I'm a mech engineer so this stuff is really confusing me.
How is 115V the same as 120V. I know about the 10% rule, but why is the nominal voltage not always used in discussions, if 120V is nominal why are some people calling it 115V?
Can someone list the types of voltages that are possible in a one phase and 3 phase-5-wire, 4 wire configuration?
Thanks for any assistance. I apologize in advance if my question is unclear... its due to my confusion.