Motor Circuit Conductor and voltage drop Calculator uploaded

The new calculator for motor circuits finds the size of conductor and size of short circuit and ground fault protective devices. It does this for AC motors under 600 volts single phase and three phases as given in Tables 430.148 and 430.150. The duty cycle Table 430.22(e) is also included. Derating for ambient temperature and more than three current carrying conductors is also included. I have checked out many combinations of problems and there seems to be no bugs. I did notice that for small wire sizes of No. 14 copper, No. 12 and No. 10 copper and aluminum the limitations placed by the note at the bottom of Table 310.16 (Section 240.4(D) do not apply. This allows a higher ampacity to be used for these wire sizes. I plan to expand the results to include size of disconnect, overload devices, and controller.

The next project is to design a calculator to do a reverse Table 310.16 lookup. This program will find the ampacity after the user selects conductor size, insulation temperature, and other conditions.