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I am in school. Is there a good book that I could use to practice sizing grounding electrode conductors, equipment grounding conductors, Main bonding jumpers, and System bonding jumpers? The tables are 250.66 and 250.122. As well as 310.15(b)(16) in the NEC. I just need something to practice these calculations. Also titles of videos online and websites with free information would be cool also. Any suggestons?
 

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If you know what tables to look at, what is there to calculate?
for grounding electrode conductor it could be parallel conductors.

To OP--Look at Chapter 9 table 8. Also look at the notes to T250.66
 

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for grounding electrode conductor it could be parallel conductors.

To OP--Look at Chapter 9 table 8. Also look at the notes to T250.66
i have come across so many installs where they didnt use the special order cable for parallel and the ground was insufficient for the breaker size.
 
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