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Electrical Wire and Cable

Timers and Light Switch Wiring

I’m trying to replace a single pole light switch with a timer light switch in a box that also has another single pole switch going to another light: How to Wire a Timer Switch for Lighting.

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Home Automation and Light Switch Wiring
Electrical Question: I’m trying to replace a single pole light switch with a timer light switch in a box that also has another single pole switch going to another light.

Background: John, a Homeowner from Langhorne, Pennsylvania.

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

Wiring a Timer Switch to Control Lighting

Application: Wiring a Timer Control Switch.
Skill Level: Intermediate to Advanced. This electrical project is best performed by a Licensed Electrician.
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 timer switch wiring.
Notice: Installing additional fixture wiring should be done according to local and national electrical codes with a permit and be inspected.
Materials: Make sure the timer switch has the same amperage and voltage rating as the original switch, and is fully compatible with the electrical circuit, the light fixture and the type of light bulbs being used.

How to Wire Timer Switch for Lighting

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Complete Guide to Home Electrical Wiring

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Wiring GFCI Outlets
Wiring Home Electric Circuits
120 Volt and 240 Volt Outlet Circuits
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Be Careful and Be Safe - Never Work on Energized Circuits!
Consult your Local Building Department about Permits and Inspections for all Electric Wiring Projects.

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FAQs Frequently Asked Questions and Comments

4 Responses to “Timers and Light Switch Wiring”
  1. Brian Reed says:

    I have a Greenheck Model GTD #381194 Fan/Light delay off timer toggle switch that I am trying to install in a 3 way application. The directions only show Fan & Light Combination or a Single Load diagram. Can it be installed for 3 way?

  2. Dave Rongey says:

    Hi Brian,
    I searched for the Make and Model number for the combination switch that you are referring to and was unable to locate the information. Brian if the switch has 3-way capabilities it would definitely say so on the box and on the wiring diagram. Most dimmer switches are now made so they can be wired as single switch or as one of the two 3-way switches and this is clearly stated on the packaging.

  3. munusami says:

    Hi Dave, I am Shiva. I need your help how to wire a halogen floodlight sensor.
    Please help me, Thanks
    Regards Shiva

  4. Dave Rongey says:

    Hi Shiva,
    Could you please tell me more about the floodlight and sensor?
    Is this a motion detector type of light fixture that you have?
    I will look for your info,