Introduction

Knob and tube wiring was commonly installed in homes built before 1950. This old type of electrical wiring can be dangerous due to lack of grounding, overloaded circuits, and deterioration of insulation over time. Replacing knob and tube wiring with modern wiring greatly improves electrical safety. This article provides a complete, in-depth guide on how to replace knob and tube wiring yourself.

Dangers of Knob and Tube Wiring

Knob and tube wiring has three main dangers that make replacement necessary:

Lack of Grounding

Overloaded Circuits

Deteriorating Insulation

When to Replace Knob and Tube Wiring

Here are some signs it's time to replace knob and tube wiring:

Safety should be the #1 consideration in maintaining old electrical systems. It's smart to replace knob and tube wiring before problems arise.

Preparing for the Replacement Project

Replacing knob and tube wiring is a big project that requires planning and preparation:

Hire a Licensed Electrician

Get Required Permits

Have Utilities Shut Off

Remove or Protect Belongings

Replacing Knob and Tube Wiring: Step-by-Step

With proper planning and safety precautions, a licensed electrician can methodically replace knob and tube wiring:

1. Turn Off Electrical Power

2. Remove Old Wiring

3. Install New Wiring System

4. Replace Devices and Fixtures

5. Inspect and Test

6. Insulate and Patch

Cost to Replace Knob and Tube Wiring

The cost for rewiring a whole house averages $8,000 to $15,000 but can be higher depending on:

Upgrading electrical service for the home may add $2,000 to $4,000 more to the overall costs.

It's a large investment that greatly improves home safety and functionality for decades to come. Homeowners should view rewiring as a necessary upgrade, like replacing an old roof or HVAC system.

Improved Electrical Safety

Replacing outdated knob and tube wiring with modern wiring provides:

Home electrical systems should keep pace with modern needs and safety standards. Taking on the project of rewiring now provides peace of mind that your home's electrical system is safe and sufficient for your family's needs.