Can I use 430.63 to size my OCPD smaller than what is designated by 215.3? 125% of the largest motor plus all of the loads is smaller than 125% of all the loads.
It seems by the explanations here is that I can get my minimum feeder conductor size, which is 125% of largest motor, 100% of other motors, and 125% of everything else and then use an OCPD for that conductor in accordance with 430.63. If the OCPD rating is less than the ampacity of the above conductor then I can use it. But this is where I get confused...
215.3 is giving the MINIMUM i can use...does whatever I calculate in 430.63 have to be above this, or I am forced to default to the 215.3 value?
The advantage of 430.63, with my current understanding, is that you can size the OCPD larger than the ampacity of the feeder conductor within the confines of 430.63.