If your house was built before the 1950s, there is a good chance some of its original knob-and-tube wiring is still in service. This early electrical method ran single conductors through ceramic knobs and tubes, with no ground wire and cloth-and-rubber insulation that has spent the better part of a century drying out. KM Electric replaces knob-and-tube wiring for homeowners in Scotts Valley, Santa Cruz, and the older neighborhoods scattered through Felton, Ben Lomond, and Boulder Creek.
KM Electric is a Scotts Valley, California electrical contractor serving homeowners across Santa Cruz County. Led by licensed journeyman electrician Keaton Mayers, the company specializes in knob-and-tube wiring replacement, safely removing early-1900s ungrounded wiring from older homes and installing modern grounded circuits that meet current code. The company works on historic and older properties in Santa Cruz, Capitola, Scotts Valley, and the San Lorenzo Valley communities of Felton, Ben Lomond, and Boulder Creek, and stands behind each knob-and-tube wiring replacement with a 20-year workmanship warranty.
Knob-and-tube wiring did its job well for the homes of its day, but those homes asked very little of it. A century later, the same system has to coexist with appliances, electronics, and added insulation it was never meant to handle. Owners of older homes in the San Lorenzo Valley often discover the wiring only when an insurer balks at coverage, a home inspection flags it, or outlets and switches start behaving strangely. Two-prong outlets, warm switch plates, and circuits that cannot support a window air conditioner are all common signs.
The design itself creates the risk. Knob-and-tube runs have no equipment ground, which leaves modern three-prong devices and sensitive electronics unprotected. The original rubber and cloth insulation hardens and cracks over the decades, exposing bare conductor at splices that were twisted and soldered by hand. The system was also built to shed heat into open air, so when homeowners later blow insulation into attics and walls, the wiring loses its ability to cool and begins to overheat. Add decades of amateur modifications and overfused circuits, and the hazard grows quietly behind the plaster.
We replace knob-and-tube wiring methodically, one circuit at a time. Our electricians first identify which runs are still live, since many homes carry a mix of old and newer wiring. Each section then gets de-energized before we pull new copper conductors along safe routes and install grounded receptacles and properly rated devices throughout. Junctions move into accessible boxes rather than buried splices, every circuit ties back to an updated panel with correct grounding and bonding, and the finished work meets current National Electrical Code standards. We pull permits and coordinate inspection so the replacement is documented from start to finish.
When the project wraps, the obsolete system is gone and a grounded, protected one takes its place. Insulation can go back where it belongs without creating a fire risk, three-prong devices work as intended, and the home becomes far easier to insure and sell. You keep the charm of an older house and gain an electrical system that meets the standards of a new one.
Swapping out a century-old electrical system changes how an older home performs, protects, and holds its value.
Aging insulation, buried splices, and overheating under modern insulation are the main hazards of knob-and-tube wiring. Replacing it with grounded copper circuits removes those failure points and brings genuine peace of mind to an older home.
Many insurers in California refuse to cover homes with active knob-and-tube wiring, or they charge a steep premium for it. A documented knob-and-tube wiring replacement often clears that hurdle and opens up better coverage options.
New wiring brings the grounded, three-prong outlets and code-required AFCI and GFCI protection that the original system never had. Your electronics, appliances, and everyday devices finally have the protection they were designed to use.
Once the knob-and-tube is gone, you can insulate attics and walls properly and move ahead with remodeling plans. The old wiring no longer dictates what you can do with your own home.
Active knob-and-tube wiring is a frequent deal-breaker during home sales in Santa Cruz County. Replacing it ahead of time clears a major inspection concern and makes the property more appealing to buyers.
Knob-and-tube replacement is one path to a safer electrical system. Depending on what we find in your home, one of these related services may suit the project better.
When aging wiring runs through the whole house rather than a few circuits, whole-home rewiring replaces all of it in one coordinated project and leaves the home on a single modern, grounded system.
Some houses from the late 1960s and early 1970s were wired with aluminum instead of knob-and-tube. Aluminum wiring replacement tackles the overheating and loosening that aluminum connections tend to develop over the years.
Electrical rewiring addresses wiring problems at any scale, whether a home needs a handful of updated circuits or a complete replacement. The plan follows the house rather than a fixed package.
Working in a hundred-year-old house calls for a different touch than wiring new construction, and that is where our experience shows.
Knob-and-tube replacement cannot be rushed without cutting corners. We move at the pace the work demands, tracing each run and protecting the structure so the job gets done thoroughly the first time.
Keaton Mayers learned the trade at a high level before starting KM Electric, and he brings that standard to historic homes. The crew handles old wiring with the care it takes to keep both the house and its occupants safe.
Older homes in this area have details worth preserving. We plan our routes and access points to limit damage to plaster, trim, and woodwork, then leave the space ready for finishing.
We regularly work on the early-1900s homes found in Santa Cruz, Capitola, and the mountain communities of the San Lorenzo Valley. That background helps us anticipate what we will find before the walls ever open.
We explain what is live, what has to go, and what it will take, without overselling the scope. Homeowners share their experience in our Yelp and Google reviews, which speak to the way we handle these projects.
Look for ceramic knobs and tubes in the attic or basement, two-prong outlets, and the absence of a ground wire at receptacles. Many homes in Felton and Ben Lomond carry a mix of old and updated circuits, so a thorough inspection is the only way to know for certain what is still live.
Existing knob-and-tube wiring is not automatically illegal, but it cannot be extended, and any new work must meet current code. Most insurers and lenders treat active knob-and-tube as a liability, which is why replacement is usually the practical choice.
In most cases, yes. We use targeted access points and plan routes that limit openings in walls and ceilings. Full demolition is rarely necessary, even in the older homes common around Santa Cruz.
Insurers see active knob-and-tube as a higher fire risk, so many decline coverage or raise premiums when it is present. A documented replacement from a licensed electrician usually satisfies their requirements.
Timelines depend on how much of the original wiring remains and how accessible it is. A partial replacement may take a few days, while a home wired entirely in knob-and-tube can take a couple of weeks. We provide a schedule after assessing the property.
Knob-and-tube wiring rarely gives much warning before it becomes a problem. KM Electric provides virtual estimates for knob-and-tube wiring replacement across Scotts Valley and Santa Cruz County, and financing is available to make the project manageable. Call 831-566-2838 or schedule a consultation to have your system assessed.
Business Name: KM Electric
Address: 5042 Scotts Valley Unit F, Scotts Valley, CA 95066
Phone: 831-566-2838
Business Hours:
Mon - Fri: 7:00 AM to 5:00 PM
Sat-Sun: Closed
Financing Available
20-year Workmanship Warranty