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Electrical Wire and Cable

Replacing a Light Switch and Changing the Wiring

By Dave Rongey - Summary:

How do I connect the wires when replacing my light switches? How to Replace a Light Switch and Make the Wiring Connections, Identifying the Wiring, Connecting the Wiring for Your New Switch.

Wiring Light Switches

Electrical Question: How do I connect the wires when replacing my light switches?
I need to replace a single light switch, but when I pulled the old switch out of the wall here is what I discovered:

Thanks in advance for any help you can provide.
This home electrical wiring question came from: Dina, a Homeowner from Baltimore, Maryland.

Dave’s Reply:
Thanks for your electric wiring question Dina.

How to Replace a Light Switch and Make the Wiring Connections

Application: Wiring for a Light Switch.
Skill Level: Beginner to Intermediate – Best performed by a Licensed Electrical Contractor.
Tools Required: Basic Electricians Pouch Hand Tools and Voltage Tester.
Estimated Time: Depends on personal level experience and ability to work with tools.
Precaution: Identify the light circuit, turn it OFF and  Tag it with a Note before working with the wiring.
Notice: Installing additional electrical wiring should be done according to local and national electrical codes with a permit and be inspected.

Electrical Wiring for Light Switches

Identifying the Electrical Wires When Replacing a Light Switch

When Connecting the Wiring for Your New Switch, this is what I Recommend:

Electrical Wiring Abbreviations and Terms about Light Switch Wiring

More about Wiring Light Switches

Light Switch Wiring
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