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Knob & Tube Wiring Removal

The Shock Doctors are specialists in knob and tube wiring; caring for these elegant and stately homes with skill, patience and expertise. When The Shock Doctors complete a knob and tube repair, the home has all the character of its era, and all the convenience and safety of a new home.

For the home owner, this means a minimum of household disruption, and most importantly, circumvents any unneeded damage to the home’s walls, ceilings, floors and baseboards.

Because most older homes have a mixture of knob and tube and other wiring materials, it is important to have a careful electrical inspection and assessment so you have all your options available before you proceed.

A SITE VISIT BY ONE OF OUR PROFESSIONAL ELECTRICIANS WILL PROVIDE YOU WITH A FULL INSPECTION AND ALL THE OPTIONS AVAILABLE TO MAKE YOUR HOME SAFE.

Knob & Tube Wiring Removal

Knob & Tube Wiring Removal

Knob & Tube Wiring is the oldest method of wiring a home —cloth-covered wires are connected with porcelain knobs to secure the wires in place. Wherever the wire passes through a stud or joist, holes are drilled and fitted with porcelain tubes; the wire is threaded through these tubes to prevent them from touching the wood; thus the name — Knob & Tube Wiring.

Is Knob & Tube Wiring Safe?

Knob and tube wiring is NOT safe — for a number of reasons:

  1. It is between 70 – 110 years old. It is worn out. The porcelain knobs and tubes crack or break, old wires sag and fray, and the sheathing turns brittle and falls off, exposing the live wires.
  2. Most homes that were originally knob and tube wiring now have a dangerous combination of knob and tube and modern wiring. The most dangerous problems with knob and tube wiring are caused by trying to add additional wiring to the original system.
  3. Knob and tube wiring is an UNGROUNDED system which is completely unacceptable by today’s standards.
  4. Knob and tube wiring is designed to be strung through open air so the heat can dissipate well. Improved insulation techniques create hazards as loose-fill insulation blown into the attics and walls of older houses will come into contact with the wires creating a serious fire hazard.
  5. Modern appliance plugs get modified in order to make them compatible with the old and outdated 2 prong receptacles
  6. Vastly higher electrical demand causes overuse of extension cords and power bars.
  7. Modern living requires more power than the old system was intended to supply.

The Best Solution to Fix Knob and Tube Wiring

Should include:

  • Removing the old Knob & Tube wiring and replacing the entire system with new copper wiring to meet today’s Electrical Safety Code Authority standards
  • Upgrading to at least a 100 amp service (required by most insurance companies)
  • Proper grounding and bonding (essential)
  • Replacing the old ungrounded switches and receptacles with CSA approved devices.
  • Interconnected Smoke and CO detectors

With care and skill, a beautiful old home CAN be rewired without demolition and major damage. The beauty and charm of a heritage home can remain intact but have the safety features and improved appraisal value of modern wiring.

Getting Insurance On Knob and Tube Wiring

Knob and Tube Wiring

Knob and Tube Wiring

All insurance companies view this wiring method as a serious safety hazard and most require an insurance inspection before a policy is issued. The insurance inspection must be submitted by a certified electrical contractor before a home-owner’s policy is issued or renewed. Some insurance companies and the ESA will allow upgrading of the receptacles to GFCI protection when re-wiring is not an option. Although this method is not optimal, it does at least provide some protection from faulty electrical equipment.

At “The Shock Doctors“ we have sourced reasonable financing options for upgrades of this nature. Our clients are often pleasantly surprised at how affordable upgrades of this nature can be when it is reduced to a manageable monthly investment.

Call us at 1-877-646-7440 or email us at info@theshockdoctors.ca to book a comprehensive, no obligation assessment.


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" Great Work. We feel safe now that we are up to code compliance. Very good clean up :) "

- Allan & Lynne Scott, Orillia, ON, February 2017

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