How to Splice Your Home’s Knob and Tube Wiring

How to Splice Your Home's Knob and Tube Wiring

What is Knob and Tube Wiring?

Knob and tube wiring was an early method of electrical wiring used in homes in the United States from about 1880 to the 1940s. It consists of separate hot and neutral wires that are not bundled together like modern wiring. The hot and neutral wires are supported on porcelain knobs and run through porcelain tubes across open spaces.

Some key characteristics of knob and tube wiring:

Dangers and Issues with Knob and Tube Wiring

There are several important problems that can occur with old knob and tube wiring:

Options for Replacing Knob and Tube Wiring

If your home has knob and tube wiring, one of the following options should be considered:

How to Splice into Knob and Tube Wiring

If you need to splice into existing knob and tube wiring to add connections or tap power, follow these important steps:

Be very careful working around old wiring! Consider having an electrician handle any major new wiring.