How to find articles in the Code

[vhterway]

Re: How to find articles in the Code

Well, I want to thank everyone on this forum for all or your help. I took my ICC test today and passed!!
I have a couple of questions, though. There are two questions in particular on the test that bug me. One of them was:
What is the minimum conductor ampacity for a three phase 15Hp 230V induction motor?
a. 57.8
b. 46.2
c. 42
d. 60.5
According to Table 430.150, the flc for this motor is 42 amps. Using the 125% rule, I get 52.5 for conductor ampacity. Did I miss something?

The other question is:
When sizing conductors the code specifies two derating factors; one for number of conductors in the raceway and one for temperature. How are the derating factors applied?
a. only the highest derating factor applies
b. the product of the two factors
c. the difference of the two factors
d. only the ambient temperature factor
I answered b since the factors are multiplied to the current rating, but the way this is worded it sounds like they mean to multiply one factor to the other. Is my answer right or did I miss something here too?
Thanks again to everyone that helped me out!

 

[bphgravity]

Re: How to find articles in the Code

I agree with your answer to number one.

The answer to the second question is B.

 

[George Stolz]

Re: How to find articles in the Code

430.22(A) sets the 125% rule. Who said this motor falls under that rule?

[ May 21, 2005, 10:32 AM: Message edited by: georgestolz ]

 

[vhterway]

Re: How to find articles in the Code

Thanks again for all of your help guys!