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Electrical Code for Bonding Ground Wires

How to Splice Electrical Wires and the Ground: For projects where you are extending the wiring of an existing circuit then the additional wire size must match that of the circuit you are branching from or splicing. Electrical junction box splices can be made safely when you understand the method.

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NEC Code and Bonding Ground Wires
Electrical Question: I believe I read in the NEC that you should never bond different sized wires together (e.g. never bond a 14-gauge wire into a 12-gauge circuit.
Why?

This electrical wiring question came from: Gary, a Handyman from Lake Worth, Florida.
Additional Comments: Very useful resource.

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

How to Splice Electrical Wires and the Ground

  1. The NEC Electrical Code that you may be referring to does not apply to your electrical wiring application.
  2. Yes – you can splice a 14 gauge ground wire from a light fixture to a #12 gauge ground wire in the light fixture junction box.
  3. For projects where you are extending the wiring of an existing circuit then the additional wire size must match that of the circuit you are branching from or splicing.
  4. Be sure to use the right size wire connector for the wire gauges and number of wires that will be spliced.

Splicing Electrical Wires
electrical-splice-box

Electrical Junction Box Splice

Electrical junction box splices can be made safely when you understand the method. This example will show you how its done step by step and shows how to make a junction box splice and the related electrical codes.

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NEC Codes for Home Electrical Wiring
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The Safest Way to Test Electrical Devices and Identify Electric Wires!

The Non-Contact Electrical Tester
This is a testing tool that I have had in my personal electrical tool pouch for years, and is the first test tool I grab to help identify electrical wiring. It is a Non-contact tester that I use to easily Detect Voltage in Cables, Cords, Circuit Breakers, Lighting Fixtures, Switches, Outlets and Wires. Simply insert the end of the tester into an outlet, lamp socket, or hold the end of the tester against the wire you wish to test. Very handy and easy to use.

The Quickest Way to Check for Faulty Electrical Wiring!

The Plug-In Outlet Tester
This is the first tool I grab to troubleshoot a problem with outlet circuit wiring. This popular tester is also used by most inspectors to test for power and check the polarity of circuit wiring.
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The Wire Stripper and Wire Cutter
My absolute favorite wire stripping tool that I have had in my personal electrical tool pouch for years, and this is the tool I use to safely strip electrical wires.
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