I'm getting ready to go for the 1 and 2 family dwelling test for Electrical Inspectors given by Experior. I'm reasonably confident in my ability to pass the test given that the questions are straightforward... but in the study guides I've ran into a couple that may even be considered "wrong" because in my opinion, either not enough data is in the question to derive the answer from the 4 choices, or the answer should be "none of the above" when it's not available.
Case in point...
20. Which one of the following methods is NOT acceptable for bonding metal conduit to a service panelboard enclosure?
A. Threaded hub on top of enclosure
B. Bonding type locknut on inside of enclosure
C. Bonding bushing with bonding jumper
D. Standard locknuts and bushings with locknuts both inside and outside of enclosure
According to the answer sheet, the correct answer is "D"... but I feel that there is not enough information, or the answer is "none of the above", because there is no mention of whether or not eccentric or concentric knockouts are being used.
Refer to 250-94 '99 NEC
Am I just missing something here (again)?
![[Linked Image]](https://www.electrical-contractor.net/ubb/confused.gif)
[This message has been edited by sparky66wv (edited 07-05-2001).]
