Wiring a 3-Way Switch
A switch that controlled the chandelier in my dining room recently broke. I accidentally purchased a three-way switch instead of a single pole switch. I returned the three-way switch but I wonder if I wasted gas! Could have somehow wired it to work correctly?
BB from Tampa, FL
First, a little background for our readers. Three-way switches are used when a fixture is controlled by more than one switch. A common example would be the switches at the top and bottom of a stairway (or at opposite sides of a room) that control the same overhead fixture. On the other hand, single-pole switches are used when a fixture has a single switch controlling it.
Normally, you wouldn't use a three-way switch for a single-pole application because (1) there are no "on-off" labels on the switch (admittedly a weak argument since the labels are virtually unreadable) and (2) they are a little more expensive. However, in a pinch you can use one IF you wire it correctly.
Three-way switches have four wire terminals. One is for the ground wire... usually indicated by a green "hex-head" screw. The "common" terminal is "differently colored"... usually copper-plated. The other two are what I fondly call the "uncommon" terminals.
To use a three-way switch in place of a single pole switch, connect the wires as follows: 1) Connect the ground wire to the ground terminal on the switch.
Connect either one of the two switch wires to the switch's common terminal. Connect the other switch wire to either of the remaining "uncommon" terminals. Whichever uncommon terminal you choose will determine which switch position is ON and which is OFF. Since vertically mounted wall switches usually are ON in the "up" position, stick to this convention so you don't confuse your visitors... or yourself.
If you were to inadvertently attach both switch wires to the uncommon terminals, heaven would not fall from the sky or fire rain on your head... the switch would just not work! But careless mistakes like this are why only the most conscientious people should do their own electrical work!
It is also interesting to note that some companies are now selling dimmer switches that go both ways... single-pole or three-way. More space on the hardware store's shelves for other goodies! Hallelujah!
Have a small home repair question for THE NATURAL HANDYMAN? Just click here www.naturalhandyman.com/aitikia
For more home repair information, visit NH's growing list of original home repair articles and quality links www.naturalhandyman.com
If this information has been valuable to you, please consider making a small donation to support NH's free service to the home repair community! For more information, please visit our "Friends" page www.naturalhandyman.com/friends
The Natural Handyman Site Directory
- Home Repair Articles www.naturalhandyman.com/iip
- Home Repair Links Library www.naturalhandyman.com/linkslibrary
- NH's Bookshop www.naturalhandyman.com/bookshop
- Find a handyman at www.naturalhandyman.com/network
- Win unique home repair gifts and prizes at www.naturalhandyman.com/contest
Please read the important copyright and disclaimer information is located at www.naturalhandyman.com/copyright
Also in Home
- 5 reasons to consider living in a tiny house
- Homemade cleanser recipes
- Free fireplace logs
- Updating vinyl blinds for less
- When you can't afford housing repairs
- Winterizing your apartment
- Preventing an annual visit from the rooter guy
- Fall care for your fruit trees
- 5 ways your house can make you go broke
- 5 simple and affordable luxuries for your home
- 7 green ways to save money on laundry
- 5 home renovations that can raise your insurance rate -- or lead to discounts
- APR and mortgage rate: What you need to know
- 6 cheap, effective home security solutions
- Find the best mortgage rates in your area
- 3 ways to use a mortgage calculator
- Mortgage calculator: Calculate your payment and more
- Home equity calculator: HELOC vs. line of credit
- Mortgage refinance break-even calculator
- How much money can I borrow for a mortgage?
- Who offers the most home insurance discounts?