grounding not required
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peter d
Senior Member
- Location
- New England
It took me less than a minute of searching to find the answer in Article 250. So yes, there is a way of telling if you're right or not by looking up the answer. 
- Location
- Illinois
- Occupation
- retired electrician
The question cannot be correctly answered as written. It does not provide enough information.
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
Trying-- I am curious what book or booklet you are reading. Seems to have many poor questions.
tryinghard
Senior Member
- Location
- California
Ground it anyway and you wont be in violation. Just don?t bond the neutral.
these are the books I was given to study for the electrical plan review test.They were ordered through work off the internet and cost maybe 5 bucks,( Tghis book was ordered FOR ME, Not BY ME, I will get the exact names from them on Monday (it's blue and white and has a guy with a hard hat on the front smiling all cheesey). I have allready attempted to take it and I failed it. The way the booklets are worded and the way the test is worded only adds to my confusion. The exact wording was "Grounding is NOT required for a generator frame when:
in a wet location
in a hazardous location as defined in 500-517
when enclosed in metal housing
less than 150 V to ground ( Is one a typo? maybe should say 50 like some one stated above? Hope so, then I'm not as confused as I thought!)
I have NEVER pulled wire so the pull box questions do not make any sense to me, If the question is about "The length of the pull box" and the factor is 8 times the largest wire being pulled, does it matter if the question is worded to state the wire comes out on an ajacent wall? It's the wording that throws me a curve, It took me two days to figure out all they wanted to know was the locked rotor amps when they throw a "Letter" in the question for motors. This along with service factors, efficiency ratings blah blah blah.
The NPCCI exams do not have plans, they instead have questions that are at least a paragraph long and you have to "weed" through their junk to get to the crux of the question.
in a wet location
in a hazardous location as defined in 500-517
when enclosed in metal housing
less than 150 V to ground ( Is one a typo? maybe should say 50 like some one stated above? Hope so, then I'm not as confused as I thought!)
I have NEVER pulled wire so the pull box questions do not make any sense to me, If the question is about "The length of the pull box" and the factor is 8 times the largest wire being pulled, does it matter if the question is worded to state the wire comes out on an ajacent wall? It's the wording that throws me a curve, It took me two days to figure out all they wanted to know was the locked rotor amps when they throw a "Letter" in the question for motors. This along with service factors, efficiency ratings blah blah blah.
The NPCCI exams do not have plans, they instead have questions that are at least a paragraph long and you have to "weed" through their junk to get to the crux of the question.
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Generators not required to be grounded when :
In an Isolated wet location
a hazardous location,
wires are enclosed in a metal casing
or when the generator terminals are greater than 150v to ground
Based on 250.21 I chose the 150v to ground answer
I left out the the "Isolated" part ( Iam assuming thats what ISO means in the question)
For the most part you guys are pretty patient. and I do appreciate it
In an Isolated wet location
a hazardous location,
wires are enclosed in a metal casing
or when the generator terminals are greater than 150v to ground
Based on 250.21 I chose the 150v to ground answer
I left out the the "Isolated" part ( Iam assuming thats what ISO means in the question)
For the most part you guys are pretty patient. and I do appreciate it
The way it was worded is this: which statment is true concerning the required grounding of a generator frame?
a generator frame is not required to be grounded in a isolated wet location?
a generator frame is not required to be grounded in a hazardous location?
a generator frame is not required to be grounded if the wires are in enclosed in a metal housing?
a generator frame is not required to be grounded if the generator terminals are 150v to ground or greater?
I guess the key word is REQUIRED, If it not required but Allowed to be grounded has no bearing on this.
I have read 250 over and over, and thats why I chose the 250.21 because frankly, I have no idea and this looks like it was wrong also because this doesn't mention generators in any of the requirements. What am I missing here in this question?
a generator frame is not required to be grounded in a isolated wet location?
a generator frame is not required to be grounded in a hazardous location?
a generator frame is not required to be grounded if the wires are in enclosed in a metal housing?
a generator frame is not required to be grounded if the generator terminals are 150v to ground or greater?
I guess the key word is REQUIRED, If it not required but Allowed to be grounded has no bearing on this.
I have read 250 over and over, and thats why I chose the 250.21 because frankly, I have no idea and this looks like it was wrong also because this doesn't mention generators in any of the requirements. What am I missing here in this question?
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