Mills shaped South Berwick’s village, and the Portsmouth Manufacturing Company’s cotton mill ran at Quampheagan Falls from 1831 to 1893. The houses built through that century and into the next, about 22 percent of the town’s stock predates 1940, were wired after the fact, first with knob-and-tube and later with cloth-insulated cable, and many have been added to room by room ever since. Opening a wall in one of them can turn up three generations of wiring, ungrounded outlets, junction splices buried in plaster, and circuits that run to rooms nobody expects.
The town’s later houses bring different tasks. The 1980s and 1990s homes that make up about 38 percent of the stock have grounded wiring and breaker panels, but they usually lack the AFCI protection now required on most living-space circuits and have too few outlets and circuits for today’s kitchens, home offices and workshops. Finished basements, additions and garage conversions need new circuits, GFCI protection where water is present, and often a sub-panel. Some houses from the 1960s and 1970s were wired with aluminum branch circuits, which need connectors rated for aluminum at every device. Smoke and carbon monoxide alarms are part of the same picture: an addition or a finished basement usually means adding interconnected alarms that sound together throughout the house.
South Berwick’s code office says a single-family residence does not need an electrical permit or inspection, while multi-unit dwellings and commercial projects need a permit from the State Electrical Office. With no inspector checking single-family work, the quality of the job rests on the electrician doing it. Goodnow Electric is licensed under Maine master electrician license MS60021971, is bonded and insured, and the owner is on site for every job. For multifamily buildings, where the state permit applies, Goodnow Electric files it and handles the inspection. Every project, from a single outlet to a full rewire, starts with a free written estimate. When walls are open for a remodel in an older village house, that is the cheapest moment to replace the old cable behind them rather than splice new work onto it.