Washington A-HVAC/R Master Electrician Book Package

Prepare for the Washington HVAC/Refrigeration Master Electrician examination with a focused book package built around the electrical code, Washington electrical law, and administrative rules used for the state's 06A HVAC/Refrigeration 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 HVAC/Refrigeration as electrical specialty classification 06A. The HVAC/R Master Electrician credential is a specialty master certification for experienced electricians who already hold the corresponding Washington specialty electrician certificate and meet the state's master electrician eligibility requirements. The examination requires candidates to apply electrical code requirements to HVAC and refrigeration equipment while also understanding Washington-specific licensing rules, specialty limitations, and electrical regulations.

Washington electrical examinations are open book. Candidates may use approved reference materials during testing, making effective code 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 locating the applicable provision efficiently.

The 06A HVAC/Refrigeration specialty covers defined electrical work associated with HVAC and refrigeration systems. Its scope includes specified telecommunications and Class 2 low-voltage control wiring, line-voltage components located within HVAC/refrigeration equipment, certain disconnecting means and controller components, limited raceway work for physical protection of low-voltage cables, qualifying flexible supply whips, and other work specifically authorized by Washington rules.

The Washington 06A specialty is not generally limited by voltage, phase, or amperage. However, the specialty remains limited to the HVAC/refrigeration scope established by Washington regulations. Master-level certification does not convert the 06A specialty into an unrestricted general electrical certification.

This book package combines the three primary references candidates need for an organized study approach. The NEC provides national electrical installation standards, RCW Chapter 19.28 establishes Washington electrical law, and WAC Chapter 296-46B defines the HVAC/Refrigeration specialty and contains detailed requirements governing certification, contractors, examinations, inspections, permits, and electrical installations.

What You Get

• Revised Code of Washington (RCW) Chapter 19.28
  Washington's electrical law covering electricians, master electricians, electrical contractors, certification, installations, enforcement, responsibilities, and other statutory requirements governing electrical work in the state.
• Washington Administrative Code (WAC) Chapter 296-46B
  Washington's detailed electrical safety, licensing, certification, examination, specialty-scope, contractor, permit, inspection, and installation rules. This reference defines the 06A HVAC/Refrigeration specialty and its authorized electrical work.
• National Electrical Code, NEC, 2020 Edition
  The NEC edition currently identified for Washington electrical examinations. It provides technical requirements for HVAC equipment, motors, controllers, grounding and bonding, overcurrent protection, wiring methods, conductors, electrical equipment, hazardous locations, and related installations.

These references work together during examination preparation. A technical HVAC/R electrical question may be answered through the NEC, while a question involving specialty authority, licensing, master electrician responsibilities, or contractor compliance may require the RCW or WAC.

Exam Details

The Washington 06A HVAC/Refrigeration Master Electrician examination is divided into two required sections: NEC & Theory and Washington Codes.

• NEC & Theory: Approximately 50 questions
• Time Allowed for NEC & Theory: 3 hours
• Washington Codes: Approximately 20 questions
• Time Allowed for Washington Codes: 1 hour
• Total Questions: Approximately 70 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 examination outline includes approximately two questions from NEC Article 90, three from NEC Articles 100 through 110, two from wiring and protection, five from overcurrent protection, five from grounding and bonding, six from wiring methods, four from electrical equipment, eight from motors, HVAC equipment, generators and transformers, one from equipment over 600 volts, one from hazardous locations, one from special equipment, two from special conditions, and approximately ten questions involving general trade knowledge and electrical theory.

The Washington Codes section includes approximately 20 questions involving Washington laws and rules. Candidates should be familiar with specialty scope, certification, master electrician requirements, contractor responsibilities, examination rules, permits, inspections, and other Washington-specific provisions contained in RCW Chapter 19.28 and WAC Chapter 296-46B.

Open Book Test

The Washington HVAC/R 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. Permanent index tabs are permitted. 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 rules.

Printed copies of RCW Chapter 19.28 and WAC Chapter 296-46B may also be brought into the examination. Printed copies of Washington electrical laws and rules must be prepared according to testing requirements, including placement in a three-ring binder.

Because the NEC & Theory section contains approximately 50 questions in three hours, candidates should develop efficient reference-navigation habits before test day. Topics involving motors, HVAC equipment, conductor sizing, grounding and bonding, overcurrent protection, disconnects, and wiring methods should become familiar areas of the NEC.

Washington-specific navigation is equally important. Questions involving the scope of the 06A specialty, master electrician authority, contractor assignments, permits, inspections, or certification requirements may require WAC Chapter 296-46B or RCW Chapter 19.28 instead of the NEC.

Licensing Steps

Washington HVAC/Refrigeration Master Electrician certification is administered through the Washington State Department of Labor & Industries. Candidates follow the specialty master electrician pathway.

1. Hold a Washington 06A HVAC/Refrigeration Electrician certificate. The applicant must first be certified by Labor & Industries in the applicable specialty.
2. Hold the specialty certificate for at least two years. Washington requires specialty Master Electrician applicants to have been certified in the applicable specialty for at least two years.
3. Apply for the Master Electrician examination. Submit the applicable examination application through Washington Labor & Industries.
4. Receive examination approval. L&I reviews the application and verifies that the candidate meets the qualification requirements.
5. Prepare for NEC & Theory and Washington Codes. Study the NEC, RCW, and WAC with emphasis on HVAC/R electrical equipment, motors, controls, and Washington specialty rules.
6. Schedule through PSI. After approval, use the applicable scheduling instructions to arrange the 06A Master Electrician examination.
7. Pass each required examination section. Washington requires a minimum score of 70% on each section.
8. Complete certification requirements. After passing the examination, follow Washington Labor & Industries procedures for issuance of the specialty Master Electrician certificate.

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

When a master electrician is assigned to an electrical contractor, the master electrician accepts responsibility for helping ensure that the contractor complies with Washington electrical laws and rules.

State Requirements

Washington identifies HVAC/Refrigeration as electrical specialty classification 06A. To qualify for the specialty Master Electrician examination, an applicant must have been certified by Washington Labor & Industries in the 06A specialty for at least two years.

The underlying 06A HVAC/Refrigeration Electrician certification requires 4,000 hours of qualifying work experience. Trainees working toward the 06A specialty must work under an appropriately certified specialty electrician or a general journey level electrician and must be supervised at least 75 percent of the time.

Washington also requires candidates in the 4,000-hour specialty pathway to complete 48 hours of basic classroom instruction before they can qualify for examination under the applicable pathway.

The 06A specialty is not limited by voltage, phase, or amperage, but its work must remain within the HVAC/refrigeration scope defined by Washington rules. Washington places additional supervision restrictions on trainees working on HVAC/refrigeration systems containing circuits rated over 600 volts.

The specialty may perform specified telecommunications and Class 2 low-voltage control wiring and component work associated with HVAC/refrigeration systems. Washington rules distinguish between residential occupancies and other occupancies when defining portions of this authority.

The 06A scope also permits installation, repair, replacement, and maintenance of line-voltage components located within HVAC/refrigeration equipment. This can include qualifying equipment accessories installed within and powered from the HVAC/refrigeration system.

The specialty may repair, replace, or maintain internal components of HVAC/refrigeration equipment disconnecting means or controllers when the work meets the limitations established by Washington rules.

Washington also permits the specialty to install short sections of raceway for physical protection of low-voltage cables and to perform qualifying repair, replacement, or maintenance involving line-voltage flexible supply whips when the work falls within the stated restrictions.

The 06A specialty does not provide unrestricted authority to install general line-voltage services, feeders, branch circuits, external controllers, or disconnect switches. WAC 296-46B establishes specific exceptions and limitations that candidates should study carefully.

Reference Books

• Revised Code of Washington (RCW) Chapter 19.28
  This reference contains Washington electrical statutes governing electricians, master electricians, contractors, certification, installations, enforcement, and related legal responsibilities. It supports preparation for the Washington Codes portion of the examination.
• Washington Administrative Code (WAC) Chapter 296-46B
  This reference contains Washington electrical safety requirements, specialty classifications, certification procedures, master electrician rules, contractor requirements, examinations, permits, inspections, and detailed HVAC/Refrigeration specialty provisions.
• National Electrical Code, NEC, 2020 Edition
  The NEC provides technical requirements covering HVAC and refrigeration equipment, motors, motor controllers, overcurrent protection, grounding and bonding, wiring methods, conductors, disconnecting means, electrical equipment, hazardous locations, and other installations relevant to the 06A specialty.

Candidates should use these references as a coordinated study set. The NEC provides the technical installation rule, while the WAC may determine whether the work is permitted under the HVAC/Refrigeration specialty and what additional Washington requirements apply.

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 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 brought into the examination when prepared according to Labor & Industries requirements.
• Washington Administrative Code (WAC) Chapter 296-46B
  Printed copies of Washington electrical rules may be used during testing and should be prepared according to the applicable testing-center requirements.

Studying directly from the same references used in the examination helps candidates build familiarity with the layout, terminology, and location of frequently tested provisions.

Test Information and Study Materials

Motors and HVAC Equipment: This is one of the largest areas on the 06A Master examination. Review motor conductor sizing, overload protection, short-circuit and ground-fault protection, disconnecting means, controllers, air-conditioning equipment, refrigeration equipment, transformers, and related NEC requirements.

Overcurrent Protection: Study circuit breakers, fuses, conductor protection, equipment protection, motor and HVAC circuit requirements, maximum overcurrent protection ratings, and the relationship between equipment nameplate information and circuit protection.

Grounding and Bonding: Review equipment grounding conductors, bonding, grounding electrode systems, service grounding, separately derived systems, equipment enclosures, raceways, and grounding requirements associated with HVAC/R equipment.

Wiring Methods: Study cables, raceways, boxes, fittings, flexible wiring methods, wet and damp locations, equipment connections, conductor protection, supports, and installation requirements commonly encountered around HVAC and refrigeration systems.

Electrical Equipment: Review disconnecting means, controllers, flexible cords and cables, transformers, utilization equipment, equipment wiring, and other provisions that can apply to heating, cooling, and refrigeration installations.

Equipment Over 600 Volts: The Master examination includes equipment-over-600-volts content. Candidates should understand the applicable NEC concepts and Washington supervision restrictions affecting HVAC/R systems containing higher-voltage circuits.

Hazardous Locations: Refrigeration and mechanical equipment can be installed in areas where hazardous-location requirements apply. Review classified locations, suitable equipment, wiring methods, and installation restrictions.

General Trade Knowledge and Theory: The examination includes a significant theory component. Practice voltage, current, resistance, power, conductor calculations, motor calculations, electrical relationships, and general HVAC/R electrical troubleshooting principles.

Washington HVAC/R Specialty Scope: Learn the exact authority and limitations of classification 06A. Master-level candidates should understand what electrical work the specialty may perform and when another electrical classification is required.

Washington Laws and Rules: Study certification, master electrician requirements, contractor assignments, permits, inspections, specialty scope, examinations, and Washington-specific electrical provisions contained in RCW Chapter 19.28 and WAC Chapter 296-46B.

A productive preparation routine combines technical study with timed code navigation. For each practice question, first identify the subject and likely reference. Then locate the applicable NEC provision, RCW section, or WAC rule and determine whether an exception or Washington-specific limitation affects the answer.

How 1 Exam Prep Helps You Reach Your Goal

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

The package supports trade-focused review of HVAC/R equipment, motors, controls, wiring methods, grounding and bonding, overcurrent protection, electrical equipment, electrical theory, specialty scope, and Washington-specific requirements.

1 Exam Prep encourages practice-oriented preparation for the open-book examination. Candidates can strengthen reference-navigation skills by identifying the topic of a question, selecting the correct reference, locating the controlling provision, and applying it accurately.

Experienced HVAC/R electricians may already understand how equipment is installed and serviced in the field. Exam preparation helps connect that practical knowledge with the precise NEC language and Washington regulations governing the specialty.

Washington-specific study is especially important for specialty Master Electricians because classification 06A has defined limits. Candidates should understand not only what the specialty permits but also which general electrical activities remain outside the HVAC/Refrigeration scope.

The goal is to combine practical HVAC/R experience with organized code study, electrical theory, Washington regulatory knowledge, and efficient use of approved references. This Washington A-HVAC/R Master Electrician Book Package provides the core materials needed to build that preparation structure.

Frequently Asked Questions

What is the official Washington HVAC/R classification?

Washington identifies HVAC/Refrigeration as electrical specialty classification 06A.

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 HVAC/R Master Electrician exam open book?

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

How many questions are on the 06A Master Electrician exam?

The published examination outline lists approximately 50 NEC & Theory questions and 20 Washington Codes questions, for approximately 70 questions total.

How much 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 HVAC/R Electrician certificate before taking the master exam?

A specialty Master Electrician candidate must have held the applicable Washington specialty electrician certification for at least two years.

How much experience is required for the underlying 06A Electrician certification?

Washington requires 4,000 hours of qualifying work experience for the 06A HVAC/Refrigeration specialty electrician pathway.

Is classroom instruction required for the 06A Electrician pathway?

Yes. Candidates in the 4,000-hour specialty pathway must complete 48 hours of qualifying basic classroom instruction.

Is the 06A specialty limited by voltage, phase, or amperage?

The Washington 06A HVAC/Refrigeration specialty is not generally limited by voltage, phase, or amperage, but all work must remain within the HVAC/Refrigeration specialty scope and applicable Washington restrictions.

Does a 06A Master Electrician have unrestricted electrical authority?

No. It is a specialty Master Electrician certificate. Electrical work must remain within the 06A HVAC/Refrigeration scope unless the individual holds another certification authorizing additional work.

Can I bring the 2020 NEC into the examination?

Yes. Washington Labor & Industries permits the 2020 NEC during its current electrical examinations, subject to examination rules.

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

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

Who administers the Washington HVAC/R Master Electrician examination?

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

What should I focus on while studying?

Focus on motors and HVAC equipment, overcurrent protection, grounding and bonding, wiring methods, electrical equipment, electrical theory, HVAC/R specialty scope, and Washington electrical laws and rules.