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Washington Residential Maintenance (7B) Contractor License

The Residential Maintenance (7B) Contractor License allows you to do the following work:

  • Maintenance, repair, or replacement of like-in-kind existing electrical utilization equipment, and all permit exempted work for:
    • Residential dwellings
    • Multi Story dwelling structures with no commercial facilities
    • The interior of dwelling units in multistory structures with commercial facilities
  • Work limited to equipment and circuits to a maximum of 250 volts, 60 amperes, and single phase maximum
  • Disconnection and reconnection of low-voltage control and line voltage supply whips not over six feet in length provided:
    • There are no modifications to the characteristics of the branch circuit or whip
  • "Electrical equipment" does not include:
    • Electrical conductors
    • Raceway or conduit systems external to the equipment or whip

The Residential Maintenance (7B) Contractor licensee CANNOT perform any plumbing work.

How to Get the Residential Maintenance (7B) Contractor’s License in Washington?

  1. Be an electrical trainee or have equivalent out-of-state or military experience
  2. Meet the experience and training requirements (You can use the Washington Department of Labor & Industries' tool to verify the hours of experience):
    • Residential Maintenance (7B):
      • 2,000 hours of work experience related to the selected specialty as an electrical trainee
      • 24 hours of basic classroom instruction
      • Be supervised 75% of the time
  3. Fill out the corresponding application form for the electrical examination:
  4. Mail the application and the documents needed to certify the experience required for each license to:
    Electrical Licensing and Certification
    PO Box 44460
    Olympia WA 98504-4460
  5. Register with PSI© and schedule the examination once the application has been reviewed by the Washington State Department of Labor & Industries. For more information on the test, refer to PSI©’s Electrical Certification Candidate Information Bulletin

Washington Residential Maintenance (7B) Contractor License Exam Prep Courses

Washington Residential Maintenance (7B) Contractor License Exams

Below is all the information related to the trade and WA Codes exams, including the official reference lists.

Washington Residential Maintenance (7B) Contractor Trade Exam

  • Testing Method: Computer-based testing
  • Testing Company: PSI©
  • Number of Questions: 20
  • Types of Questions: Multiple choice
  • Time Allowed: 60 Minutes
  • Minimum Passing Score: 70%
  • Subjects Involved (No. of Questions):
    • NEC 90 - Introduction (1)
    • NEC 100-110 - General Requirements (1)
    • NEC 200-225, 280-285 - Wiring & Protection (2)
    • NEC 240 - Overcurrent Protection (2)
    • NEC 250 - Grounding & Bonding (2)
    • NEC 300-398 - Wiring Methods (2)
    • NEC 400-427, 455-480 - Electrical Equipment (2)
    • NEC 430-450 - Motors, HVAC, Generators & Transformers (1)
    • NEC 600-695 - Special Equipment (2)
    • NEC 700-702 - Emergency & Standby Systems (2)
    • General Trade Knowledge & Theory (3)
  • PSI© Residential Maintenance (7B) Official Content Outline

Washington Residential Maintenance (7B) Contractor WA Codes Exam

  • Testing Method: Computer-based testing
  • Testing Company: PSI©
  • Number of Questions: 17
  • Types of Questions: Multiple choice
  • Time Allowed: 60 Minutes
  • Minimum Passing Score: 70%
  • Subjects Involved (No. of Questions):
    • Washington Laws & Rules (RCW & WAC) (17)
  • PSI© WA Codes Official Content Outline

Washington Residential Maintenance (7B) Contractor Book Set

This set of books includes all required references for the Residential Maintenance (7B) and WA Codes exams. Orders placed before 2 PM are shipped the same day via UPS and a tracking number is emailed before 3 PM.

  • WASHINGTON RESIDENTIAL MAINTENANCE (7B) - BOOK SET WITHOUT TABS INCLUDES ALL BOOKS FOR TRADE AND BUSINESS EXAMS

    Sales price: $349.45

  • WASHINGTON RESIDENTIAL MAINTENANCE (7B) - BOOK SET WITH TABS INCLUDES ALL BOOKS FOR TRADE AND BUSINESS EXAMS

    Sales price: $399.45

Washington Residential Maintenance (7B) Contractor Exam Books

Books Allowed in Testing

Washington Residential Maintenance (7B) WA Codes Exam Books

Books Allowed in Testing

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