Can a timer be used on a three way switch circuit
#1
Can a timer be used on a three way switch circuit
Had a customer ask if a three way switch, two toggle switches operating one light, can be substituted with a timer at one of the switches. I told him I don't think so, but was not sure. He confirmed he had three conductor wire (red, black and white). He said the timer would be powered by the hot wire. But I told him where would you connect the traveler (red) wire to provide power if the switch is flipped. I think it would work only if the switch was in one position only. Your thoughts?
Edit...Are there timers made for a three way switch set up?
Edit...Are there timers made for a three way switch set up?
#2
They are available ,but note that a neutral is required.
https://www.amazon.com/Honeywell-PLS...y+timer+switch
https://www.amazon.com/Honeywell-PLS...y+timer+switch
#3
Member
Check out the Intermatic STO1.
They make a 3-way version, no neutral required. It's battery powered.
Intermatic 15-Amp In-Wall Heavy Duty Astronomic Digital Timer-EI600WC - The Home Depot
They make a 3-way version, no neutral required. It's battery powered.
Intermatic 15-Amp In-Wall Heavy Duty Astronomic Digital Timer-EI600WC - The Home Depot
#8
GE makes a timer I use all the time. The link is below. Here's the poop.
You need a neutral which isn't really a problem because the timer becomes the switching device and the remaining three way switch is only used as a single pole switch. The switch tells the timer to turn on or off.
They give you instructions which are not easy to follow. I have helped a number of members here wire them but it requires pictures of the wiring at both ends. It is NOT a cake installation if you don't understand wiring.
GE 3-Way Sunsmart In-Wall Digital Timer-15312 - The Home Depot
You need a neutral which isn't really a problem because the timer becomes the switching device and the remaining three way switch is only used as a single pole switch. The switch tells the timer to turn on or off.
They give you instructions which are not easy to follow. I have helped a number of members here wire them but it requires pictures of the wiring at both ends. It is NOT a cake installation if you don't understand wiring.
GE 3-Way Sunsmart In-Wall Digital Timer-15312 - The Home Depot
#9
OK. That confirms my suspicions and I learned about some new product. Thanks to both Geochurci and PJ for the heads up and concise answer.
PJ, that Intermatic unit looks interesting that aandpdan (post #3) listed. No neutral required, multi voltage, AC or DC and multi type lights, single pole or 3 way. But it does use a battery.
PJ, that Intermatic unit looks interesting that aandpdan (post #3) listed. No neutral required, multi voltage, AC or DC and multi type lights, single pole or 3 way. But it does use a battery.
#10
Yes.... I have used them too. At one time they were very reliable. I've found the quality has slipped and no longer use them.