Three-way Switch Replacement

はじめに

A three-way switch is a common type of light switch that is used in many homes to control a single light fixture from two or more locations. Over time, these switches may become worn or damaged, requiring replacement.

Replacing a three-way switch may seem like a daunting task, but with the right tools and instructions, it can be a simple DIY project. In this guide, we will provide step-by-step instructions on how to replace a three-way switch safely and effectively.

Whether you are a seasoned DIYer or new to home repairs, this guide will give you the confidence and knowledge you need to replace a three-way switch and restore proper functionality to your lighting system.

必要な工具と部品

手順1 Three-way Switch

Three-way Switch Replacement, Three-way Switch: 手順 1、 2の画像 1

Three-way Switch Replacement, Three-way Switch: 手順 1、 2の画像 2

Locate and turn off the circuit breaker for your switch.
Try to turn the switch to ensure you turned the power off.

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手順2

Use the screwdriver to remove the 15mm Flathead screws on the wall plate.
Remove the wall plate from the wall.

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手順3 Determine voltage absence

Three-way Switch Replacement, Determine voltage absence: 手順 3、 2の画像 1

Three-way Switch Replacement, Determine voltage absence: 手順 3、 2の画像 2

While wearing insulated gloves, gently pull out the switch and use a Duspol or any other Voltmeter to test if there is voltage at the contacts.
You can also use a single pole phase tester, but that's not the proper way to do it.
Do not work on live circuits if you are not an experienced professional.

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手順4

Three-way Switch Replacement: 手順 4、 3の画像 3

Label the black live or load wire which connects to the power or the device and usually on the down position of the switch.
Use the screwdriver to loosen the 5mm Phillips #1 screw so that you can remove the live or load wire from the switch.

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手順5

Label the two traveler wires where the up position is held by gold screws of the old switch.

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手順6

Three-way Switch Replacement: 手順 6、 3の画像 3

Use the screwdriver to loosen the 5mm Phillips #1 screws so that you can remove these two traveler wires.
After the wires are removed, disconnect the old switch.

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手順7

You will find there are one or two wires left in the outlet box.
Ground wire is the bare copper wire.
The white one is the neutral wire that may be in another outlet box.
Please label the neutral wire and the ground wire.

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手順8

Three-way Switch Replacement: 手順 8、 3の画像 3

Using your new switch, link two traveler wires to the positions with gold screws of the new switch and tighten the 5mm Phillips #1 screws.
Link the live or load wire to the position with a black screw and tighten the 5mm Phillips #1 screw.
Please ensure you link the wires to the correct places.

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手順9

If there is a green 5mm Phillips #1 screw on the new switch, please link the ground wire to and tighten it.
For the intelligent switch, there would be a green wire so that you can group the ground wire with the green wire and tighten them with a wire nut.

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手順10

There is an extra white wire on the intelligent switch.
Group the neutral wire with the white wire and use the wire nut to tighten them.