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Generator Installation · Washington
A generator must connect through a transfer switch or an approved interlock so it can never feed power back into utility lines. Electricians install standby generators, portable generator inlets with interlocks, and the transfer equipment for both.
Wet winters, windstorms and electrification incentives drive generator hookups and panel upgrades.
Across the Pacific, homes deal with mild coast, wildfire seasons inland, and wet winters in the Northwest. Permit offices, utilities and housing stock differ by city, which affects how generator installation is planned and scheduled. These local guides cover the Washington cities where we have written specific notes.
Winter windstorms knock trees into lines around Seattle several times a season, and outages can last from hours to days. The most common setup is a generator inlet with an interlock, letting a portable generator power heat, the refrigerator and some lights safely without backfeeding the grid.
Utility: Seattle City Light
Spokane residents who lived through Ice Storm '96 or the November 2015 windstorm remember going days or weeks without power in the cold, and that memory drives a lot of generator work here. The most common request is a way to keep a gas furnace's blower, the refrigerator and a few lights going: a portable unit plugged into an outside inlet, with a mechanical interlock in the panel so it can never feed power back onto Avista's lines.
Utility: Avista
Fall and winter windstorms knock trees into lines around Tacoma, and outages can last from hours to days. A generator inlet with an interlock lets a portable unit power heat, the refrigerator and some lights safely without backfeeding Tacoma Power's lines.
Utility: Tacoma Power (city-owned)
1. Size the load
Circuits that must stay powered are listed and the generator sized.
2. Choose the connection
Inlet and interlock, manual transfer switch or automatic transfer switch.
3. Install and inspect
Permitted installation, gas connection by a licensed fitter where needed, and inspection.
Electricians set their own prices; local permit fees and utility requirements add to these factors.
Permits come from the city or county where the home is. For example: Seattle: Seattle issues its own electrical permits through the Seattle Department of Construction and Inspections (SDCI); most of the rest of Washington is permitted by the state Department of Labor and Industries. Spokane: Electrical permits in Spokane come from the city's Development Services Center; much of the rest of Washington is permitted by the state Department of Labor and Industries, which also licenses electricians. Tacoma: Electrical permits in Tacoma come from the city's Planning and Development Services; most of the rest of Washington is permitted by the state Department of Labor and Industries, which also licenses electricians.
Seattle: Seattle City Light. Spokane: Avista. Tacoma: Tacoma Power (city-owned).
Listed interlock kits are accepted in many jurisdictions when installed with a permit. Your electrician will know the local rule.
Call now, or send a request and a licensed electrician who serves your ZIP code will contact you.
