Test questions

Test questions

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e57

e57

Senior Member
Location
San Francisco, CA
Had a employee luncheon today - which included a test - for prizes!

Dare I say it - being so used to debate about codes here I may have shot myself in the foot and came in second - as I am sure some of the provided answers to the questions were wrong, and questions poorly written, see example... (Taken from somewhere on the net...) No mention of particular situation, or terminology reguarding "subject to damage"....

So what is your answer?

Oh this is about GEC's I wrote the question wrong...
 
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That is one of those " how long is a piece of string?" type of questions. Give us more info if you want an accurate answer.
 
My point was it was a poorly written question - which I too just poorly translated but could not go back and edit....

What is the minimum size grounding electrode conductor that would not need to be run in conduit?

My answer is #4 as it would only need to be protected if exposed to severe physical damage....

#6 would be OK (and according to this test was right...) only if free from physical damage....

The answer is subject to interpretation of the question....


250.64(B) Securing and Protection from Physical Damage. A grounding electrode conductor or its enclosure shall be securely fastened to the surface on which it is carried. A 4 AWG copper or aluminum or larger conductor shall be protected if exposed to severe physical damage. A 6 AWG grounding conductor that is free from exposure to physical damage shall be permitted to be run along the surface of the building construction without metal covering or protection where it is securely fastened to the construction; otherwise, it shall be in rigid metal conduit, intermediate metal conduit, rigid nonmetallic conduit, electrical metallic tubing, or cable armor. Grounding conductors smaller than 6 AWG shall be in rigid metal conduit, intermediate metal conduit, rigid nonmetallic conduit, electrical metallic tubing, or cable armor.
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FYI - I won $25 for second - as opposed to $50..... :(
 
What if it is in a wall or under the floor in a crawl space? Not subject to damage and not in conduit either. See them like that all the time.
 
acrwc10 said:
What if it is in a wall or under the floor in a crawl space? Not subject to damage and not in conduit either. See them like that all the time.
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My point is that there is no "IF" or other qualifier in the question - so depending on your analitical mind-set you get the question wrong....

#6 is the minimum size - but only IF free from "physical damge" interpeted by the AHJ... But the way the question is written there is no "IF" So a higher qualifier like "Severe Physical Damage" is mute....
 
Then I'll just stick with my stock answer, "All of the above" :grin:

And getting $25 is better then nothing, how were the burgers?
 
e57 said:
There were like 20 questions and 3 teams.... of 3-4 - Open Book
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Ahh... Gotcha!

Bulb_lights_up_2.gif
 
i too voted #6, however , what about the #10 the catv or sat people use on the outside. This is not a service ground, but it is a conductor. I have also witnessed #12 thwn strung under an old home as a EGC to new 3 wire recepts.
 
Heres another....

What is the maximum allowed ampacity for #10 THW in an ambient tempature of 28C?
  • 15A
  • 25A
  • 30A
  • 40A
Some people might get this.... and could find what code the statement below came from....
The provisions of Articles 250, 300, and 310 shall not apply to conductors.....
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e57 said:
So - whats the answer???
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Given the 4 choices, I'd have to say 30A (T310.16, THW AWG10 CU is 35, no correction needed at 28?C. Since 40 is too much, I'm left with 30). I'm not following what 430.21 has to do with the question, though.
 
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