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    Fourtitude.com


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    1. Member
      Join Date
      Dec 26th, 2006
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      3,938
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      2015 Fiesta ST, 97 Miata
      07-10-2019 09:12 PM #1
      My new house has a lot of 3 way switches, lights and receptacles. On one 3-way receptacle (controlled by 2 switches), when it was off, this nightlight would glow dimly. When I measured, I got 25v when off and 120v when on.

      I checked another 3 way light switch on a different breaker, and on one traveler I got 120v, and the other I got 22v. When I flip the switch, they switch values.

      I checked another 3 way light switch on a different breaker, and on one traveler I got 120v, and the other I got 0v. When I flip the switch, they switch values.

      Is this an issue with one leg of my 240v service? I can try to check more and track to see if the breakers are all on one side. What should I check to further diagnose what is happening, and how can I fix it?

      Also, with the power off to the receptacle, I was checking resistances and the neutral was 0.5ohm to ground. I don't know if that's relevant or not...

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    3. Member
      Join Date
      Dec 26th, 2006
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      3,938
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      2015 Fiesta ST, 97 Miata
      07-11-2019 09:05 PM #2
      I've determined it's an induced or phantom voltage. Any load on it and it drops to zero. I would have never noticed except with the super low-power LED nightlite, it would dimly glow at 1.5v.

      Apparently this happens with floating traveler lines run along the other traveler with 120v.

    4. Member checkoutmyjunk's Avatar
      Join Date
      Oct 30th, 2001
      Location
      Central, PA
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      2,602
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      C5 Z06
      07-12-2019 02:40 PM #3
      Are you saying the was a result of inductive reactance?

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