Knob & Tube Rewiring

Unless you reside in a building or house constructed before the 1950s, you most likely don’t have to worry about things like knob and tube electrical wiring. It would even be fair to say that knob and tube wiring is more or less a thing of the past. In most cases, people’s energy needs just aren’t the same due to technological improvements, which is why we have safer, more efficient alternatives.

That said, there still are plenty of buildings where knob and tube wiring is prevalent. If you also live somewhere with this type of wiring, there is a good chance that you will need to replace the knob and tube wiring and Kato Electrical is ready to provide you the best service.

We will take a close look at what knob and tube wiring is and how it works.

How Knob and Tube Wiring Works

Knob and tube wiring contains copper wiring (neutral and hot) run through tubes and knobs made out of porcelain. The wires are held in place with the help of knobs, generally in contact with various components like wooden beams and other parts of the house. On the other hand, the tubes shield the wire from coming in contact with drywall, wood, or any other thing capable of starting a fire due to overheating.

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Generally Present in Older Buildings

You’d be surprised to learn that people considered knob and tube wiring innovative technology in the 19th and 20th centuries. The setup was incredibly cost-effective, helping people meet their day-to-day energy needs during that era. That said, this type of wiring did have some drawbacks, so much so that people still consider them to be massive safety hazards. For instance, the wires insulation is not durable and can wear off easily, exposing the wires to various unfavorable elements.

Do Not Use Thermal Insulation

Using thermal insulation to cover knob and tube wiring is a big no-no. Why? Because it is a massive fire hazard and can wreck havoc in your building. In addition, covering this type of wiring with thermal insulation is a violation according to of the National Electrical Code. One of the main reasons why you should steer clear from thermal insulation is that it prevents the porcelain knobs from cooling off.

It’s also worth keeping in mind that the wiring’s switches are generally on neutral wires rather than hot wires. If you live in a house with knob and tube wiring, consider getting a licensed electrician in Vancouver to replace it with safer, modern electrical wiring.

You are Safe with our Certified Electricians

The cost to replace knob and tube wiring varies from building to building, Talk to our experts to get a free estimate for your house or office’s rewiring. Once you do, a licensed electrician in Vancouver will take care of all your rewiring needs.


For more information about our services or to obtain a FREE ESTIMATE, use our form or call 604-417-4785 today!