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Knob and Tube Wiring and GFCI


By Dave Rongey - Summary:

How to Add a GFCI Outlet to Knob and Tube Wiring or a 2 Wire Outlet: Identify the Polarity of the Circuit Wiring, Wiring the GFCI Outlet, Adding a Ground Wire to the GFCI Outlet

Guide for Adding a GFCI Outlet to Knob and Tube Wiring

Electrical Question: I am working on Mother’s Bathroom electrical wiring  in an 1910 vintage home.

This electrical wiring question came from: Steve, a Handyman from Niles, Ohio.

Dave’s Reply:
Thanks for your electrical wiring question Steve.

How to Add a GFCI Outlet to Knob and Tube Wiring

Skill Level: Intermediate to Advanced – Best performed by a Licensed Electrician..
Tools Required: Basic Electricians Pouch Hand Tools and Voltage Tester or Non-Contact Voltage Tester.
Estimated Time: Depends on the personal level experience and ability to work with tools and access to the wiring.
Precaution: Identify the circuit, turn it OFF and then Tag it with a Note before performing any wiring.
Notice: Installing additional electrical wiring should be done with a permit and inspected.

Instructions for Wiring a GFCI Outlet for Knob and Tube and 2-Wire Circuit

The Following Resources will assist you with this Electrical Question:

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Complete listing of electrical wire types and parts used for home projects with electrical code information serves as selection guidelines.

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Learn How to Wire it Right with my
Complete Guide to Home Electrical Wiring
Perfect for Homeowners, Students,
Handyman, Handywomen, and Electricians
Includes:
Wiring GFCI Outlets
Wiring Home Electrical Circuits
120 Volt and 240 Volt Outlet Circuits
Wiring 3-Wire and 4-Wire Electric Range
Wiring 3-Wire and 4-Wire Dryer Cord and Dryer Outlet
How to Troubleshoot and Repair Electrical Wiring
Wiring Methods for Upgrading Electrical Wiring
Electrical Codes for Home Electrical Wiring
....and much more.

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One Response to “Knob and Tube Wiring and GFCI”
  1. Dave says:

    installing new circuits in a kitchen using romex wiring, the orginal wiring is knob & tubing. What is the correct way to disconnect knob & tube wiring to the old receptacles?
    Thanks for your professional option