I'm in tech school and would appreciate if someone checked my work. Thank you
We have a 480/277 panel with a 3-pole 45amp breaker feeding a vfd. The vfd main breaker is 50amps 460 volts. I figured #10 cu thhn with a #10 cu for the ground. My question is how can #10 wire be on a 45amp breaker We? Isn't #10 undersized for that big of a breaker? Appreciate it.
We have a 480/277 panel with a 3-pole 45amp breaker feeding a vfd. The vfd main breaker is 50amps 460 volts. I figured #10 cu thhn with a #10 cu for the ground. My question is how can #10 wire be on a 45amp breaker We? Isn't #10 undersized for that big of a breaker? Appreciate it.