Recent content by AAGR2013

sold

no drill book. I didn't receive you PM. However I PM you a second ago.

I passed Oct 2016 exam on 1st try after many years out of school. I don’t use a lot of reference, however I tried my best to compare and categorize each problem, I went over each book 3-4 times. During the exam I can quickly figure it out the right approach. I hope my experience will help you...

I just received pass confirmation on 1st try after many years out of school. Your reference is good enough, no need more. You may need create a cheating sheet, not only formulas, but also hint for solving different type problem, for instance, "transmission and distribution" subject you get the...

  Mr. Alex Graffeo

ask Alex the difference 49 and 50, here is the reply: Yes, It is because it is a 3 Phase fault.  In the most recent printing I added a note:   With that assumption, there would not be a negative sequence component for the 3-ph fault and we get:     Also, in case it's not in your...

ask Alex and get clarification 

how does the load current IAB= source current Iab, and the current pass ZLN is equal to  √3 Iab ?

thank you so much, knight! you helped me a few questions  :thankyou:

hope helps

got it

see below figure. 5-hp FLA is 7.6, 15-hp is 21, 40-hp motor is 52 based on 2008 NEC 430.62(A), then 7.6+21+52*1.25=93.6 based on 2008 NEC 430.152, the branch circuit protective device for the 40 hp motor is 250%*52=130..... I don't have 2008 NEC, what's 430.152? I can't find similar thing in...

no

I need new glasses :reading:

If I have rated 90 degree #12 THHN runs in ambient 55 degree, the capacity is 30A based on 310.15(B)(16). Because it is used in 55 degree, the factor need to multiply. If use (a), the factor is 0.76, however if use (b), the factor is 0.84, which one shall I use?