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Generator Installation · Connecticut
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.
Older housing stock and nor'easter outages make rewiring, panel replacement and generator transfer switches frequent projects.
Across the Northeast, homes deal with cold winters, nor'easters and ice storms. Permit offices, utilities and housing stock differ by city, which affects how generator installation is planned and scheduled. These local guides cover the Connecticut cities where we have written specific notes.
Tropical Storm Isaias in 2020 and the October 2011 snowstorm both left large parts of Connecticut without power for days, and Hartford-area homeowners increasingly install backup power. A generator inlet with an interlock lets a portable generator run a boiler or furnace, refrigerator and lights safely.
Utility: Eversource
Irene, Sandy and Isaias each left parts of the New Haven area without power for days, and homeowners along the shore in Morris Cove and the Annex are especially exposed. A portable unit connected through an exterior inlet and panel interlock can carry a boiler, refrigerator and lights without backfeeding UI's lines.
Utility: United Illuminating (UI)
Hurricane Sandy and Tropical Storm Isaias both caused long outages in Bridgeport, and nor'easters still knock out power. Many homeowners want backup for the boiler or furnace, refrigerator and sump pump.
Utility: United Illuminating (UI)
The October 2011 snowstorm left most of Waterbury without power for days, and Tropical Storm Isaias in 2020 caused widespread outages too. Homeowners on Waterbury's hills usually want backup for the oil or gas boiler, refrigerator and sump pump.
Utility: Eversource
Tropical Storm Isaias in August 2020 left a large share of Eversource customers in Connecticut without power, some for a week, and Hurricane Sandy and nor'easters have caused long outages in Stamford too. Homeowners in North Stamford often rely on well pumps, which stop when the power does.
Utility: Eversource
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: Hartford: Electrical permits in Hartford come from the city's Licenses and Inspections division; West Hartford and other towns issue their own. New Haven: Electrical permits in New Haven come from the city's building department; surrounding towns issue their own. Bridgeport: Electrical permits come from the City of Bridgeport's building department. Waterbury: Electrical permits come from the City of Waterbury's building department. Stamford: Electrical permits come from the City of Stamford's building department.
Hartford: Eversource. New Haven: United Illuminating (UI). Bridgeport: United Illuminating (UI). Waterbury: Eversource. Stamford: Eversource.
Listed interlock kits are accepted in many jurisdictions when installed with a permit. Your electrician will know the local rule.
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