Knob and Tube Wiring

Many Homes in Toronto have Knob and Tube Wiring….What is is exactly?

Knob and Tube Wiring

This is what Knob and Tube Wiring Looks like.

Homes built prior to 1950, used a system called ‘Knob and Tube’ Wiring.  Today, although its technology is old, it is still capable of carrying electricity through a Home.

What is Knob and Tube Wiring?

It is a system that uses Porcelain Insulators called Knobs, for running wires through unobstructed spaces.  The Tubes protect wires that run through Studs and Joists in a house.   It was designed to let heat dissipate to the surrounding air. 

Today’s Wiring

Most Homes with Knob and Tube Wiring may not have the electrical capacity to meet today’s needs.  Most Toronto Residential Properties have a “Ground Wire” and 3-prong outlet that adds an extra measure of safety. 

Home Insurance

As the existing Knob and Tube wiring gets older, Insurance Companies may deny coverage due to the increased risk.  Some Insurance Companies may not write new policies on homes unless they have assurance that an Qualified Electrician will upgrade the new wiring system within a specified time frame. Just make sure you have your Knob and Tube Wiring checked by a Qualified Electrician and / or by the Electrical Safety Authority.