Examination yesterday showed: * All connectors have 4 pins, and one wire is green * Labels in most of the gear just says "see manual" but two pieces are clearly (and multiply) labeled "wired for 208V" * Schematics show everything wired phase-to-phase, no neutral * 110V "convenience outlets" are run from a step-down transformer between 2 phases So, it appears to be 208V delta. I can run this from a wye-output transformer, though, right? Its plate says 208V phase-to-phase.