How to Safely Replace Old Knob and Tube Wiring in Your Home

How to Safely Replace Old Knob and Tube Wiring in Your Home


Replacing old knob and tube wiring in your home can seem like a daunting task, but it is doable if you take the proper safety precautions. Knob and tube wiring was commonly installed in homes built before the 1940s and can pose safety hazards like overloaded circuits and fire risks. In this article, I will walk you through the complete process of how to safely update your outdated electrical system.

Dangers of Knob and Tube Wiring

Knob and tube wiring consists of single black rubber-insulated wires run through ceramic knobs and tubes. It has no ground wire and often not enough amperage for modern household needs. Here are some of the main dangers:

The bottom line: knob and tube wiring cannot safely support the electrical demands of modern life. Replacement should be a top priority.

Planning Your Wiring Replacement Project

Before beginning work, take time to carefully plan the project. Rushing in without proper planning can not only produce poor results but also create new hazards.

Evaluate scope of work

Hire a qualified electrician

Obtain required permits

Safety planning

How to Replace Knob and Tube Wiring

Once planning is complete, you are ready to safely remove the old wiring and install new. Proceed in steps:

1. Turn off power and disconnect knob and tube circuits

2. Remove knob and tube wiring

3. Install new wiring system

4. Replace/install devices and covers

5. Inspect and test completed system

Work Safely! Key Tips to Remember

Replacing knob and tube wiring requires care and attention to detail, but modernizing the electrical system in my home was very worthwhile. The sense of security and safety is priceless, not to mention finally having adequate capacity for all my home's circuits. If planned carefully and executed safely, you can successfully tackle this project too!