shockme,
Quote
440.12(A)(1)--115% of the nameplate rated load or branch circuit selection current, whichever is greater.
That tells me that 28 X 1.15 = 32.2 amps.
The 28 amps is the branch circit selection current and you are not required to take it at 115%. You use it at its face value.
Don

Don(resqcapt19)