How to Replace Your Home's Outdated Knob and Tube Wiring


Knob and tube wiring was commonly installed in homes built before the 1950s. While it was suitable at the time, this old wiring system can be dangerous by today's electrical standards. Replacing knob and tube wiring with modern wiring improves safety and allows your home's electrical system to meet the demands of contemporary devices and appliances. This article provides a step-by-step guide to replacing outdated knob and tube wiring in your home.

Dangers of Knob and Tube Wiring

Knob and tube wiring consists of individual wires that are separated by ceramic knobs and run through hollow tubes. There are several concerns with this old wiring method:

For safety and functionality, it is highly recommended to completely replace knob and tube wiring.

Preparing for the Rewiring Project

Replacing your home's electrical wiring is a major project that requires planning and preparation:

Careful planning and preparation will ensure your wiring replacement project goes smoothly and safely.

Hiring an Electrician

It is highly recommended to hire a professional, licensed electrician for any knob and tube wiring replacement project. Some tips when hiring an electrician:

Taking the time to hire the right electrician will provide peace of mind knowing your wiring project will be handled professionally.

The Rewiring Process

The process for rewiring a home generally involves the following main steps:

1. Full Inspection of Existing Wiring

2. Garage & Exterior Rewiring

3. Main Electrical Panel Upgrade

4. Running New Wires

5. Outlet & Light Installation

6. Wall Repair

7. Cleanup & Inspection

The rewiring steps may vary slightly depending on your home’s specifics. Close communication with your electrician is key throughout the process.

Why Complete Replacement is Best

When rewiring because of old knob and tube wiring, attempting to only replace certain sections is not advisable. There are several benefits to a complete rewiring:

Doing a full replacement of knob and tube wiring maximizes safety, functionality, and long-term value for your home.

Summary of the Rewiring Process

Replacing outdated, potentially dangerous knob and tube wiring involves careful planning and hiring professional electricians. The full process includes:

Completely rewiring maximizes safety and electrical capacity. While wiring replacement involves significant costs, the value it adds to your home makes it a smart long-term investment.