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What is Knob and Tube Wiring?

The oldest electrical wiring still in existence today within Winnipeg homes is named knob and tube wiring. Knob and tube wiring was primarily used up until the 1950's. Thus older homes in Ontario for example in Rosedale probably contain some knob and tube wiring. Knob and Tube Wiring consists of Ceramic Knobs, Ceramic Tubes and Wiring (hence as the name implies). The knobs are nailed or screwed into wall studs and floor/ceiling joists to support individual wire along the run. The tubes are used when the wire run passes through studs and joists. Only 2 types of wire is used, a hot and a neutral. The ground wire to prevent electrical shock is not present. Sometimes a proper electrical box was not used at the switch, receptacle or light.

Is Knob & Tube Wiring Safe?

Do you know how your home's electrical has been maintained or upgraded? Most older homes had 30 or 60 amp services, which are hardly adequate for today's home electrical needs. The problems with knob and tube wiring are associated with the age of the electrical system, its maintenance and how upgrades and changes have been accomplished. These Knob and Tube electrical systems are expired, deteriorated, tampered with, ungrounded, overloaded and therefore are high risk for shock and fire. This makes the knob and tube wiring circuit potentially unsafe for shock or electrical short. It only has to happen once to realize its full impact.

Why Replace Knob & Tube Wiring?

There are Knob and Tube Wiring problems within older Winnipeg homes. With increased modern energy draws, these wires may overheat. Remember, this system was used between 1900 to 1950 when very few people even had a TV. (Now look at us) The rubber and cloth insulation around the knob and tube wiring breaks down over time creating a potential for an electrical short. Often, we see the electrical connection at the light simply taped together and pushed up into the attic insulation. Homes built in this time period used sawdust as an insulator - perfect recipe for a fire.

  1. There are some clear safety concerns with this type of electrical system. What make it even more difficult is that a lot of the knob and tube wiring is behind finished walls and ceilings. This make is very difficult if not impossible to fully inspect. Usually home inspectors will look to see if a plug or light is working. Unless they have x-ray machines, they can't see behind finished walls and ceilings. Sometimes new wiring is used in visible areas and "spliced" into the knob and tube wiring up in the wall cavity. Another handyman special.

The Home Insurance Question.

Some older Winnipeg homes had these knob and tube wiring systems incorrectly tampered with (aka handyman special) as the electrical needs of the home-owners increased over time. These modifications to the knob and tube system, in some cases, have been done in an unsafe manner by a unqualified person thus creating more risk for the current home-owner. When risk is increased, Winnipeg insurance companies will charge more and have started to even deny coverage if your home contains knob and tube wiring. Lenders also are starting to see the risk too and may decide not to lend.

What Should You Do?

  1. Call Eddie at (647) 857-3987. Eddie is Master Electrician with over 30 years in residential and commercial electrical. Glen specializes in Knob & Tube AND Aluminium Wiring replacement. In Winnipeg and area, if you’re looking for a knob and tube wiring replacement estimate or the actual knob and tube wiring replacement call Eddie today.When you need knob and tube electrical wiring replacement in Winnipeg demand the expert installation that clean and mlean Electric



is known for.

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