Home>Discussions>ELECTRICAL & LIGHTING>Convert a 3-way switch to a single switch
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NEC
Re: Convert a 3-way switch to a single switch

Here is the wiring diagram in Jacks link. They have identified the Common and Traveler A as the same termination point on the switch. I think what they mark as "Jumper" is also confusing.

One of the user comments in the link said they could not make it work. With that diagram I can see why.

Re: Convert a 3-way switch to a single switch

There is a nuetral in the box, look at the colors on the 3way, it isnt backfed so there is (likely) a nuetral in the box. So ONCE AGAIN use the right sensor, the 3way sensor. I'm calling bullsh#t on this entire thread. Diy or Not you dont rewire a branch circuit to accomadate material you have, you get the right material for the job in this case .. a 3way sensor. Get the right sensor. AS far as never seeing a 3way sensor in 17 years in the trade..

heres one

another here

NEC
Re: Convert a 3-way switch to a single switch

Well,:D

I’d like some continuation on the subject. Because, I do not have an answer. Though I work as an electrical contractor and have been in the industry for a couple of years I never cease to learn something new every day.

Couple thoughts:

So take a good look at the wiring diagram I posted from the link that Jack posted. If wired the way the diagram shows there is only one true traveler. Traveler A is made up to be hot all of the time.

So lets say that you have a “blind” three-way. Say an L shaped stairway where one three-way is not in view of the other. If you wire it per the diagram you will still need to turn the lights on manually from the “switch” end of the three-way system.

It seems to me that you would be better off wiring two single pole motion sensors and paralleling the hot and one switch leg from the load side of each sensor to make the system fully automatic for both on and off. (Though, I do not know if the sensors will operate correctly if the load side of one switch is seeing a hot from the other.)

If the three-way is not a blind three-way such as a laundry room entry from a garage then I do not see much point in wiring it like the diagram and I would rewire it with one sensor and blank off the other.

jcelectric
Re: Convert a 3-way switch to a single switch
NEC wrote:

Well,:D

I’d like some continuation on the subject. Because, I do not have an answer. Though I work as an electrical contractor and have been in the industry for a couple of years I never cease to learn something new every day.

Couple thoughts:

So take a good look at the wiring diagram I posted from the link that Jack posted. If wired the way the diagram shows there is only one true traveler. Traveler A is made up to be hot all of the time.

So lets say that you have a “blind” three-way. Say an L shaped stairway where one three-way is not in view of the other. If you wire it per the diagram you will still need to turn the lights on manually from the “switch” end of the three-way system.

It seems to me that you would be better off wiring two single pole motion sensors and paralleling the hot and one switch leg from the load side of each sensor to make the system fully automatic for both on and off. (Though, I do not know if the sensors will operate correctly if the load side of one switch is seeing a hot from the other.)

If the three-way is not a blind three-way such as a laundry room entry from a garage then I do not see much point in wiring it like the diagram and I would rewire it with one sensor and blank off the other.

Exactly, you got it.....do it

JLMCDANIEL
Re: Convert a 3-way switch to a single switch

Here's wiring diagrams for the Heath/Zenith SL-6108-IV advertised for 3-way wiring

It would appear that the 3-way switch is wired so one position is in parallel with the manual "on" built into the sensor and the other position is for motion sensing.

My question is how does the sensor get power with hot only connected to it, no neutral?
Jack

Re: Convert a 3-way switch to a single switch
NEC wrote:

Well,:D

I’d like some continuation on the subject. Because, I do not have an answer. Though I work as an electrical contractor and have been in the industry for a couple of years I never cease to learn something new every day.

Couple thoughts:

So take a good look at the wiring diagram I posted from the link that Jack posted. If wired the way the diagram shows there is only one true traveler. Traveler A is made up to be hot all of the time.

So lets say that you have a “blind” three-way. Say an L shaped stairway where one three-way is not in view of the other. If you wire it per the diagram you will still need to turn the lights on manually from the “switch” end of the three-way system.

It seems to me that you would be better off wiring two single pole motion sensors and paralleling the hot and one switch leg from the load side of each sensor to make the system fully automatic for both on and off. (Though, I do not know if the sensors will operate correctly if the load side of one switch is seeing a hot from the other.)

If the three-way is not a blind three-way such as a laundry room entry from a garage then I do not see much point in wiring it like the diagram and I would rewire it with one sensor and blank off the other.

Once again I am being narrowminded and totalitarian. There are, indeed as you point out at least a few good reasons to NOT use a 3 way sensor.
this time I stand corrected

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