How to Safely Replace Your Old Knob and Tube Wiring

How to Safely Replace Your Old Knob and Tube Wiring


Replacing old knob and tube wiring in your home can significantly improve safety and allow you to upgrade to modern electrical capacity. However, working with electrical wiring can be extremely dangerous if proper precautions are not taken. In this guide, I will walk you through the complete process of safely replacing knob and tube wiring, from planning and preparation to wiring methods and best practices.

Dangers of Knob and Tube Wiring

Knob and tube wiring was commonly installed in homes built before the 1950s. This outdated wiring system presents several safety hazards:

Replacing knob and tube wiring as soon as possible greatly reduces these risks and prevents potential tragedy. The project does require working carefully around live electrical wires, so safety should be your top priority.

Preparing for a Rewiring Project

Careful planning and preparation will ensure your wiring project goes smoothly and safely. Here are some important steps to take before replacing knob and tube wiring:

Assess Scope of Work

Hire a Licensed Electrician

Purchase Materials and Shut Off Power

Safe Wiring Methods

Your electrician should adhere to the following safe wiring methods throughout the rewiring process:

Install New Conduits

Run Copper Wiring

Update Electrical Boxes

Label New Circuits

Final Safety Checks and Closeout

Before closing up finished walls, the electrician should complete several safety checks and closeout tasks:

Finally, have the completed work thoroughly inspected by your local building department to receive an approved final permit. Only operate the new wiring after successfully passing inspection.

Replacing antique knob and tube wiring requires care, expertise, and adherence to safety standards. But eliminating the fire and shock risks of old wiring greatly improves the safety of your home and everyone in it. Stay diligent throughout the project planning and rewiring process to protect your most valuable investment - your home and family.