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How To Replace Knob and Tube Wiring Image
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Knob and Tube Wiring

Knob and Tube Image
Replace Knob and Tube ImageKnob and Tube

Knob and Tube was the standard method of wiring from the late 1800's to the late 1940's. It is a system of individual copper conductors ran in porcelain tubes through joist/studs, and supported by porcelain knobs. One of the major issues with Knob and Tube is that it is an ungrounded electrical system.

Is Knob and Tube Safe?

Knob and Tube has been proven over time to deteriorate. There are several causes for this to occur, movement of any kind being vibration or loose connection of devices. Also just touching it can speed the process up. This is one of the major reasons that this type of wiring should be replaced immediately. Being an ungrounded electrical system is a risk you should not take. The major risk of an ungrounded system is the shock hazard. You could run the risk of livening up devices in your house that require a ground... Don't forget Knob and Tube is over 80 years old, how do your joints work at 80!

Insurance Companies and Knob and Tube Wire: Should it be Removed?

Insurance companies will no longer issue new insurance to a home that is wired with Knob and Tube wiring. It is in your best interest to have this issue resolved as soon as possible. Unfortunately when you are looking to either buy or sell your house this will be one of the major issues to be dealt with. Insurance companies don't want to take risks either. This is why they will no longer insure homes with older wiring. It has been proven that most fires in homes are caused by old or tampered wiring.

Knob and Tube Replacement: Who Should Replace your Knob and Tube Wiring?

Having a home in Ontario, you can only have your knob and tube wiring removed by a provincially licensed electrical contractor. Electricity is complicated and mistakes can happen, and unfortunately when it comes to electricity the mistakes can be very severe. You can save yourself some money, but you can't put a price on safety. Please contact us today for a free estimate.


Just a quick note to say how great the your team was when they wired our hot tub! Their attention to detail was appreciated.

JK - Kitchener

"Serving Cambridge Ontario, Kitchener, Waterloo, KW, Guelph and Hamilton"

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