Re: Motors
Remember when sizing motor circuits, the NEC requires you to use the ampere values in the table from 430, not the actual nameplate values.
Likewise, when choosing the final running current protective device, you should use the actual nameplate values and not the ones from tables. For instance, the Square D Motor Data slide rule lists the ampacity from the NEC (i.e. 10HP, 480V = 14A), however the "thermal unit" selection comes from some statistically safe formula (the suggested B25 is based on 12.8A)