Three phase 208Y with 120V

Discussion in 'Electrical Forum discussion & Blog' started by LLigetfa, Nov 7, 2012.

  1. LLigetfa

    LLigetfa DIYer, not in the trades

    Feb 6, 2011
    NW Ontario, Canada
    Now, I'm no EE and not even an electrician but it is my understanding that on a three phase with 208V between phases, one still gets 120V to a fourth neutral. Is there any "normal" system that would give you much less, like 104V?

    My furnace guy was making excuses for being a day late. He said he wasted the day before on a three phase system where the voltage was low. He said he didn't realize that a three phase 208Y would put out just 104V when split. I've never heard of such a thing. I dunno... sounds like something was jury rigged.
  2. hj

    hj Moderator & Master Plumber Staff Member

    Aug 31, 2004
    Cave Creek, Arizona
    240 single phase will give two 120v lines. 208 three phase is out of synch with the neutral so it gives 208 between aany two "hot" lines but 120 v to neutral. He was misdiagnosing something.
  3. Sponsor

    Sponsor Paid Advertisement

  4. ActionDave

    ActionDave Electrician

    Feb 4, 2009
    That's just not true.
Similar Threads: Three phase
Forum Title Date
Electrical Forum discussion & Blog Three-way dimmer Jun 15, 2017
Electrical Forum discussion & Blog Wiring Three-Way Switch Jul 4, 2016
Electrical Forum discussion & Blog Three Way Switches Light Dimmer Installation May 1, 2016
Electrical Forum discussion & Blog Three way switch with integral pilot... exists? Dec 8, 2015
Electrical Forum discussion & Blog Can three #8 and one #10 wires be in ½†metal conduit? Aug 1, 2013

Share This Page