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Thanks 

Omer, I also raised the same issue. Is available in some thread in this forum.  The correct answer must be Root of mean of the squares of the waveform IMHO. 

I however, though I do not have a reasoning for it, or say another way to look at it is take same pu of 5% for Generator too. The aim to throw this question to forum was to have second opinion, least I miss something. Anyways I thank you, Omer for the engagement. You feel good when you come to...

Omer, Thanks for response and you are right. I am sorry, I wanted to post the question, but posted the answer. Now I post the Question. 

Is there any relation between pu and X/R ratio. From the info given in problem, can someone find pu Z of Gen. Any material on this part of the subject? Thanks

Now, what are the figures 1:4 and 2:1 in the attached figure, here? Are they Turns Ratios (Phase Voltage Ratio) or Voltage Transformation Ratio of Xmers. The PPI guys are taking it as turns Ratio? In the particular question I got it right even by Voltage transformation Ratio because it was from...

What is the probability of a question on Ampacity of conductors mixed with temperatures of terminations  Article 110.14. Just wanted to avoid to learn the ifs and buts written there. If it really matters, can someone give a simple language version of Art 110 applicability.

The first statement of both questions seems to be similar and so may confuse some but the other statements like asking neutral current in Q8 and not asking in Q40  and few other info, makes them different. If you read them carefully  you may find the difference that both loads are connected...

Have they missed to take 1.25 factor, is it, I have to verify?

Lol. Old is Gold! Is there any change in 2014 NEC- no from your submission, then?

It is my pleasure! 

The equations given  at figure 17 are exactly what I was mentioning  about 4 KVAs in my previous reply. 

The equations given here (fig17) are good. The problem is in the question  of CI itself. The Voltage Ratios are not matching with the given turns ratio. Please do not use the Secondary Voltage given by CI Question, make your own secondary Voltage by turns ratios given. The Q can be done without...

You are absolutely right. But just keep an eye on the transformer ratio, sometimes they give; for example, in your question Transformer ratio 34.5/12 and Genr at 12.5kV. In that case as you have assumed 34.5kV as base the base voltage at Genr will be 12kV and not 12.5 kV. Here you have to use...

It is,  because across the transformer the MVAs do not change but the Voltages and currents change. The other way is to transfer the actual Z of Genr on 34.5KV side of the transformer, convert it into pu again and do it, you will get the same answer. If it does not make much sense then, it will...

As I mentioned earlier, the  Voltage  Ratio and turns ratios do not match in this question. Please do not solve this Q by Voltages. Solve it by Turns Ratio. Assume any Voltage for primary and the answer will be same. 

Let me put is like this. Imagine an Auto Xmer made from a single phase Xmer having two wingdings. Now we know from our 1phase Xmer knowledge that both these windings always have same KVA ( V1I1=V2I2). While using the same windings as series/common winding in auto Xmer mode we do not change...

Something wrong. I got B. 300 kcmil and book also says same. Can you recheck it or share your answer book.