Washington Residential Maintenance Electrician 07B Book Package

Prepare for the Washington Residential Maintenance Electrician examination with a focused reference package built around the electrical code, Washington electrical law, and state administrative rules used for the 07B Residential 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 07B Residential Maintenance. The classification is designed for defined maintenance, repair, and like-in-kind replacement work involving existing electrical utilization equipment in qualifying residential occupancies. The specialty has specific limits involving voltage, amperage, phase, equipment, supply whips, conductors, raceways, and the types of residential properties where the work may be performed.

The Washington 07B Electrician examination tests National Electrical Code knowledge, basic 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, special equipment, emergency and standby systems, and Washington-specific licensing and specialty requirements.

Washington electrical examinations are open book. Approved reference materials may be used during testing, making effective reference navigation an important part of preparation. Candidates should become comfortable deciding whether an examination question is controlled by the NEC, RCW Chapter 19.28, or WAC Chapter 296-46B and then locating the applicable provision efficiently.

The 07B specialty is narrower than a general electrical classification. It does not provide unrestricted authority to install new branch circuits, services, feeders, raceways, or general electrical wiring. Instead, it focuses on maintenance and like-in-kind replacement of qualifying existing equipment within the scope established by Washington rules.

This package combines the three core references needed for organized preparation. The NEC provides national technical requirements, RCW Chapter 19.28 establishes Washington electrical law, and WAC Chapter 296-46B contains the detailed rules governing specialty scope, trainee supervision, work experience, examinations, certification, permits, inspections, contractors, and electrical installations.

What You Get

• Revised Code of Washington (RCW) Chapter 19.28
  Washington electrical law covering electricians, electrical trainees, contractors, electrical installations, certification, 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 07B Residential Maintenance specialty and its authorized work.
• 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 wiring and protection, overcurrent protection, grounding and bonding, wiring methods, electrical equipment, motors, HVAC equipment, special equipment, emergency systems, and other residential electrical subjects.

Exam Details

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

• NEC & Theory: Approximately 20 questions
• Time Allowed for NEC & Theory: 1 hour
• Washington Codes: Approximately 17 questions
• Time Allowed for Washington Codes: 1 hour
• Total Questions: Approximately 37 questions across both sections
• Total Testing Time: Approximately 2 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 includes approximately one question from NEC Article 90, one from NEC Articles 100 through 110, two involving wiring and protection, two involving overcurrent protection, two involving grounding and bonding, two involving wiring methods, two involving electrical equipment, one involving motors, HVAC equipment, generators and transformers, two involving special equipment, two involving emergency and standby systems, and approximately three questions involving general trade knowledge and electrical theory.

The Washington Codes section contains approximately 17 questions involving Washington electrical laws and administrative rules. Candidates should prepare for specialty scope, work-experience requirements, trainee supervision, certification, examinations, contractors, permits, inspections, and other provisions contained in RCW Chapter 19.28 and WAC Chapter 296-46B.

Open Book Test

The Washington Residential Maintenance 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, while removable tabs, sticky 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 brought into the examination. Printed Washington electrical laws and rules should be hole-punched and placed in a three-ring binder.

Because the NEC & Theory section provides approximately one hour for 20 questions, candidates should practice finding relevant provisions quickly. Familiarity with overcurrent protection, grounding and bonding, wiring methods, utilization equipment, motors, HVAC equipment, special equipment, emergency systems, and basic theory can make open-book testing more efficient.

The Washington Codes section requires the same kind of preparation. Candidates should be able to locate the 07B specialty definition, experience requirements, supervision rules, examination provisions, and certification requirements without spending excessive time searching.

Licensing Steps

Washington Residential Maintenance Electrician certification is administered through the Washington State Department of Labor & Industries. The 07B specialty is one of Washington's 2,000-hour specialty electrician pathways.

1. Begin accumulating qualifying 07B experience. Work must fall within the Residential Maintenance specialty and be performed under appropriate supervision.
2. Work under an appropriately certified electrician. A trainee must be supervised by an electrician certified to perform the work or by a general journey level electrician.
3. Accumulate at least 720 hours for examination eligibility. Washington permits a 07B trainee to qualify for the specialty examination after completing the minimum required supervised work experience.
4. Remain under 100% supervision until passing the examination. Washington requires trainees in this specialty pathway to remain fully supervised until the applicable examination is successfully completed.
5. Document qualifying work experience. Experience must be properly recorded and verified according to Washington Labor & Industries requirements.
6. Apply for examination approval. Submit the required electrician examination application and supporting documentation to L&I.
7. Receive L&I approval before scheduling. Electrician candidates cannot schedule the specialty examination until Washington Labor & Industries approves the application.
8. Prepare using the approved references. Study the 2020 NEC, RCW Chapter 19.28, and WAC Chapter 296-46B.
9. Schedule and take the PSI examination. Complete both NEC & Theory and Washington Codes sections.
10. Pass each required examination section. A minimum score of 70% is required on each section.
11. Complete the full 2,000-hour experience requirement. Passing the examination does not eliminate the remaining experience required for full certification.
12. Complete the certification process. Follow Washington Labor & Industries requirements for issuance of the 07B Residential Maintenance Electrician certificate.

State Requirements

Washington identifies Residential Maintenance as electrical specialty classification 07B. Full certification requires 2,000 hours of qualifying work experience.

A trainee may become eligible to take the 07B specialty examination after completing at least 720 hours of qualifying supervised experience. Until the specialty examination is successfully completed, the trainee must work under 100 percent supervision.

After successfully passing the examination, a trainee may qualify for a modified supervision training certificate under Washington rules while completing the balance of the 2,000 hours required for full certification. The applicable modified supervision certificate is subject to Washington's eligibility and time-limit requirements.

The 07B specialty is limited to residential dwellings as defined by Washington rules, multistory dwelling structures with no commercial facilities, and the interior of dwelling units in multistory structures that include commercial facilities.

The specialty may maintain, repair, or replace like-in-kind existing electrical utilization equipment. It may also perform electrical work that is exempt from permit requirements under the applicable Washington rules.

The specialty is limited to equipment and circuits with a maximum rating of 250 volts, 60 amperes, and single phase. These limits are central to the 07B classification and are important study points for the Washington Codes section.

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

For purposes of this specialty, electrical equipment does not include electrical conductors, raceways, or conduit systems located externally to the equipment or supply whip. This restriction helps define the boundary between authorized maintenance work and general electrical installation.

The specialty does not provide unrestricted authority to install new branch circuits, feeders, services, raceways, or general wiring systems. Work that goes beyond maintenance, repair, like-in-kind replacement, and the specifically authorized supply-whip activities may require a different electrical certification.

Washington also specifies that the Residential Maintenance specialty cannot perform plumbing work regulated under Washington plumbing law. Electrical certification does not replace any separate plumbing credential that may be required.

Reference Books

• Revised Code of Washington (RCW) Chapter 19.28
  This reference contains Washington electrical statutes governing electricians, electrical trainees, contractors, certification, electrical installations, enforcement, and related legal responsibilities within the state's electrical licensing system.
• Washington Administrative Code (WAC) Chapter 296-46B
  This reference contains Washington rules governing specialty classifications, work experience, supervision, examinations, permits, inspections, certification, contractors, and the detailed scope of the 07B Residential Maintenance specialty.
• National Electrical Code, NEC, 2020 Edition
  The NEC provides technical requirements for wiring and protection, grounding and bonding, overcurrent protection, wiring methods, electrical equipment, motors, HVAC equipment, special equipment, emergency systems, and other subjects relevant to residential maintenance electrical work.

Candidates should study these three references as an integrated set. Technical questions may point toward the NEC, while specialty authority, supervision, experience, and certification questions are generally addressed through Washington laws and rules.

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 the examination 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.

Using the same references during preparation and on examination day can help candidates become familiar with article numbers, definitions, tables, specialty rules, and commonly referenced provisions.

Test Information and Study Materials

General NEC Requirements: Review definitions, equipment approval, listing and labeling requirements, installation and use rules, electrical connections, and other foundational provisions that can apply to residential maintenance work.

Wiring and Protection: Study branch circuits, conductor requirements, conductor identification, wiring protection, and related requirements that affect residential utilization equipment.

Overcurrent Protection: Review breakers, fuses, equipment protection, conductor protection, branch-circuit ratings, and requirements affecting existing residential equipment.

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

Wiring Methods: Review cables, raceways, boxes, fittings, flexible wiring methods, supports, and equipment connections. Technical familiarity with these methods is useful even though the 07B specialty limits work on conductors and raceways external to the equipment or supply whip.

Electrical Equipment: Study utilization equipment, appliances, switches, receptacles, flexible cords, equipment connections, and other electrical components commonly encountered during residential maintenance.

Motors and HVAC Equipment: Review motors, controllers, overload protection, disconnecting means, heating and cooling equipment, and equipment connections relevant to residential maintenance work.

Special Equipment: Study specialized electrical equipment that may appear in residential settings and the NEC requirements that apply to those installations.

Emergency and Standby Systems: Review generators, optional standby systems, transfer equipment, and related backup-power requirements that may appear on the examination.

General Trade Knowledge and Theory: Practice voltage, current, resistance, power, Ohm's law, series and parallel circuits, electrical calculations, and basic troubleshooting principles.

Washington 07B Scope: Know the maximum 250-volt, 60-ampere, single-phase limits, the six-foot supply-whip provision, occupancy restrictions, and the definition of electrical equipment for purposes of the specialty.

Experience and Supervision Rules: Review the 720-hour examination eligibility requirement, the 2,000-hour full certification requirement, and the supervision rules that apply before and after successfully completing the examination.

A practical study method is to classify each practice question before beginning a lookup. Decide whether it is most likely an NEC question, a Washington law question, or a Washington administrative-rule question. Then locate the applicable provision and confirm whether a specialty limitation affects the answer.

How 1 Exam Prep Helps You Reach Your Goal

1 Exam Prep helps Washington Residential Maintenance 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 and protection, overcurrent protection, grounding and bonding, wiring methods, electrical equipment, motors, HVAC systems, special equipment, emergency systems, electrical theory, Residential Maintenance specialty limits, and Washington electrical requirements.

1 Exam Prep encourages practice-oriented preparation for the open-book examination. Candidates can strengthen reference-navigation skills by reading a question, identifying the likely reference, locating the controlling provision, and applying the requirement efficiently.

Residential maintenance technicians often bring practical experience with appliances, HVAC equipment, utilization equipment, supply whips, troubleshooting, and like-in-kind replacement. Structured study helps connect that field knowledge with the exact NEC and Washington requirements used on the examination.

Washington-specific preparation is especially important for 07B because the specialty has clearly defined limits involving occupancy, voltage, amperage, phase, supply whips, conductors, raceways, experience, and supervision. Understanding these limits can help candidates prepare for both the Washington Codes section and future specialty work.

The goal is to combine practical residential maintenance experience with organized code study, stronger regulatory knowledge, effective reference navigation, and confidence-building preparation. This Washington Residential Maintenance Electrician 07B Book Package provides the core reference materials needed to support that study process.

Frequently Asked Questions

What is the official Washington classification for Residential Maintenance?

Washington identifies Residential Maintenance as electrical specialty classification 07B.

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 07B Electrician exam open book?

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

How many questions are on the 07B Electrician examination?

The published examination outline lists approximately 20 NEC & Theory questions and 17 Washington Codes questions, for approximately 37 questions total.

How much testing time is allowed?

The NEC & Theory section allows approximately 1 hour, 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 before taking the 07B exam?

A candidate may become eligible to take the 07B specialty examination after completing at least 720 hours of qualifying supervised work experience.

How much experience is required for full 07B certification?

Full Washington 07B Residential Maintenance Electrician certification requires 2,000 hours of qualifying work experience.

What supervision is required before passing the examination?

A 07B trainee must work under 100 percent supervision until the applicable specialty examination has been successfully completed.

What electrical limits apply to the 07B specialty?

The specialty is limited to equipment and circuits with a maximum rating of 250 volts, 60 amperes, and single phase.

Can a 07B Electrician disconnect and reconnect supply whips?

Yes. The specialty may disconnect and reconnect qualifying low-voltage control and line-voltage supply whips not over six feet in length when the characteristics of the branch circuit or whip are not modified.

Can a 07B Electrician perform unrestricted new electrical wiring?

No. The 07B certificate is a specialty credential and does not provide unrestricted authority for new branch circuits, services, feeders, raceways, or general electrical installations.

Can a 07B Electrician work on external raceways and conductors?

For purposes of this specialty, electrical conductors, raceways, and conduit systems external to the equipment or supply whip are not included within the definition of electrical equipment authorized for Residential Maintenance work.

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 testing requirements.

Who administers the Washington 07B Electrician examination?

Washington electrical examinations are administered through PSI after the electrician candidate receives the applicable examination approval from Washington Labor & Industries.

What should I focus on while studying?

Focus on wiring and protection, overcurrent protection, grounding and bonding, wiring methods, electrical equipment, motors and HVAC equipment, special equipment, emergency systems, electrical theory, 07B specialty limits, experience requirements, supervision rules, and Washington electrical laws and rules.