I just passed the October 2015 PE-Electrical Power Exam and I am selling the followings:
Spin-Up for PE Power Exam (5 Sample Exams) - $50
Tom Henry's NEC 2014 Keyword Index - $10
NCEES Power Sample Questions + Solutions - 25
All of these materials are in excellent condition. Email...
For both problems I get the same but "positive" magnitudes and different angles using the ABC sequence.
I think in the problem 3-18 when the button T is pushed the relay Z will de-energize making Z contact open this will disconnect the motor from phase A to neutral, therefore IA=0.