My worry was based on the thought that the ratio of 208 to 240 was the same as the ratio between 416 and 480. 416 volts sounds too low.
The 208 volt systems here actually measure 215-216 volts, which would give me 430 volts on the high side. The nameplate actually calls for 460-480 volts. So 30 volts low sounds better.
The "backwards" thing didn't concern me, as I thought it would work fine in either direction. Was I wrong on that?