Take Home Test

[stholley]

I am a current student working towards my associates degree in Industrial Maintenance. I have a take home final in my basic electricity class. This question was asked on one of the earlier tests, I thought I had gotten it wrong, but according to my notes I did not. Can someone please verify my answer. I must state the article/table where I got the answer.


What is the minimum size grounding conductor permitted for grounding raceways of equipment of 80 amp circuit?

Answer: 8 awg NEC Table 250.66

 

[LEO2854]

I am a current student working towards my associates degree in Industrial Maintenance. I have a take home final in my basic electricity class. This question was asked on one of the earlier tests, I thought I had gotten it wrong, but according to my notes I did not. Can someone please verify my answer. I must state the article/table where I got the answer.


What is the minimum size grounding conductor permitted for grounding raceways of equipment of 80 amp circuit?

Answer: 8 awg NEC Table 250.66

# 8 Is corect but you have the wrong table look at ,Table 250.122 Minimum Size Equipment Grounding
Conductors for Grounding Raceway and Equipment

The other table is for ,Table 250.66 Grounding Electrode Conductor for
Alternating-Current Systems

 

[stholley]

Thank You

 

[infinity]

Thank You

I'm curious how you got #8 from table 250.66.

 

[resistance]

I'm curious how you got #8 from table 250.66.

My assumption is that the OP looked and selected from the #2 copper or smaller row.
:blink:

 

[stholley]

resistance is correct I used the 2 or smaller column

Sean

I'm curious how you got #8 from table 250.66.

 

[stholley]

I could use help on this one too...if you would be so kind as to point me in the right direction.

.
What colors are used for identifying the grounding conductors?


I remember reading an article that said something like "bare with greenish tint or green insulation" but I just can't seem to find it now

Article 200 covers grounded conductors not grounding conductors
Article 250.119 covers equipment grounding conductors

I know it's right in front of me, but I just do not see it !!!


Sean

 

[ActionDave]

I think you are misremembering.

Bare-yes.
Bare with a greenish tint- never heard of it.

 

[stholley]

do you happen to know the article?

Sean

I think you are misremembering.

Bare-yes.
Bare with a greenish tint- never heard of it.

 

[Stevareno]

I could use help on this one too...if you would be so kind as to point me in the right direction.

.
What colors are used for identifying the grounding conductors?


I remember reading an article that said something like "bare with greenish tint or green insulation" but I just can't seem to find it now

Article 200 covers grounded conductors not grounding conductors
Article 250.119 covers equipment grounding conductors

I know it's right in front of me, but I just do not see it !!!


Sean

It's there in 250.119. Grounding conductors can be bare, or if insulated or covered, have to be green or green with one or more yellow stripes.

 

[chris kennedy]

250.119 Identification of Equipment Grounding Conductors.

Unless required elsewhere in this Code, equipment grounding conductors shall be permitted to be bare, covered, or insulated. Individually covered or insulated equipment grounding conductors shall have a continuous outer finish that is either green or green with one or more yellow stripes except as permitted in this section. Conductors with insulation or individual covering that is green, green with one or more yellow stripes, or otherwise identified as permitted by this section shall not be used for ungrounded or grounded circuit conductors.

 

[stholley]

Section 250.119 is for "Identification of Equipment Grounding Conductors", the question does not say "equipment" Is there another section that lists just grounding conductors or am I reading too much into the question?

Sean

It's there in 250.119. Grounding conductors can be bare, or if insulated or covered, have to be green or green with one or more yellow stripes.

 

[stholley]

Thank You for everyone's help, I see what I am doing. When I read "equipment" I was thinking a industrial machine. But after reading the definition of equipment in Article 100, I can see that the answer was right there in front of me. I was just reading too much into the question.


Sean

 

[dana1028]

I'm curious how you got #8 from table 250.66.

I don't use anything larger than a #2 for my 80A circuits [short runs of course]...so I'm good with a #8:angel: