The exam question (I took the Master test back in Feb, so I'm going off of my notes here...) said:
For a store that is 4000 square feet with a connected load of 9kVA, calculate the number of 120V/20A circuits needed.
What I explained in my last post is what I did for my answer.
Shouldn't you take 4000 X 3 then divided by 2400 to get 5 circuits.
9kva would not be used because the connected load is less than the calculated 3va per square foot.
Where does the 1500 VA sign come into play? Only in a bank or office?
If you add the sign load per 220.14, then it would be 6 circuit.
I don't agree with your answer if this is a store you must calculate for continuous load. So, you would be dividing by 1920 not 2400. This answer could change also by the size of the loads being connected. Suppose that each light, as we had in another thread, was 500 watts, then the connected load for each circuit could only be 1500 watts.
120v x 180va = 2400, Why would you divided by 1920?
This is a bad question, and Mike Holt will not claim that his sample tests are perfect. Indeed, he would like to hear the news, if anyone finds an error in one of his books.This is not a bad question. There are questions like this in Holt's books.
I agree!! I can post a ton of them from a few books written by well known teachers of the code. If one takes the time to pick up one (an exam prep book), you will see that most--at least the ones I have--exam preparation books are well written--explaining how to get to an answer (using all the details), then how to answer an exam question--deciphering the question without all the details.boku said:These are exam practice questions, so they do not always give every little detail.