Who Can Qualify for the 07 Master Exam?

Washington treats this as a specialty master credential. To qualify for the master specialty examination, you must have held the matching Washington specialty electrician certificate for at least two years. For this exam, that means the full 07 Nonresidential Maintenance specialty, not only one of the narrower 07A through 07E sub-specialties.

Labor & Industries reviews master eligibility before PSI scheduling. Once the master certificate is issued, it replaces the electrician certificate for the same category. The master can still work with the tools of the trade inside the specialty and can also serve as the designated master for a matching electrical contractor when assignment rules are satisfied.

Full 07 Is Broader Than Restricted 07C

The full 07 Nonresidential Maintenance specialty is much broader than 07C Restricted Nonresidential Maintenance. Washington defines full 07 as maintenance, repair, and replacement of like-in-kind existing electrical equipment and conductors.

That wording matters. Full 07 includes existing conductors, which is one reason the exam gives heavy weight to Wiring Methods. Still, the specialty is about maintenance. It should not be stretched into a general new-construction license. If a project becomes a major expansion, redesign, new installation, or general construction job, the contractor may need broader authority.

Temporary Load Testing Up to 600 Volts

Washington specifically allows full 07 to install and connect temporary conductors and equipment for load testing, not to exceed 600 volts. That is useful in commercial and industrial maintenance work where a generator, distribution system, motor, transfer system, or other equipment needs to be tested under load.

The setup is temporary and tied to testing. The rule does not turn temporary test equipment into a permanent installation. For exam prep, remember the 600-volt ceiling and the purpose: load testing.

Lower-Rated Replacement Equipment and Protection

When replacement equipment has a lower ampere rating than the equipment being replaced and the ampacity of the existing conductors is not modified, full 07 may replace an overcurrent or overload protection device with a lower-rated device that matches the nameplate rating of the new equipment.

This is a practical maintenance rule. It lets the electrician match protection to the new equipment without changing the existing conductor ampacity. It also explains why NEC 240 and equipment nameplate knowledge matter on the master exam.

Full 07 Includes 07A Through 07E Work

Washington allows full 07 Nonresidential Maintenance to perform the work defined in the five narrower maintenance specialties: 07A Nonresidential Lighting Maintenance and Lighting Retrofit, 07B Residential Maintenance, 07C Restricted Nonresidential Maintenance, 07D Appliance Repair, and 07E Equipment Repair.

That crossover is useful in the field and important for exam study. A master candidate should understand the basic boundaries of those smaller specialties because the full 07 umbrella includes them. Scope crossover does not mean every task becomes general electrical work. The work still has to fit the maintenance rules.

07A Lighting Maintenance Crossover

07A is focused on work inside existing nonresidential luminaires for repair, service, maintenance, ballast or socket replacement, and qualifying lighting retrofit upgrades. It does not authorize new luminaires, new branch circuits, ordinary relocation of existing luminaires, or branch-circuit alteration.

Full 07 is broader, but the 07A definition is still worth knowing because it shows one recognized lighting-maintenance path included under the full 07 specialty.

07B Residential Maintenance Crossover

Full 07 may also perform 07B Residential Maintenance work. The 07B specialty is limited to qualifying residential occupancies and to equipment and circuits not exceeding 250 volts, 60 amperes, single phase.

Washington also says residential maintenance activity performed under full 07 does not count as training experience toward qualification for the 02 Residential specialty exam. Being allowed to do crossover work and receiving training credit for another certificate are two different questions.

07C, 07D, and 07E Crossover

Full 07 includes 07C Restricted Nonresidential Maintenance, 07D Appliance Repair, and 07E Equipment Repair. These narrower classifications cover restricted maintenance, qualifying appliance service, and utilization-equipment repair.

A full 07 master should recognize those boundaries because maintenance contractors often handle a mix of equipment, lighting, controls, appliances, motors, and existing conductors. The broader certificate makes that mix possible without turning every service call into General 01 work.

Current 07 Master Exam at a Glance

Current 07 Master Exam Blueprint

The number of questions in each individual knowledge area is approximate, so study the blueprint as a guide rather than a promise carved into a panelboard.

Wiring Methods Are the Largest NEC Category

Wiring Methods is the biggest named NEC category on the current master blueprint at about eight questions. Study boxes, fittings, raceways, cable methods, flexible connections, conductor protection, physical-damage rules, wet and damp locations, and maintenance of existing conductors.

Because full 07 explicitly includes existing conductors, this is not just background code knowledge. Wiring Methods sits right in the middle of the specialty's real-world maintenance work.

General Trade Knowledge and Theory

General Trade Knowledge & Theory contributes about six questions. Review voltage, current, resistance, power, Ohm's law, AC theory, series and parallel relationships, three-phase basics, electrical measurements, equipment ratings, troubleshooting logic, and common trade calculations.

Open book does not mean open forever. If every basic theory problem sends you to the index, the three-hour technical section can get crowded fast.

Overcurrent Protection and Grounding & Bonding

NEC 240 Overcurrent Protection contributes about four questions, and NEC 250 Grounding & Bonding contributes about four more. Review protective-device ratings, conductor protection, equipment protection, bonding, equipment-grounding conductors, fault-current paths, and grounding connections.

These topics also connect directly to replacement equipment. A maintenance master needs to understand how the existing conductors, new equipment nameplate, and protective devices work together.

Electrical Equipment, Motors, HVAC, Generators, and Transformers

Electrical Equipment contributes about four questions. Motors, HVAC, Generators & Transformers contributes about four more. That fits the specialty because nonresidential maintenance often involves motor-driven equipment, contactors, starters, overloads, transformers, generators, process equipment, and commercial building systems.

Study nameplates, disconnecting concepts, motor protection, controls, overloads, transformer basics, generator fundamentals, and safe like-in-kind replacement.

Hazardous Locations and Special Systems

Hazardous Locations contributes about three questions. Special Equipment contributes about three, and Emergency & Standby Systems contributes about three. Full 07 maintenance can occur in industrial plants, repair facilities, manufacturing spaces, commercial buildings, and other sites where specialized NEC rules matter.

Do not skip these smaller categories. A few questions can decide whether a passing score stays comfortable or becomes a very long drive home.

Washington Codes Section

The Washington Codes section contains 20 questions in one hour. Study Chapter 19.28 RCW and Chapter 296-46B WAC as their own subject. Focus on full 07 scope, 07A through 07E crossover, master qualification, contractor licensing, master assignment, worker certification, permits, inspections, examination rules, renewal, continuing education, enforcement, and penalties.

Experienced electricians sometimes underestimate this section because the NEC feels more familiar. State law does not care how many motors you have repaired if you cannot find the rule that controls the license.

Open-Book Rules and Current Exam References

The current Washington electrical exam is open book. PSI currently bases Washington electrical licensing exam questions on the 2020 National Electrical Code, current RCW 19.28, and current WAC 296-46B.

Original copyrighted references may be highlighted, underlined, and permanently tabbed before testing. Removable tabs, sticky notes, handwritten notes, and writing in the references during the exam are not permitted. A silent nonprinting nonprogrammable calculator is allowed.

Exam NEC vs. Current Field NEC

Washington currently uses the 2023 NEC for field installations and inspections, while the current licensing-exam bulletin still uses the 2020 NEC. Washington has adopted the 2026 NEC with an effective date of December 31, 2026.

Keep those two questions separate. For exam day, follow the current PSI and L&I exam-reference instructions. For actual field work, follow the NEC edition and Washington amendments currently in force. Recheck the official bulletin before your test date because the exam reference can change on a different schedule.

Apply Through L&I Before PSI

Master candidates apply through Washington Labor & Industries before scheduling the examination. L&I reviews the application and verifies the specialty-master eligibility requirement. Once approved, the candidate receives scheduling instructions for PSI.

The current PSI bulletin gives approved candidates one year from the approval date to pass all required sections. A failed attempt requires a 14-day wait before retesting. After a third failed attempt, later attempts require a three-month wait from the most recent failure.

Current Fees

Washington's current fee schedule lists $204.60 for the Master Electrician exam application, original certificate, and processing fee. The current assignment or unassignment fee for a master/administrator designation is $53.00.

The 07 Master exam totals four section-hours. PSI's current fee table lists $75 for a four-hour examination, and the bulletin notes that first-time Master Electrician exams are billed at a flat rate. Always verify the live scheduling amount before paying because provider fees can change.

Renewal and Continuing Education

Washington master electrician certificates renew every three years and expire on the holder's birthdate. A normal three-year certification period currently requires 24 hours of approved continuing education, including at least eight hours of code update and four hours of RCW/WAC review.

Current master renewal is $175.70 online or $202.20 by mail, fax, or in person. If the certificate is more than 90 days expired, Washington requires reapplication and another master examination before reinstatement.

A Practical Study Plan

Start with the full 07 scope in WAC 296-46B-920. Then study the 07A through 07E crossover categories so you can recognize how the maintenance umbrella fits together. Put extra time into Wiring Methods because it is the largest named NEC category.

Next, drill General Trade Knowledge & Theory, NEC 240, NEC 250, Electrical Equipment, motors and controls, hazardous locations, emergency systems, and Washington law. Practice a 54-question technical block in three hours and a 20-question Washington Codes block in one hour. Open-book speed comes from knowing where the answer probably lives before you start flipping pages.

Study Resources

Review the Washington Nonresidential Maintenance Master Electrician collection for the topic-specific study path.

For the three core Washington master references, review the Washington General Master Electrician Book Package. It contains the 2020 NEC, RCW 19.28, and WAC 296-46B, although the package is broader than the 07 specialty.

For licensing paperwork, review 1ExamPrep application services. For books, exam fees, licensing expenses, and related professional costs, review 1ExamPrep financing options.

Frequently Asked Questions

Conclusion

The Washington Nonresidential Maintenance Master Electrician 07 certificate is the master-level credential for electricians who already hold the full 07 Nonresidential Maintenance specialty. To qualify for the specialty master exam, Washington requires at least two years with the matching specialty electrician certificate.

Full 07 is broader than the restricted 07C classification. Washington allows maintenance, repair, and like-in-kind replacement of existing electrical equipment and conductors. The specialty also allows temporary conductors and equipment for load testing up to 600 volts. When replacement equipment has a lower ampere rating and the existing conductor ampacity is unchanged, 07 can also lower the rating of the overcurrent or overload protection device to match the new equipment.

The crossover authority is another major part of the license. Full 07 may perform work defined under 07A Nonresidential Lighting Maintenance and Lighting Retrofit, 07B Residential Maintenance, 07C Restricted Nonresidential Maintenance, 07D Appliance Repair, and 07E Equipment Repair. That broad maintenance umbrella is useful, but it does not turn the certificate into General 01 authority.

The current master exam has 54 NEC & Theory questions with three hours allowed and 20 Washington Codes questions with one hour allowed. That is 74 published scored questions across four section-hours. There is no separate Major Load Calculations section.

Wiring Methods is the largest named NEC category at about eight questions. General Trade Knowledge & Theory is about six. Overcurrent Protection, Grounding & Bonding, Electrical Equipment, and Motors/HVAC/Generators/Transformers contribute about four questions each. Hazardous Locations, Special Equipment, and Emergency & Standby Systems contribute about three each.

The current exam is open book. PSI bases Washington electrical licensing questions on the 2020 NEC, current RCW 19.28, and current WAC 296-46B. Washington field work currently uses the 2023 NEC, and the state has adopted the 2026 NEC effective December 31, 2026. Because exam references can change on a different schedule, candidates should verify the bulletin shortly before testing.

Master candidates apply through Labor & Industries before PSI scheduling. Approved candidates currently have one year to pass the required exam. Failed attempts trigger waiting periods before retesting.

Washington currently lists $204.60 for the Master Electrician exam application, original certificate, and processing fee. PSI's current table lists $75 for a four-hour exam. Master renewal is every three years on the holder's birthdate. A normal renewal period requires 24 hours of approved continuing education, including at least eight hours of code update and four hours of RCW/WAC review.

A strong 07 Master study plan should feel like a maintenance plan. Start with the biggest systems, find the weak points, test under realistic conditions, and do not wait until the night before the exam to discover that Wiring Methods has eight questions and your tabs have become modern art.

Key Takeaways

• Washington specialty master candidates need at least 2 years with the matching specialty electrician certificate.
• Full 07 covers maintenance, repair, and like-in-kind replacement of existing electrical equipment and conductors, plus temporary load testing up to 600 volts and 07A through 07E crossover work.
• The current 07 Master exam has 54 NEC/Theory questions in 3 hours plus 20 Washington Codes questions in 1 hour, for 74 published scored questions.
• The exam is open book and currently uses the 2020 NEC, RCW 19.28, and WAC 296-46B. There is no separate Major Load Calculations section.
• The current master application fee is $204.60, and renewal is every 3 years with 24 hours of approved continuing education.

Plain-Language Summary

Washington's Nonresidential Maintenance Master Electrician 07 certificate is for experienced electricians who already hold the full 07 specialty. You need at least two years with the matching Washington specialty electrician certificate before qualifying for the master exam.

The full 07 scope is broader than restricted 07C. It covers maintenance, repair, and like-in-kind replacement of existing electrical equipment and conductors. It also allows temporary conductors and equipment for load testing up to 600 volts.

When replacement equipment has a lower ampere rating and the existing conductor ampacity is not changed, 07 can lower the overcurrent or overload protection device rating to match the new equipment.

Full 07 also includes the work of 07A lighting maintenance and retrofit, 07B residential maintenance, 07C restricted nonresidential maintenance, 07D appliance repair, and 07E equipment repair.

The current master exam has 54 NEC & Theory questions in three hours plus 20 Washington Codes questions in one hour. That is 74 published scored questions. There is no separate Major Load Calculations section.

Wiring Methods is the biggest named NEC category at about eight questions. General Trade Knowledge & Theory is about six. Overcurrent Protection, Grounding & Bonding, Electrical Equipment, and Motors/HVAC/Generators/Transformers are about four questions each.

The exam is open book and currently uses the 2020 NEC, current RCW 19.28, and current WAC 296-46B. Washington field work currently uses the 2023 NEC. The state has adopted the 2026 NEC effective December 31, 2026, so check the current exam bulletin before test day.

Master candidates apply through Labor & Industries before scheduling with PSI. Washington currently lists $204.60 for the master application, original certificate, and processing fee. PSI's current fee table lists $75 for a four-hour exam.

Master electrician certificates renew every three years on the holder's birthdate. A normal three-year renewal requires 24 hours of approved continuing education, including eight hours of code update and four hours of RCW/WAC review.

Use the 1ExamPrep Washington Nonresidential Maintenance Master Electrician collection to organize your study around full 07 scope, Wiring Methods, theory, grounding and bonding, overcurrent protection, motors, special systems, and Washington law.