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Generator Installation · New Hampshire
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.
Ice storms and older New England homes make generators and rewiring common 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 New Hampshire cities where we have written specific notes.
The December 2008 ice storm left many Manchester-area homes without power for days in deep cold, and generators have been a common project ever since. A generator inlet with an interlock lets a portable unit run the boiler or furnace, well pump if there is one, refrigerator and lights safely.
Utility: Eversource
The December 2008 ice storm left much of southern New Hampshire without power, some homes for more than a week in the cold, and nor'easters still cause long outages. Nashua homeowners usually want the furnace or boiler, the sump pump, the well pump in outlying areas and the refrigerator on backup.
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: Manchester: Electrical permits in Manchester come from the city's building regulations office; other towns issue their own. Nashua: Electrical permits inside city limits come from the City of Nashua's building department.
Manchester: Eversource. Nashua: 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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