Knob & Tube Wiring Whole Home Peace of Mind

Preventative maintenance is the key to keeping your home's systems in excellent working order! We'll help you get the longest possible life from your systems and identify any small equipment repairs before they have a chance to turn into larger problems.

Knob & Tube Wiring in Massachusetts

Serving Taunton & Surrounding Communities Since 1944

If you own an older house that was built prior to 1950, you may have a unique type of wiring in your home called knob and tube wiring. This standardized method of wiring consists of wires running through tubes that are inserted into holes in wooden floor joists. The wires are held in place by porcelain knobs that keep them from touching the wood. 

Our team at Cotti-Johnson is fully experienced with this kind of wiring and can assist you if you’re experiencing problems or need something rewired. Our Taunton knob and tube wiring team is backed by decades of experience and understands the complexities of these projects. This type of wiring is no longer used in new homes, yet it doesn’t need to be removed or replaced. However, there are certain precautions and methods that need to be adhered to when dealing with it. Many electrical companies may not be very familiar with how to approach repairs or rewiring projects such as these. We’ve got you covered.

Contact us at (774) 768-5154 to learn more about our knob and tube wiring services in Taunton and the surrounding areas.


  • “Right now all we can think about is using our new AC on those hot summer days!!!!! Thank you, Peter and the Cotti-Johnson team!!!!!”

    Kevin K.
  • “Sam did an awesome job installing backup generator inlet at my house. He was very professional and made sure that I understood how to switch over to generator power when it is needed.”

    Chris C.
  • “His name, I believe, is Tony. He did a terrific job; very fast, thorough; he was extremely polite, he put on his booty over shoes before he came in; he answer all of my questions...He explained what went wrong with my furnace and knew of the problem and fi”

    Jim S.
  • “Patrick and his crew did a great job. Patrick first went through the house with us to confirm the best locations to install the inside units as well as to determine how best aesthetically to locate the necessary exterior conduits.”

    John S.
  • “I can’t say enough about the service we received. We engaged this team to assist with an internet issue we were having and ending up having them assist with wiring for our ductless ac/heating unit in the garage and they also installed a generator.”

    Margaret P.

Common Knob & Tube Wiring Issues

Some problems that can lead to a short circuit or overheating of your knob and tube wiring include:

  • Insulation – It’s important that any insulation be kept away from this type of wiring, as it requires open air space. Close proximity can lead to fires, as the wires give off a lot of heat that builds up when electricity is flowing through.
  • Alterations – Many electrical companies that are not equipped to repair this wiring will take shortcuts or try to make alterations to the wiring. Because this is an old style of wiring, often replacement parts are not easily available, which is why some electricians will provide makeshift fixes.
  • Excessive use – Homes use quite a bit more electricity these days than they did when knob and tube wiring was first installed. This can lead to the wiring system becoming overheated as it struggles to keep up with the demand.
  • Damage – Because knob and tube wiring is exposed, it can be damaged more easily than other wiring.
  • Brittle insulation – This insulation on knob and tube wiring can dry out over time and start to flake off.

It’s important that you hire a professional with a thorough understanding of this type of wiring. Trying to fix it yourself or hiring an inexperienced team could increase the risk of shock or fire.

How Do I Know If I Have Knob and Tube Wiring?

The average American doesn’t think too much about their electrical system… until they have to. Most people don’t realize they might have a different system than the average home. Many homes built before the 1950s have knob and tube wiring. To confirm if you have this system, check your attic or basement for white, ceramic knobs. Electrical wires will snake through the knobs to support the wiring strands and the tubes will protect loose wires.

At Cotti-Johnson, our Taunton electricians have experience working with knob and tube wiring. We have the tools and knowledge to carefully repair and maintain this type of electrical system, something not every electrician can boast. And when you’re ready to upgrade, we’re here to help you do that too!

Got Old Wiring? We Can Help!

You have several options when it comes to electricians in Taunton, but few offer the experience and dedication to quality that you’ll find at Cotti-Johnson. We offer free estimates, same-day service appointments, and discounts for military personnel. There is no problem too big or small for our team, so reach out to us for quality, professional solutions.

Our Taunton knob and tube wiring experts service properties throughout Massachusetts. Contact us at 774-768-5154 today!

Have a Question?

  • Please enter your first name.
  • Please enter your last name.
  • Please enter your phone number.
    This isn't a valid phone number.
  • Please enter your email address.
    This isn't a valid email address.
  • Please enter your address.
  • Please enter your city.
  • Please enter your State.
  • Please enter your Zip Code.
  • Please make a selection.
  • Please enter a message.
We’re Based in Taunton and Serve Eastern Massachusetts, Most of Rhode Island and Cape Cod Areas
With decades of experience, we are humbled to have earned the trust of countless happy customers, and we'd love the opportunity to serve you as well!