I have a question(s) with respect to applying 430.32(A)(1) - from OP
1. Because the nameplate shows a SF of 40A....do you consider this motor 'marked with a service factor'?
2. Do you consider this motor 'marked with a service factor' of 1.15? [the arithmetic => 40/35 = 1.143...which is less than 1.15]
When applying 430.32(A)(1) to size 'heaters' this 'marking' and the value of 1.15 matters.
Just wondering which way you would go when sizing the heaters.
I ask from an academic perspective.
35 x 1.15 = 40.25A (that's why I said 40 and change), so if that motor says "SF Amps = 40" then yes, that means it is marked with a 1.15 Service Factor. But don't over interpret 430.32, which says overloads "shall be selected and rated
no larger than the following minimum percentages
based upon the full load current rating, in amps, listed on the motor?s nameplate:" ... So you
may size the overload protection for the Service Factor, but in my opinion you should not if you don't have to. Officially, NEMA MG-1 states that although a motor
may be run into the SF when necessary, it also says something to the effect of "but you can expect that it will not perform to specification in other areas such as torque, efficiency and service life" (I don't have a copy of MG-1 on this PC therefore I'm going by memory here, so don't quote me exactly).
In addition, if you read the motor starter heater selection charts or dial adjustment procedures from most NEMA manufacturers, they usually tell you that the 125% for a 1.15SF motor is ALREADY factored into the selection chart, so don't make that common mistake of doing it AGAIN. You only alter it down if you have a 1.0SF (or unmarked) motor. With IEC overloads, they are all set for 115% for a 1.0SF, because IEC motors have no Service Factor (or 1.0 for all intents).