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120/208 VAC Service (follow-up)

Discussion in 'Electrical Engineering' started by J.B. Wood, May 28, 2013.

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  1. J.B. Wood

    J.B. Wood Guest

    Hello, everyone, and my thanks to all who replied to my OP. Although I
    didn't peer inside the outlet box I suspect I encountered a 208 VAC
    single-phase service consisting of two hots and a ground. I further
    discovered that a number of the higher kVA UPSs on the market are
    designed to operate from 208 VAC single-phase and can often use 240 VAC
    single-phase as an alternative. (my only previous experience had been
    with hefty AC-DC power supplies that required 120/208 or 277/480 VAC
    3-phase on the input side) Sincerely,
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