No, it's for voltage drop. NEMA standards (nameplate ratings) assume voltage drop and are often different than nominal line voltage.
230Y/400V 50Hz is the European standard and why you see a lot of 208-240V 50/60Hz stuff, but 460V is nobody's standard. 460V = 480V - about 5% voltage drop. I haven't really seen much 201V stuff, but it strikes me as a similar NEMA rating which is OK within a wide swing of voltages.
Last edited by SteveFehr; 04/17/17 05:51 AM.
