Fall at Skagit Hydroelectric Project, Photo by Kevin Lidtka
Seattle City Light LARRY WEIS, General Manager and CEO
Electrical Engineering Services
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Electric Service Applications

An electrical service application is required for the following services:
  • Existing service alteration
  • Existing service removal
  • New, permanent service under 600 amps
  • New, permanent service 600 amps and above
  • Temporary service for construction
  • Construction clearance
  • New streetlight service
  • Solar interconnection
All applications require:
  • Project address
  • Customer name, mailing address, phone and email
  • Owner, electrician or contractor contact information
  • Service type
  • Date service connection is needed
For each service type, the following additional information will also be required:

Service type Additional information
Existing service alteration

Submitted with application via email
  • Permit number (if available)
  • Site plan
  • Load calculation
  • Electrical one-line riser diagram, including voltage and amperage
  • Floor plan
Existing service removal

Submitted with application via email
  • Site plan
  • Service voltage
  • Overall service amperage
Temporary service for construction

Submitted with application via email
  • Permit number (if available)
  • Site plan
  • Load calculation
  • Electrical one-line riser diagram, including voltage and amperage
New, permanent service – less than 600 amps

Submitted with application via email
  • Permit number (if available)
  • Site plan
  • Load calculation
  • Electrical one-line riser diagram, including voltage and amperage
  • Floor plans
  • Elevation diagram (where applicable)
New, permanent service – 600 amps and above

City Light will request supporting documentation after the application is received and a pre-design meeting is scheduled
  • Permit number (if available)
  • Site plan
  • Load calculation
  • Electrical one-line riser diagram, including voltage and amperage
  • Floor plans
  • Elevation diagram (where applicable)
Construction clearance

Submitted with application via email
  • Permit number (if available)
  • Construction clearance plan
New streetlight services

Submitted with application via email
  • Permit number (if available)
  • Streetlight plan
Solar interconnection

Submitted with application via email
  • Permit number (if available)
  • Solar one-line and production meter wiring diagram
  • Signed Interconnection Agreement



Related Content
contact us
Small/Medium Projects North of Denny Way
1300 North 97th Street
Residential & Commercial
(206) 615-0600
fax: (206) 684-4299


Small/Medium Projects South of Denny Way
3613 4th Avenue South
(206) 386-4200
fax: (206) 386-4222


Large Commercial and Industrial Projects
1 MW demand and greater, Seattle Municipal Tower
700 Fifth Avenue
(206) 684-3186
fax: (206) 287-5231


  • Contact Seattle City Light

    700 5th Avenue
    Suite 3200
    P.O. Box 34023
    Seattle, WA 98124-4023


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