenance & Lighting Retrofit specialty and the 07B Residential Maintenance specialty. Because of that broader incorporated maintenance scope, candidates should understand the work and limitations of those classifications in addition to the specific 07C rules.

This package combines the three primary references needed for organized study. The NEC provides national technical requirements, RCW Chapter 19.28 establishes Washington electrical law, and WAC Chapter 296-46B contains the detailed specialty, certification, supervision, contractor, examination, permit, inspection, and installation rules applicable to Washington electrical work.

What You Get

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

Exam Details

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

• NEC & Theory: Approximately 40 questions
• Time Allowed for NEC & Theory: 2 hours
• Washington Codes: Approximately 20 questions
• Time Allowed for Washington Codes: 1 hour
• Total Questions: Approximately 60 questions across both sections
• Total Testing Time: Approximately 3 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 07C Master Electrician examination includes approximately two questions from NEC Article 90, two from NEC Articles 100 through 110, one involving wiring and protection, four involving overcurrent protection, four involving grounding and bonding, three involving wiring methods, three involving electrical equipment, four involving motors, HVAC equipment, generators and transformers, one involving hazardous locations, three involving special occupancies, two involving special equipment, one involving emergency and standby systems, two involving special conditions, one involving communications systems, and approximately seven questions involving general trade knowledge and electrical theory.

The Washington Codes section contains approximately 20 questions involving Washington laws and administrative rules. Candidates should study Master Electrician requirements, specialty scope, contractor responsibilities, examinations, certification, permits, inspections, and the specific restrictions that apply to 07C work.

Open Book Test

The Washington Nonresidential Maintenance Restricted Master Electrician examination is an open book test. Washington Labor & Industries permits approved reference materials in the testing center under established examination rules.

The 2020 National Electrical Code may be used during testing. Permanent index tabs are acceptable. Removable tabs, sticky notes, repositionable notes, and handwritten notes are prohibited. Original copyrighted reference materials may contain highlighting, underlining, and permanent index tabs when they otherwise comply with examination requirements.

Printed copies of RCW Chapter 19.28 and WAC Chapter 296-46B may also be used. Printed copies of Washington electrical laws and rules should be placed in a three-ring binder as required by the examination rules.

Because the NEC & Theory section contains approximately 40 questions in two hours, candidates should practice efficient reference navigation. Overcurrent protection, grounding and bonding, motors and HVAC equipment, special occupancies, wiring methods, and electrical equipment are important study areas.

Washington-specific navigation is equally important. The 07C classification has detailed restrictions, so candidates should know where to find the rules governing voltage and amperage limits, lighting work, circuit-breaker restrictions, supply whips, classified locations, and incorporated 07A and 07B work.

Licensing Steps

Washington Restricted Nonresidential Maintenance Master Electrician certification is administered through the Washington State Department of Labor & Industries. Specialty Master Electrician candidates must first qualify through the corresponding specialty electrician pathway.

1. Obtain the 07C Restricted Nonresidential Maintenance Electrician certificate. The specialty Master Electrician pathway begins with the corresponding specialty electrician certification.
2. Meet the specialty Master Electrician qualification requirements. Washington reviews the candidate's existing specialty certification and eligibility before approving the Master examination.
3. Submit the Master Electrician examination application. Apply through Washington Labor & Industries using the applicable Master Electrician process.
4. Receive examination approval. L&I reviews the application and sends scheduling information after confirming eligibility.
5. Prepare for NEC & Theory. Study the 2020 NEC with particular attention to the technical subjects identified in the 07C examination outline.
6. Prepare for Washington Codes. Review RCW Chapter 19.28 and WAC Chapter 296-46B, especially the 07C scope and Master Electrician responsibilities.
7. Schedule with PSI. Use the eligibility information provided after L&I approval.
8. Take both required examination sections. Complete NEC & Theory and Washington Codes.
9. Pass each required section. Washington requires a score of at least 70% on every required examination section.
10. Complete the certification process. Follow Washington Labor & Industries procedures for issuance of the specialty Master Electrician certificate.

State Requirements

Washington identifies the classification as 07C Restricted Nonresidential Maintenance. The underlying electrician pathway requires 2,000 hours of qualifying work experience for full 07C certification.

A trainee may qualify to take the 07C specialty electrician examination after completing at least 1,000 hours of qualifying work experience. Trainees in the 2,000-hour specialty group must be supervised by an electrician certified to perform the work or by a general journey level electrician and must remain under 100 percent supervision until passing the examination.

The 07C specialty may maintain, repair, or replace like-in-kind existing electrical utilization equipment. It may also perform qualifying permit-exempt work under Washington rules, except for the replacement or repair of circuit breakers.

The specialty is limited to equipment and circuits of no more than 277 volts and 20 amperes for lighting branch circuits and no more than 250 volts and 60 amperes for other circuits.

Replacement of luminaires under 07C is limited to in-place replacement required because an existing luminaire has failed to operate. Washington provides an additional rule for luminaires installed in suspended lay-in tile ceilings.

A luminaire in a suspended lay-in tile ceiling may be relocated when the original field-installed luminaire supply whip is not extended or moved to a new supply point. When a manufactured wiring assembly supplies power to the luminaire, relocation may be permitted up to eight feet when the manufactured wiring assembly circuiting is not changed.

The 07C specialty may disconnect and reconnect low-voltage control wiring and line-voltage supply whips not more than six feet in length, provided the characteristics of the branch circuit are not modified.

For purposes of this specialty, electrical equipment does not include electrical conductors, raceway systems, or conduit systems located externally to the equipment or supply whip. This distinction limits the extent of wiring changes that may be performed under 07C.

The 07C classification may also perform the work defined under Washington's 07A Nonresidential Lighting Maintenance & Lighting Retrofit and 07B Residential Maintenance specialties. Candidates should therefore understand the restrictions and permitted activities within those classifications as well as the specific 07C provisions.

The specialty cannot perform electrical work governed by the NEC articles covering classified hazardous locations, including the applicable requirements of Articles 500 through 516 identified by Washington rule. Work in those classified-location categories requires other appropriate authority.

The 07C specialty also cannot perform plumbing work regulated under Washington plumbing law. Electrical certification does not replace any plumbing credential required for plumbing work.

A specialty Master Electrician may work with the tools of the trade within the scope of the certification and may also be assigned to an electrical contractor when the applicable contractor classification and assignment requirements are met. When assigned, the Master Electrician accepts responsibility for helping ensure that the contractor complies with Washington electrical laws and rules.

Reference Books

• Revised Code of Washington (RCW) Chapter 19.28
  This reference contains Washington statutes governing electricians, Master Electricians, contractors, certification, electrical installations, enforcement, and legal responsibilities within the state's electrical licensing system.
• Washington Administrative Code (WAC) Chapter 296-46B
  This reference contains Washington rules governing specialty classifications, experience, supervision, examinations, Master Electrician certification, contractors, permits, inspections, and the detailed 07C Restricted Nonresidential Maintenance scope.
• National Electrical Code, NEC, 2020 Edition
  The NEC provides technical requirements covering wiring and protection, overcurrent protection, grounding and bonding, wiring methods, electrical equipment, motors, HVAC equipment, hazardous locations, special occupancies, emergency systems, special conditions, and communications systems.

Exam Room Approved Books

• National Electrical Code, NEC, 2020 Edition
  The 2020 NEC is permitted during Washington electrical examinations. Permanent index tabs, highlighting, and underlining are allowed under applicable testing rules, while handwritten notes, removable tabs, and sticky notes are prohibited.
• Revised Code of Washington (RCW) Chapter 19.28
  Printed copies of Washington electrical law may be used during the examination when prepared according to Labor & Industries testing requirements.
• Washington Administrative Code (WAC) Chapter 296-46B
  Printed copies of Washington electrical rules may be used during testing when prepared according to the applicable examination requirements.

Preparing with these same references can help candidates become familiar with article numbers, definitions, specialty provisions, tables, exceptions, and the organization of Washington electrical rules before examination day.

Test Information and Study Materials

Overcurrent Protection: Review circuit breakers, fuses, conductor protection, equipment ratings, branch-circuit protection, and maintenance-related limitations. Remember that the 07C specialty specifically excludes circuit-breaker replacement or repair from its permit-exempt maintenance authority.

Grounding and Bonding: Study equipment grounding conductors, bonding, grounding continuity, enclosures, raceways, and grounding requirements associated with utilization equipment and maintenance work.

Wiring Methods: Review raceways, cables, flexible wiring methods, boxes, fittings, supports, conductor protection, and equipment connections. Technical familiarity is important even though 07C limits external conductor and raceway work.

Electrical Equipment: Study utilization equipment, flexible cords, equipment connections, switches, disconnecting means, and electrical components commonly encountered during commercial maintenance.

Motors and HVAC Equipment: Review motors, controllers, overload protection, disconnecting means, HVAC equipment, generators, transformers, and maintenance requirements involving motor-driven equipment.

Special Occupancies: The 07C Master examination includes special-occupancy content. Review NEC requirements that apply to commercial, institutional, assembly, agricultural, and other specialized occupancies addressed within the applicable articles.

Special Equipment: Study electrical requirements for specialized equipment that may appear in nonresidential facilities, including equipment covered in NEC Articles 600 through 695.

Emergency and Standby Systems: Review emergency systems, legally required standby systems, optional standby systems, transfer equipment, and maintenance considerations.

Hazardous Locations: The examination includes hazardous-location knowledge even though the 07C specialty is prohibited from performing the classified-location work specifically identified by Washington rule. Candidates should understand both the NEC concepts and the Washington scope restriction.

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

07C Specialty Limits: Memorize the key boundaries: 277 volts and 20 amperes for lighting branch circuits, 250 volts and 60 amperes for other circuits, six-foot supply-whip provisions, the restriction on circuit-breaker replacement or repair, and the limitations on external conductors and raceways.

07A and 07B Scope: Because Washington permits 07C electricians to perform the work of these two specialties, candidates should understand nonresidential lighting maintenance, lighting retrofit work, and residential maintenance requirements as well.

How 1 Exam Prep Helps You Reach Your Goal

1 Exam Prep helps Washington Restricted 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 overcurrent protection, grounding and bonding, wiring methods, electrical equipment, motors, HVAC equipment, special occupancies, emergency systems, electrical theory, specialty restrictions, 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 topic of each question, selecting the appropriate reference, locating the controlling provision, and applying it efficiently.

Experienced maintenance electricians often bring strong practical troubleshooting and repair knowledge to the examination. Structured study helps connect that field knowledge with the exact NEC and Washington language governing the work.

Washington-specific preparation is especially important for 07C because the specialty includes both its own restrictions and incorporated work from 07A and 07B. Candidates should understand what is permitted, what is prohibited, and how the different maintenance classifications fit together.

The goal is to combine practical nonresidential maintenance experience with organized code study, Washington regulatory knowledge, reference-navigation practice, and confidence-building preparation. This Washington Nonresidential Maintenance Restricted Master Electrician 07C Book Package provides the core materials needed to support that study process.

Frequently Asked Questions

What is the official Washington classification for this specialty?

Washington identifies it as 07C Restricted Nonresidential Maintenance.

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 07C Master Electrician exam open book?

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

How many questions are on the 07C Master Electrician examination?

The published examination outline lists approximately 40 NEC & Theory questions and 20 Washington Codes questions, for approximately 60 questions total.

How much testing time is allowed?

The NEC & Theory section allows approximately 2 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 much experience is required for the underlying 07C Electrician certification?

Full 07C Restricted Nonresidential Maintenance Electrician certification requires 2,000 hours of qualifying work experience.

When can a 07C trainee become eligible for the specialty exam?

A candidate may become eligible for the 07C specialty electrician examination after completing at least 1,000 hours of qualifying work experience.

What supervision applies before passing the 07C electrician exam?

A trainee in this 2,000-hour specialty pathway must remain under 100 percent supervision until successfully passing the examination.

What voltage and amperage limits apply to 07C work?

The specialty is limited to 277 volts and 20 amperes for lighting branch circuits and 250 volts and 60 amperes for other circuits.

Can a 07C electrician repair or replace circuit breakers?

The 07C scope excludes circuit-breaker repair and replacement from the permit-exempt maintenance work authorized for the specialty.

Can a 07C electrician relocate a luminaire?

Washington allows limited relocation of luminaires in suspended lay-in tile ceilings when the specific supply-whip or manufactured-wiring-assembly conditions are satisfied.

Can a 07C electrician perform 07A and 07B work?

Yes. Washington rules include the work defined for 07A Nonresidential Lighting Maintenance & Lighting Retrofit and 07B Residential Maintenance within the 07C scope.

Can a 07C electrician work in classified hazardous locations?

No. Washington specifically excludes the classified-location electrical work identified in the applicable NEC Articles 500 through 516 from the 07C specialty scope.

Can I use the 2020 NEC during the examination?

Yes. The Washington electrical examination program covered by this package permits the 2020 National Electrical Code.

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

Yes. Printed copies of both Washington electrical references may be used when prepared according to Labor & Industries examination requirements.

Who administers the Washington 07C Master Electrician examination?

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

What should I focus on while studying?

Focus on overcurrent protection, grounding and bonding, wiring methods, electrical equipment, motors and HVAC equipment, special occupancies, electrical theory, 07C specialty restrictions, incorporated 07A and 07B work, and Washington electrical laws and rules.