2 phase motor overprotection question

[outlawrx]

Good morning everyone. Im stumped on this question and would love to have some help to clearify it

Q: determin the Maximum current setting permitted for overload protection for a motor that has a thermal protector integral with the motor, given the following: 7.5 hp wound rotor type, two -phase 4-wire ac, 230 volts

A. 19 amps
B. 26.6 amps
C. 29.6 amps
D. 32.3 amps

i have the answer, its C. 29.6 amps but can't figure out how to get that answer:-?
all i can find is art: 430.149 table in nec 2002?? anyone. i though it would be x1.15 or even 1.25 but nothing. thanks

 

[dnem]

You're throwing me off by quoting 2002 stuff, so I'll just talk 2008 lingo and you can get an interpreter to read it back to you.

2phase 4wire 230v 7.5hp takes you to T430.249
Under 7.5hp across + 230v down, you get 19a

Thermal protector integral with the motor takes you to 430.32(A)(2) and under the category of "Motor full-load current from 9.1 to, and including, 20 amperes" you get a 156%

19 x 1.56 = 29.64

 

[dnem]

OK, I've received the official translation over the "teletype". . It came thru morse code from one of the stone age states that are still on the '02.

'08 T430.249 = '02 T430.149
430.32(A)(2) remains the same