Who Can Qualify for the 07D Master Exam?

Washington currently requires a specialty master electrician candidate to have possessed the matching Washington specialty electrician certificate for at least two years.

For this credential, that means holding the 07D Appliance Repair electrician certificate in Washington for the required period before applying for the master examination.

The Master Certificate Replaces the Matching 07D Electrician Certificate

When Washington issues a master electrician certificate, it replaces the electrician certificate held for that same certification category.

You do not carry a separate 07D electrician certificate and 07D master certificate at the same time for the same specialty.

What Can a 07D Master Electrician Do?

Washington allows a certified master electrician to work with the tools of the trade as an installer inside the certificate's scope. A master may also serve as the designated master/administrator for an electrical contractor when properly assigned.

A 07D master can therefore combine:

• Hands-on Appliance Repair electrical work within 07D scope
• Supervision allowed by Washington certification rules
• Code-compliance knowledge
• Washington law and rule compliance
• Contractor scope oversight
• Permit and inspection awareness
• Master/administrator responsibility when properly assigned to a matching contractor

What Is the 07D Appliance Repair Scope?

Washington defines Appliance Repair as servicing, maintaining, repairing, or replacing household appliances, small commercial or industrial appliances, and other small electrical utilization equipment.

The specialty is designed for appliance service, not general premises wiring. A master electrician needs to understand the technical work and the legal boundary around it.

A project can be electrically simple and still be outside the license if it crosses into another specialty, building-system classification, or general electrical construction.

The Main Electrical Limit Is 250 Volts, 60 Amps, Single Phase

Qualifying 07D appliances and utilization equipment must be self-contained and built to standardized sizes or types. They must connect as one unit to one electrical power source limited to 250 volts, 60 amperes, single phase.

Examples of Equipment That Can Fit 07D

Washington gives examples of equipment that may fit within the Appliance Repair specialty when the electrical limits and other scope requirements are satisfied.

• Ovens
• Office equipment
• Vehicle repair equipment
• Commercial kitchen equipment
• Self-contained hot tubs and spas
• Grinders
• Scales
• Other qualifying household or small commercial/industrial appliances

A master should treat the example list as guidance, not as a magic permission slip. Check the actual equipment ratings and the Washington specialty definition.

Several Systems Are Explicitly Excluded

Washington specifically excludes several systems and equipment categories from the ordinary 07D appliance definition.

• Alarm systems
• Energy-management systems and similar systems
• Luminaires
• Furnaces
• Heaters
• Air conditioners
• Heat pumps
• Sewage-disposal equipment
• Door, gate, and similar systems
• Individual components installed together to create a system, such as pumps, switches, and controllers

Master status does not pull these excluded systems into 07D. The specialty line stays where Washington put it.

Like-in-Kind Appliance Replacement Is Included

Washington allows in-place like-in-kind replacement of qualifying appliances or equipment when the same unmodified electrical circuit supplies the replacement.

The specialty also includes like-in-kind replacement of electrical components within the appliance or equipment. That can include internal motors, relays, controls, switches, thermostatic devices, internal conductors, and similar components that are part of the appliance.

The key master-level judgment is knowing whether the project is still an appliance repair or has become a premises-wiring alteration.

The Six-Foot Whip Rule

07D allows disconnection and reconnection of qualifying low-voltage control and line-voltage supply whips no longer than six feet, provided the characteristics of the branch circuit are not modified.

That six-foot number is worth memorizing. It is one of the clearest scope boundaries for appliance connection work.

The Narrow Outlet-Conversion Allowance

Washington allows 07D to install an outlet box and outlet at an existing appliance location when converting a permanently connected appliance to a plug-and-cord connection.

Other than installing that box and outlet, the existing branch circuit cannot be modified.

If the project requires a new circuit from the panel, changed conductor size, relocated branch circuit, new feeder, or broader wiring alterations, the work is outside the narrow allowance.

What Is Outside 07D?

Washington excludes general premises electrical work from Appliance Repair. A 07D Master Electrician should be able to recognize these exclusions quickly.

• Installation, repair, or modification of branch-circuit conductors
• Services
• Feeders
• Panelboards
• Disconnect switches
• Raceway and conductor systems interconnecting multiple appliances, equipment, or electrical components
• Classified-location work covered by the listed NEC Articles 500 through 516
• Plumbing work regulated under Washington plumbing law

A master electrician needs the confidence to say, "That part is outside 07D," before the job becomes a licensing problem.

The Current 07D Master Exam at a Glance

Current 07D Master Exam Blueprint

General Trade Knowledge & Theory is the largest category at about seven questions. Electrical Equipment is the largest named NEC category at about six. General Requirements, Overcurrent Protection, and Grounding & Bonding contribute about three each.

No Separate Major Load Calculations Section

Washington's General Master exam includes a separate Major Load Calculations section. The current 07D Appliance Repair Master exam does not.

That does not mean electrical math disappears. General Trade Knowledge & Theory can still include calculations involving voltage, current, resistance, power, equipment ratings, and practical electrical relationships.

The difference is that you do not have a separate major-load block to schedule or pass for 07D Master.

General Trade Knowledge and Theory Are About Seven Questions

General Trade Knowledge & Theory is the largest single category on the current master technical outline.

• Voltage
• Current
• Resistance
• Power
• Ohm's law
• Series and parallel relationships
• Basic AC theory
• Appliance troubleshooting
• Motor and control fundamentals
• Equipment ratings
• Basic electrical calculations

A master candidate should be able to solve routine theory questions without turning the code index into a life coach.

Electrical Equipment Is About Six Questions

NEC 400-427 and 455-480 contribute about six questions, making Electrical Equipment the largest named NEC category.

• Flexible cords and cables
• Appliance connections
• Equipment ratings
• Equipment nameplates
• Disconnecting concepts
• Internal equipment components
• Heating appliance rules that actually fall inside 07D scope
• Safe like-in-kind equipment replacement

Study the equipment rule and the license scope together. The NEC may explain how a device should be installed while Washington licensing law decides whether 07D can do the job.

General Requirements Are About Three Questions

NEC 100-110 contributes about three questions. Review definitions, equipment listing and labeling, suitable-use concepts, installation requirements, electrical connections, working-space concepts where applicable, and equipment ratings.

Master-level candidates should be comfortable connecting general NEC rules to a practical appliance-service situation.

Overcurrent Protection Is About Three Questions

NEC 240 contributes about three questions. Review conductor protection, equipment protection, overcurrent-device ratings, and how appliance nameplate information interacts with circuit protection.

The master still needs to separate knowledge from scope. Knowing the correct upstream protective device does not mean 07D authorizes general replacement or alteration of that device.

Grounding and Bonding Are About Three Questions

NEC 250 contributes about three questions. Study equipment-grounding conductors, bonding of metal appliance cabinets, fault-current paths, grounding connections, and safe equipment reconnection.

A metal appliance enclosure should not become the most exciting part of the service call. Proper grounding and bonding help protective devices operate when a fault occurs.

Wiring Methods Are About Two Questions

NEC 300-398 contributes about two questions. 07D is not a general wiring license, but a master should still understand proper connection methods and recognize the point where a job crosses into premises wiring.

• Boxes and fittings
• Flexible connections
• Conductor protection
• Protection from physical damage
• Wet and damp locations
• Basic raceway concepts

Motors, Transformers, and Controls Are About Two Questions

NEC 430-450 contributes about two questions. Appliances frequently use motors, relays, contactors, overload devices, and control transformers.

Review motor ratings, overload protection, control transformers, relay logic, contactors, equipment nameplates, and simple motor/control calculations.

Special Conditions Add About Two Questions

NEC 705-780 contributes about two questions. These questions can feel less directly related to appliance service, which is exactly why they are easy to ignore during study.

Use the current PSI outline as the study map. If the bulletin gives a category questions, give that category study time too.

The Washington Codes Section Has 20 Questions

The master Washington Codes section contains about 20 questions, more than the matching administrator or electrician state-law section.

Study:

• Chapter 19.28 RCW
• Chapter 296-46B WAC
• WAC 296-46B-920 Appliance Repair scope
• Master electrician eligibility
• Master and administrator assignment
• Electrical contractor licensing
• Electrician and trainee certification
• Supervision rules
• Permits and inspections
• Examination rules
• Enforcement and penalties
• Renewal and continuing education

Twenty state-law questions means the master exam is not just a harder appliance test. It is also a contractor-compliance exam.

The Current Exam Is Open Book

PSI currently identifies Washington electrical examinations as open book. The current bulletin uses the 2020 National Electrical Code, current Chapter 19.28 RCW, and current Chapter 296-46B WAC.

Original copyrighted references are permitted under the current testing rules. Printed Washington law and rule material may be used in the accepted binder format. Permanent tabs, highlighting, and underlining are allowed before the exam.

Removable tabs, sticky notes, handwritten notes, and writing in the reference books during the exam are not allowed. A silent nonprinting nonprogrammable calculator is permitted.

Current Exam NEC vs. Current Field NEC

Washington currently inspects electrical installations using the 2023 NEC. The state has also announced that the 2026 NEC is scheduled to replace the current 2023 edition on December 31, 2026.

The current PSI exam bulletin, however, is still based on the 2020 NEC. That means master candidates need to separate exam preparation from field-code compliance.

• For the exam: follow the current PSI and L&I testing instructions.
• For field work: follow Washington's currently adopted installation code and amendments.

The Three Core Master References

A practical 07D Master study set starts with:

• 2020 National Electrical Code for the current exam
• RCW Chapter 19.28
• WAC Chapter 296-46B

The Washington General Master Electrician Book Package contains those same core Washington master-level references. It is broader than 07D, so use the current Appliance Repair master blueprint and scope rules to focus your study.

Apply Through Labor & Industries Before PSI

Master candidates must first apply to Washington Labor & Industries. L&I verifies that the candidate meets the two-year specialty-certification requirement.

Once approved, the candidate receives the information needed to schedule with PSI. Washington rules also state that out-of-state credit cannot be used toward qualifying for a master electrician examination.

Approved candidates currently have one year from the approval date to pass all required sections.

Current Retest Rules

The current PSI bulletin requires a 14-day wait after a failed attempt before retesting.

After a third failed attempt, later attempts require a three-month wait from the most recent failure.

Required sections for the certificate category are scheduled for the same examination day.

Current Exam and Master Application Fees

PSI currently lists $65 for a three-hour examination. The 07D Master exam totals three section-hours.

Washington's current fee schedule lists the Master Electrician exam application, original certificate, and processing fee at $204.60. The current schedule identifies $44.20 of that application amount as nonrefundable after submission.

Always verify the live PSI amount and current WAC fee schedule before paying.

Using the Master Certificate as the Contractor's Designated Master

A master electrician can be assigned as the designated master/administrator for an electrical contractor when the assignment and contractor scope satisfy Washington requirements.

For a 07D master, the contractor work must stay inside the Appliance Repair specialty unless the contractor separately holds broader authority.

Washington currently charges $53.00 for assignment or unassignment of a master electrician/administrator designation.

The assigned master should be actively involved in contractor compliance, not simply lend a certificate number and hope paperwork develops a conscience.

Renewal and Continuing Education

Washington master electrician certificates renew every three years and expire on the holder's birthdate.

Current renewal requires 24 hours of approved continuing education:

• At least 8 hours of code update
• At least 4 hours of RCW/WAC review
• 12 additional hours of approved continuing education

Current master renewal is $175.70 online or $202.20 by mail, fax, or in person.

If the certificate is more than 90 days past expiration, Washington requires reapplication and another master electrical examination before reinstatement.

A Practical 07D Master Study Plan

1. Start with 07D scope. Know exactly what Appliance Repair includes and excludes.
2. Memorize 250 volts, 60 amperes, single phase.
3. Memorize the six-foot whip limit and outlet-conversion rule.
4. Practice General Trade Knowledge & Theory. It is the largest category at about seven questions.
5. Study NEC Electrical Equipment topics. They contribute about six questions.
6. Review General Requirements, Overcurrent Protection, and Grounding & Bonding.
7. Review Wiring Methods, motors, controls, and Special Conditions.
8. Study RCW 19.28 and WAC 296-46B as a separate subject.
9. Take 30-question NEC/Theory practice sections in two hours.
10. Take 20-question Washington Codes practice sections in one hour.

Study Like an Installer and a Contractor Master

Master-level study should look at every appliance job twice. First, look at it as an electrician. What is the appliance rating? Is it single phase? How is it connected? What internal motor, relay, control, heater, or protective component is involved? Is the frame properly grounded and bonded?

Then look at it as the person responsible for contractor compliance. Is the job still 07D? Is the technician modifying a branch circuit? Is the project becoming HVAC, alarm, door/gate, classified-location, plumbing, or general wiring work? Are permits and inspections handled correctly? Are workers properly certified?

Review the Washington Appliance Repair Master Electrician 07D collection for specialty-focused preparation.

For the broader core code-and-law references, review the Washington General Master Electrician Book Package. For licensing support, review 1ExamPrep application services. For books, exam costs, licensing expenses, and related professional expenses, review 1ExamPrep financing options.

Frequently Asked Questions

Conclusion

The Washington Appliance Repair Master Electrician 07D certificate is the master-level credential for experienced Appliance Repair specialty electricians. It allows continued hands-on work within the specialty and can support contractor master/administrator responsibility when the master is properly assigned.

The eligibility rule is straightforward. Washington currently requires a master specialty electrician applicant to have possessed the matching Washington specialty electrician certificate for at least two years. For this credential, that means two years with the 07D Appliance Repair electrician certificate.

Washington also states that out-of-state credit cannot be applied toward qualifying for the master electrician examination. L&I verifies eligibility before the candidate schedules with PSI.

When the master certificate is issued, it replaces the electrician certificate for the same certification category. The 07D master remains an Appliance Repair specialist. Master status increases responsibility but does not turn 07D into a general electrical license.

The specialty is built around qualifying household appliances, small commercial or industrial appliances, and other small electrical utilization equipment. The equipment must be self-contained, built to standardized sizes or types, and connected as one unit to one source of electrical power limited to 250 volts, 60 amperes, single phase.

Washington lists examples such as ovens, office equipment, vehicle repair equipment, commercial kitchen equipment, self-contained hot tubs and spas, grinders, and scales. The examples are helpful, but the electrical limits and exclusions still decide whether the work belongs in 07D.

Several systems fall outside the ordinary Appliance Repair scope. Alarms, energy-management systems, luminaires, furnaces, heaters, air conditioners, heat pumps, sewage-disposal equipment, door and gate systems, and separate components assembled into systems are excluded.

The specialty allows in-place like-in-kind replacement of qualifying appliances when the same unmodified electrical circuit is used. It also allows like-in-kind replacement of electrical components inside the appliance.

The six-foot whip rule provides a limited appliance-connection allowance. Qualifying low-voltage control and line-voltage supply whips up to six feet can be disconnected and reconnected if the branch-circuit characteristics remain unchanged.

Washington also provides a narrow outlet-conversion allowance. At an existing appliance location, 07D may install an outlet box and outlet when converting a permanently connected appliance to plug-and-cord. Other branch-circuit modifications are not part of that allowance.

General premises electrical work remains outside 07D. The specialty does not authorize general branch-circuit conductor work, services, feeders, panelboards, disconnect switches, interconnecting raceway/conductor systems, classified-location work identified by Washington, or regulated plumbing.

The current 07D Master exam contains about 30 NEC and Theory questions and allows two hours for that section. Washington Codes contains about 20 questions and allows one hour. The current published total is 50 scored questions over three section-hours.

There is no separate Major Load Calculations section. Electrical math can still appear in General Trade Knowledge & Theory, but 07D does not have a separate major-load exam block.

General Trade Knowledge & Theory is the largest category at about seven questions. Electrical Equipment contributes about six. General Requirements, Overcurrent Protection, and Grounding & Bonding contribute about three each. Wiring Methods, Motors/HVAC/Generators/Transformers, and Special Conditions contribute about two each.

The Washington Codes section deserves serious preparation. It contains about 20 questions and tests master eligibility, specialty scope, contractor licensing, master/administrator assignment, worker certification, supervision, permits, inspections, exam rules, enforcement, renewal, and continuing education.

The current PSI bulletin identifies the exam as open book and bases Washington electrical testing on the 2020 National Electrical Code, current RCW 19.28, and current WAC 296-46B. Prepare those references before exam day with the permitted permanent tabs, highlighting, and underlining.

Washington field work currently uses the 2023 NEC, while the current exam bulletin still uses the 2020 NEC. The state has announced that the 2026 NEC is scheduled to replace the current 2023 field code on December 31, 2026. That means candidates should always confirm the exam reference close to the actual testing date.

Master candidates apply through Labor & Industries first. Once L&I confirms the required two-year specialty history, the candidate can schedule the exam with PSI. Approved candidates currently have one year to pass all required sections.

The current PSI fee schedule lists $65 for a three-hour examination. Washington's current fee schedule lists $204.60 for the Master Electrician exam application, original certificate, and processing fee.

If the master is assigned to a contractor, the current assignment or unassignment fee is $53. That assignment carries real compliance responsibility for the contractor's work.

The master certificate renews every three years on the holder's birthdate. Current renewal requires 24 hours of approved continuing education, including at least 8 hours of code update and 4 hours of RCW/WAC review. Current master renewal is $175.70 online or $202.20 by mail, fax, or in person.

Strong 07D Master preparation combines appliance troubleshooting with contractor-level judgment. Learn how the appliance works, how the NEC applies, and exactly where the Appliance Repair specialty ends. At the master level, knowing how to repair the equipment matters, but knowing when the contractor should stop matters too.

Key Takeaways

• Washington 07D Master candidates must have held the matching Washington Appliance Repair electrician certificate for at least 2 years, and out-of-state credit cannot be used to qualify for the master exam.
• The current 07D Master exam has about 30 NEC/Theory questions in 2 hours plus 20 Washington Codes questions in 1 hour, for 50 published scored questions.
• The exam is open book, currently uses the 2020 NEC plus current RCW 19.28 and WAC 296-46B, and has no separate Major Load Calculations section.
• 07D remains limited to qualifying self-contained appliance/utilization equipment up to 250 volts, 60 amperes, single phase, with strict exclusions for general premises wiring and other specialty systems.
• The current master application fee is $204.60, and master certificates renew every 3 years with 24 hours of approved continuing education.

Plain-Language Summary

Washington's Appliance Repair Master Electrician 07D certificate is the master-level credential for people who already hold the 07D specialty electrician certificate.

To qualify for the master exam, Washington currently requires you to have held the matching Washington specialty electrician certificate for at least two years.

Washington does not allow out-of-state credit toward qualifying for the master electrician examination. You apply to Labor & Industries first, and L&I confirms your eligibility before you schedule with PSI.

When the master certificate is issued, it replaces your 07D electrician certificate for the same category.

A 07D Master Electrician can keep performing hands-on Appliance Repair work within the specialty scope. The master can also act as the designated master/administrator for an electrical contractor when Washington's assignment rules are satisfied.

The specialty covers qualifying household appliances, small commercial or industrial appliances, and other small electrical utilization equipment.

The equipment must be self-contained and connected as one unit to one electrical power source. The main electrical limit is 250 volts, 60 amperes, single phase.

Washington gives examples such as ovens, office equipment, vehicle repair equipment, commercial kitchen equipment, self-contained hot tubs and spas, grinders, and scales.

Some systems are excluded. Alarm systems, energy-management systems, luminaires, furnaces, heaters, air conditioners, heat pumps, sewage equipment, door/gate systems, and separate components assembled into systems are not ordinary 07D work.

07D can replace qualifying appliances like in kind when the same unmodified circuit is used. It can also replace like-in-kind electrical components inside the appliance.

Qualifying low-voltage control and line-voltage supply whips up to six feet can be disconnected and reconnected when the branch-circuit characteristics are not changed.

There is one narrow outlet exception. At an existing appliance location, 07D can install an outlet box and outlet when converting a permanently connected appliance to plug-and-cord. The rest of the branch circuit cannot be modified.

The specialty does not allow general premises wiring. It does not authorize general branch-circuit conductor work, services, feeders, panelboards, disconnect switches, interconnecting raceway/conductor systems, classified-location work, or plumbing.

The current 07D Master exam has 30 NEC and Theory questions and gives you two hours. The Washington Codes section has 20 questions and gives you one hour. That is 50 published scored questions across three section-hours.

There is no separate Major Load Calculations section. The exam is open book and currently uses the 2020 National Electrical Code, current RCW 19.28, and current WAC 296-46B.

General Trade Knowledge & Theory is the largest exam category at about seven questions. Electrical Equipment is about six. General Requirements, Overcurrent Protection, and Grounding & Bonding are about three each.

Washington field work currently uses the 2023 NEC, so keep the field-code edition separate from the current exam-reference edition. Washington has announced that the 2026 NEC is scheduled to replace the current 2023 field code on December 31, 2026.

The current PSI schedule lists $65 for a three-hour examination. Washington currently lists $204.60 for the master electrician exam application, original certificate, and processing fee.

Master electrician certificates renew every three years on your birthdate. Current renewal requires 24 hours of approved continuing education, including at least 8 hours of code update and 4 hours of RCW/WAC review.

Use the Washington Appliance Repair Master Electrician 07D collection from 1ExamPrep to organize your preparation around appliance scope, the 2020 NEC exam reference, Washington law, Electrical Equipment, trade theory, grounding and bonding, overcurrent protection, and master-level contractor compliance.