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Smart Light Switch Wire Connections

I am trying to connect a smart light switch. The existing switch only has two black wires connected to it, which i assume are the line and load wire.


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Wiring a Smart Light Switch

Electrical Question: I am trying to connect a smart light switch. The existing switch only has two black wires connected to it, which i assume are the line and load wire.

How to Wire Light Switch

Dave’s Reply:

I am trying to connect a TP-Llink smart light switch. the existing switch only has two black wires connected to it, which I assume are the line and load wire. the new switch has 4 wires, which all need to be connected – line, load, neutral and ground. pretty straight forward, or so I thought.

I pulled all of the wires out of the switch box to locate the neutral and ground wires and found a bundle of ground wires and another bundle of neutral wires clamped together (please see photo). In my limited experience, I have never seen this before. Would I be able to separate one ground and one neutral wire and connect them to the switch?

Thank you!

This electrical wiring question came from Jeff in Honolulu, Hawaii.

Dave’s Reply:

Thanks for your electrical wiring question Jeff.

How to Wire a Smart Light Switch

Application: How to Wire a Smart Light Switch.
Skill Level: Intermediate to Advanced – Best performed by a Licensed Electrical Contractor, or Certified Electrician.
Electrical Tools Required: Basic Electricians Pouch Hand Tools, Voltage Tester, and appropriate Safety Gear.
Estimated Time: Depends on the personal level experience, ability to work with tools, install electrical circuit wiring, and the available access to the project area.
Electrical Safety: Identify the electrical power source to the Light Switch, turn it OFF and Tag with a Note before working with the electrical wiring.
Electrical Wiring Parts and Materials: Electrical parts and materials for the Light Switch should be approved for the specific project and compliant with local and national electrical codes.
Electrical Codes and Inspections: Installing or changing home electrical wiring should be done according to local and national electrical codes as adopted in your specific area of Hawaii. A permit and inspections may also be required.

Wire a TP-Link Smart Light Switch in a Garage

This electrical wiring project is about wiring a smart light switch in the garage of a old house.
electrical-wiring

Light Switch How to Wire

From what you have described, and looking at the photo, the home wiring has been installed and crimp connectors have been used for the spliced connections, and this is typical for many older homes.
Here’s what I typically do in a situation like this: Turn off the circuit power. An additional wire may be added to the group of ground wires as they are now, just trim the ends of the wires evenly and add one more wire, then twist the group together and install a twist on wire connector.
The group of neutrals will either have to have the crimp connector removed, or the group of wires may be cut just below the crimp, then strip back the insulation, add an additional white wire, twist together, and install a twist on connector. This will provide you with all the wires you need, including the switch wires, to wire up the TP-Link Smart Switch

More about How to Wire a Light Switch

How to Wire a Switch
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Wiring a Light Switch – Diagram 1

Wiring Diagrams
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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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Sub-Panel Electrical Wiring for the Home

Electrical sub-panel wiring considerations for the home complete with pictures. Careful planning for your Sub-Panel with immediate and future load considerations will help you understand how to size your Sub-Panel. This information will help as you consider a Sub-Panel and its size.

Electrical Boxes for Electric Repairs and Home Wiring Projects
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Electrical Junction Boxes for Home Wiring

Understanding electrical junction boxes and what they are used for. Home electrical wiring is the process of installing electrical wire to a location that will serve electrical devices or an appliance. One very important component is the box where the wire will be installed. The type and size of the home wiring electrical boxes will depend upon the circuit size, application and its location.

How to Install Garage Electrical Wiring
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Garage Electrical Wiring

Fully Explained Photos and Wiring Diagrams for Garage Electrical Wiring with Code Requirements for most new or remodel projects.

Electrical Grounding and Ground Wires
Electrical Grounding Methods and Requirements

Electrical Grounding Methods and Requirements

Listing of electrical codes for grounding with examples of electrical grounding codes for home electrical wiring.


The following may also be helpful for you:

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Wire a GFCI Outlet without a Ground Wire

NOTE: A List of All my Helpful Videos
Will Display at the End of This Video
So Keep Watching So I Can Help You Wire it Right!
Check out my YouTube Channel, and Subscribe!

See All My Videos Here!

Learn more about Home Electrical Wiring
with my online Video Course:
Basic Home Electrical Wiring by Example

Dave's Guide to Home Electrical Wiring:

» You Can Avoid Costly Mistakes! «

Here's How to Do It:
Wire It Right with the help of my Illustrated Wiring Book

Great for any Home Wiring Project.
  electrical wiring  

Complete Guide to Home Electrical Wiring

Perfect for Homeowners, Students,
Handyman, Handy Women, and Electricians
Includes:
Wiring GFCI Outlets
Wiring Home Electric Circuits
120 Volt and 240 Volt Outlet Circuits
Wiring Light Switches
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
NEC Codes for Home Electrical Wiring
....and much more.



Be Careful and Be Safe - Never Work on Energized Circuits!
Consult your Local Building Department about Permits and Inspections for all Electric Wiring Projects.

Electrical Tips to Help You Wire it Right

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.
It detects probable improper wiring conditions in standard 110-125 VAC outlets Provides 6 probable wiring conditions that are quick and easy to read for ultimate efficiency Lights indicate if wiring is correct and indicator light chart is included Tests standard 3-wire outlets UL Listed Light indicates if wiring is incorrect Very handy and easy to use.

Strip Off Wire Insulation without Nicking and Damaging the Electric Wire!

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.
This handy tool has multiple uses:
The wire gauges are shown on the side of the tool so you know which slot to use for stripping insulation.
The end of the tool can be used to grip and bend wire which is handy for attaching wire onto the screw terminals of switches and outlets..

The wire stripper will work on both solid and stranded wire. This tool is Very Handy and Easy to Use.


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