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Knob and Tube Rewiring in St. Louis, MO

Many older homes still contain outdated electrical systems that were installed decades ago. If your property has not been updated in many years, it could still be operating with knob and tube wiring. Mr. Electric of St. Louis provides professional knob and tube rewiring in St. Louis, MO, to ensure your system is compliant with today’s modern electrical code and energy demands. Replacing this type of wiring improves safety, ensures compliance with building codes, and supports the devices and appliances you use every day.

Knob and Tube Rewiring in St. Louis, MO
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  • Commonly installed in homes prior to the 1940s, knob and tube wiring was considered effective during its era, providing basic electricity before households were filled with modern appliances. This wiring method relied on ceramic knobs to hold the wires in place and ceramic tubes to shield them whenever they passed through wooden framing.

    Although it was innovative in its time, knob and tube wiring is no longer appropriate for today’s electrical needs. It does not include grounding, which is essential for safely channeling excess electricity. The insulation on the wires can also deteriorate with age, leaving bare wires exposed. Such conditions can lead to your system causing shocks and being susceptible to overheating and dangerous fire risks. In addition, this wiring was not designed to support the heavy loads required by air conditioning systems, kitchen appliances, or electronics. Insurance companies will also typically not cover homes with active knob and tube wiring until it has been replaced.

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Why Replace Knob and Tube Wiring?

The decision to replace knob and tube wiring comes down to safety, functionality, and compliance with modern standards.

One major concern is the lack of grounding. Without a grounding path, excess electrical current has nowhere safe to go, which increases the chances of shocks and fire hazards. The insulation on these wires is another concern. Over time, it can become brittle and crack, exposing wires that may come into contact with wood framing or insulation materials.

Knob and tube wiring also cannot keep up with modern electrical demand. It was designed for a time when homes had only a few light fixtures and small appliances. Today’s homes run air conditioning systems, computers, televisions, refrigerators, and dozens of other devices, all of which require far more capacity than knob and tube systems were built to handle.

Warning signs that your home may still have knob and tube wiring include flickering lights, frequent breaker trips, warm or discolored outlets, and a lack of grounded outlets. If your home has not had a wiring inspection in many years, it is a good idea to schedule one to determine if this outdated system is still present.

  • The process of rewiring a home begins with a thorough inspection of its current electrical system. Our electricians identify areas where knob and tube wiring is active and create a detailed plan for replacement. This typically involves installing modern wiring with proper insulation and grounding, replacing outdated connections, and ensuring all circuits are safe and up to code.

    The replacement process may also include upgrading related components such as outlets and light switches. Once the new wiring is installed, testing confirms that everything is functioning correctly and safely.

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