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ByDave Rongey © Ask the Electrician 2017 Author, Licensed Electrical Contractor
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Identifying and Repairing Electrical Wiring

How to Identify Junction Box Electrical Wiring. A tester or meter may be used to identify the electrical wiring that may be found in the junction box.


Using a Tester to Identify Electrical Wiring
Electrical Question: I have a ceiling light that has one power wire coming in and three other wires connected.

This electrical question came from: Joel, a Handyman from Kings Mountain, North Carolina.

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

How to Identify Junction Box Electrical Wiring

voltage tester

Skill Level: Intermediate to Advanced
Tools Required: Basic Electricians Pouch Hand Tools and Voltage Tester or Continuity Tester
Estimated Time: Depends on experience and level of problem solving skills.
Precaution: Testing live wires is dangerous and should be done by an experienced individual only. Testing using a continuity tester should only be made after the circuit has been identified and turned OFF and Tagged.

The Process to Identify Electrical Wiring

Testing the Wires

A tester or meter may be used to identify the electrical wiring that may be found in the junction box and it is typical to find the following cable pairs in a fixture box:

The Following will assist you with Electrical Wiring

Light Switch Wiring

Wiring Diagrams

Electrical Wire for the Home

How to Use Electrical Testers


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Learn How to Wire it Right with my
Complete Guide to Home Electrical Wiring
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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.

» Click here to learn more about Home Electrical Wiring «
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