Rewiring a 100 year old home can be a daunting task, especially when dealing with outdated and potentially hazardous knob and tube wiring. As a homeowner, I have learned that with proper planning, safety precautions, and step-by-step execution, I can successfully rewire my vintage home. In this comprehensive guide, I will walk through all the key steps and considerations for replacing knob and tube wiring with modern, up-to-code electrical systems.

Dangers of Knob and Tube Wiring

Before beginning any rewiring project, it's crucial to understand the risks of outdated electrical systems like knob and tube. This early form of electrical wiring, common in homes built before 1950, has significant safety issues:

I cannot stress enough that knob and tube wiring poses a serious danger in an old home. Replacing it should be a top priority project.

Pre-Rewire Inspection

Before developing a rewiring plan, I need to thoroughly inspect my home's existing electrical system. Here are key investigation steps:

This inspection provides crucial information for developing my rewiring plan. I don't want any surprises once I start the removal process.

Developing a Rewiring Plan

With inspection complete, I can now strategize my rewiring approach:

Rewiring an old home takes foresight. A detailed plan minimizes delays and code violations once the work begins. I always have my plan inspected before pulling the first wire.

Removing Knob and Tube Wiring

With my new circuit plan approved, I can start the hazardous process of removing outdated wiring:

Work slowly and methodically. Overlooking a single live wire could cause a major safety hazard once new wiring is installed. Be vigilant!

Installing New Wiring

With the old wiring removed, I can focus on installing modern replacement circuits:

Getting new wires in place is tedious but rewarding work. Go slowly to ensure safety and code compliance.

Hiring an Electrician

While a skilled DIYer can potentially rewire their own vintage home, I strongly advise hiring a licensed electrician, especially for:

Don't risk safety or code violations on your rewiring project. Hire a pro for items beyond your skill level.

Safety First!

Finally, I can't stress enough that safety is paramount when rewiring an old home. Potential hazards include:

Take your time and exercise extreme caution. The risk is not worth the reward when it comes to household electrical work. If in doubt, call an electrician.


Rewiring a 100 year old home with knob and tube wiring is a major project, but very worthwhile for safety. With proper planning, safety precautions, and help from a professional electrician, I can successfully rewire my old house. While challenging, I'll gain the peace of mind and added property value that modern electrical systems provide. Stay safe and be meticulous when reviving your vintage home!