Almost all of the motors we hook up out where I work are 9 or 12 lead, 230/460V 3phase... Although unless it's way off in some corner of the lease, the 480V network tends to run about 492V phase to phase, ungrounded delta.We've never had a problem with motors biting the dust that I've seen. (Largest motor I've connected was 250 HP. @ 1400 rpm. The 800A MCC rattled louder than that motor on startup [Linked Image] )
Controls and buildings feed from "PanelTrans" that output 120/240V single phase.. We usually put these a tap lower on the primary connection and get a nice 121/243V output. [Linked Image]