Replacing knob-and-tube wiring and upgrading to modern, more conventional, 100% copper wiring is often necessary and almost always a good idea. Why? Back in the day, knob-and-tube wiring was the standard practice for electricians installing residential wiring and circuitry. What has happened over time, however, is that the knob-and-tube wiring in vintage homes in Toronto suffers from wear and tear. The covering has dried out, cracked and/r crumbled – even chewed on by rodents. That means it’s nearing the end if its useful life.
Modern appliances & fixtures require that a bonding wire be connected to the outlets. Knob-and-tube wiring systems are missing this. If you have such a system, it’s time for an upgrade to 100% copper wire.