Knob and Tube Wiring Replacement
ACS Electrical Contractors provides expert knob and tube wiring replacement for homeowners with outdated wiring systems. These older installations, typically found in pre-1950s homes, present fire hazards and cannot support modern electrical demands. Our licensed electricians remove the old wiring and install safe, code-compliant alternatives.
Overview
Knob and tube wiring was the standard method for residential electrical work from roughly 1880 to 1940, and it is still hiding inside the walls of a surprising number of Maine homes. The system relies on single copper conductors suspended on ceramic knobs and protected by ceramic tubes where they pass through framing. It was designed for an era when a house might pull a few hundred watts to run a radio and a couple of bulbs a far cry from today.
Modern electrical loads, sustained draw from space heaters, window AC units, microwaves, and home offices push knob and tube wiring beyond what it was ever engineered to carry. Insulation that has dried and cracked over nine decades, splices buried behind plaster, and the absence of any grounding conductor all combine to create real fire and shock risks. Replacing it with modern NM cable on a grounded panel is the only durable fix and it is often a prerequisite for homeowners insurance renewals.
What the Replacement Involves
We begin with a full walkthrough and a load-calculation survey of the home. In older houses the knob and tube is rarely uniform one room may have been updated in the 1970s while the attic and basement circuits remain original. We map what is live, what is abandoned in place, and what is still carrying load, and we identify any splices hidden in junction boxes or buried in plaster. That map drives the scope and the estimate.
From there we pull new 12- and 14-gauge NM cable to every device, land it on a modern grounded panel, replace two-prong receptacles with grounded or GFCI/AFCI-protected outlets as code requires, and bond the service appropriately. Where walls and ceilings allow, we fish cable behind finished surfaces to keep disruption minimal; where they do not, we coordinate with your carpenter or drywaller on access and patch. Every replacement we do is permitted and inspected by the local Authority Having Jurisdiction.
Why Choose ACS?
- Reduce the risk of electrical fires and overheating by replacing outdated, ungrounded wiring.
- Updated wiring is a major selling point for buyers and may improve home insurance eligibility.
- Modern wiring supports today's electrical loads, reducing overloads and power interruptions.
Enhanced Safety
Reduce the risk of electrical fires and overheating by replacing outdated, ungrounded wiring.
Increased Home Value
Updated wiring is a major selling point for buyers and may improve home insurance eligibility.
Better Power Capacity
Modern wiring supports today's electrical loads, reducing overloads and power interruptions.
Serving the Lewiston-Auburn Area
A large share of the housing stock in Lewiston, Auburn, Lisbon, and Sabattus dates to the mill-town building boom of the late 1800s and early 1900s, which means knob and tube is a regular finding on the pre-purchase inspections we are called in on. Lenders and insurers in this market increasingly flag active knob and tube as a condition of coverage, and buyers backing out over it is no longer unusual. As a locally licensed and insured contractor that has worked on homes across Androscoggin and neighboring counties for over 22 years, we are equipped to move quickly on estimates when a purchase-and-sale is on the clock and to stage the work so your family can keep living in the house while the project runs.