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120 phase in 120/240 50amp-gctid821705

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    120 phase in 120/240 50amp-gctid821705

    I understand there are 4 wires: Neutral, ground, 120, and 120.

    are the two 120 wires 180degrees out of phase, similar to

    the two 120 legs of a home electrical panel?
    Novurania 335DL. 30HP. WKRP in cincinnati. Previously: Bayliner 3818 in PNW.

    #2
    single phase service... yes similar to

    the two 120 legs of a home electrical panel?
    Joon, Kathy, Jaden & Tristan
    Uniflite 42 AC, DD 671N
    93 3058 sold
    92 2855 (day boat)
    91 Fourwinns 205 (lake boat)
    Longbranch WA
    Life is Good

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      #3
      if you put the VOM black lead onto one of the hot 50a wires,

      and the VOM red lead onto the other hot 50a wire: does the voltage read 240

      or does it read as zero?
      Novurania 335DL. 30HP. WKRP in cincinnati. Previously: Bayliner 3818 in PNW.

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        #4
        Yes, it is single phase 120/240 service just like your house. The two hots are 180 degrees out of phase. To test that dock is correctly wired volt meter should read 240 hot to hot and 120 either hot to neutral.
        John Rupp
        1989 2455 Ciera Sunbridge
        5.8 OMC Cobra

        1989 3288
        Starshine
        Hino 135

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          #5
          "aspen1880" post=821705 wrote:
          I understand there are 4 wires: Neutral, ground, 120, and 120.
          [color]blue wrote:
          Think in terms of two legs, each @ 120 vac (often referred to as L1 and L2 or Line 1 and Line 2)

          Then you'll have one Neutral ...... and one Earth Ground. [/color]
          Rick E. Gresham, Oregon
          2850 Bounty Sedan Flybridge model
          Twin 280 HP 5.7's w/ Closed Cooling
          Volvo Penta DuoProp Drives
          Kohler 4 CZ Gen Set

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