240v phase-phase vs phase-neutral?

Discussion in 'Lighting and Electrics' started by danTt, Sep 21, 2019.

  1. danTt

    danTt Well-Known Member

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    So a bit of a weird one that I feel like I know the answer to but find specific justification with current googleage.

    Ignoring frequency for this discussion, is there any different between "European" 240v power where the voltage is 240v line-neutral and "US" 240V power where that voltage exists phase-phase? Can you use connectors normally designed for a line+neutral (ie powercon) for phase-phase operation and feel safe on an NEC/LEGAL grounds? My gut (and experience with every rental house everywhere) says yes, but I can't find anything saying this is actually true. In both cases you have two current carrying conductors, but neutral is always treated a bit special even when a current carrying conductor..
     
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  2. RonHebbard

    RonHebbard Well-Known Member Premium Member

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  3. JD

    JD Well-Known Member

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    There is actually a general issue with PowerCon connectors, and a gray area as they end up being used at 208 phase-to-phase. Same could be said about Socapex connectors. Still the practice is widespread. If a connector is rated for 240v, and the ground is kept at ground then both the H & N contacts are considered current carrying conductors. Kind of reminds me of using 12/3 for 208 volts. Still going to be B/W/G but white is no longer neutral. Not sure if it is still required, but I always slipped a piece of red heat-shrink over the W in the connector.
     
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  4. STEVETERRY

    STEVETERRY Well-Known Member

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