Test question question

[electrofelon]

"the ampacity for ungrounded conductors for specific installations shall. ___________"



The quick brown fox jumped over the lazy 100 characters minimum

 

[LarryFine]

Not be less than the calculated load?

 

[electrofelon]

Not be less than the calculated load?

Thats all i could think of. I couldn't find that wording in the code. The test proctor emphasized specific wording.

 

[don_resqcapt19]

Using the search function on Link, the only place "specific installations" appears in the 2023 NEC is 230.42(B).

(B) Specific Installations.
In addition to the requirements of 230.42(A), the minimum ampacity for ungrounded conductors for specific installations shall not be less than the rating of the service disconnecting means specified in 230.79(A) through (D).

 

[electrofelon]

Using the search function on Link, the only place "specific installations" appears in the 2023 NEC is 230.42(B).

Hmmm maybe that is it. Test is based on 2008 believe it or not, let me look and see if that wording is in there. Kinda a bad test question as there was no mention on what type of conductors they are.

 

[electrofelon]

That wording is also in the 2008, and going from memory exactly matches the text on the test question. What a BS question, just giving a wording snippet like that.

 

[electrofelon]

K well i got a 91% in the test. It was 45 questions so i missed 4. Not sure what the other questions i missed were, but i remember a couple strange ones. One was "what is the size of the grounding electrode conductor to an underground water pipe for a 100, 200, and 400 amp service. I wrote in, " well it depends on conductor size used, but assuming common sizing......"

 

[Dennis Alwon]

bad question. Esp. for a 400 amp service. If the service consists of 2- 200 amp panels the grounding electrode conductor size is different then if it were a 400 amp panel.

 

[Deltaforce]

bad question. Esp. for a 400 amp service. If the service consists of 2- 200 amp panels the grounding electrode conductor size is different then if it were a 400 amp panel.

But GEC size determined by service conductor size, not by two 200A panel or one 400A panel?

 

[Dennis Alwon]

But GEC size determined by service conductor size, not by two 200A panel or one 400A panel?

Yes but if you have 2 panels that are 400 amps the standard size conductors will require a smaller grounding electrode conductor than the straight 400 amps.
Obviously, if you decide to rum 500 kcm for both 200 amp panels, then that changes things.

 

[Deltaforce]

Yes but if you have 2 panels that are 400 amps the standard size conductors will require a smaller grounding electrode conductor than the straight 400 amps.
Obviously, if you decide to rum 500 kcm for both 200 amp panels, then that changes things.

If a service disconnect upstream panels, it does not matter
If no disconnect, only one panel service panel
Correct?

 

[TwoBlocked]

I guess the reason you don't have to get 100% to pass is because a certain percentage of the questions will be BS.

 

[Hv&Lv]

K well i got a 91% in the test. It was 45 questions so i missed 4. Not sure what the other questions i missed were, but i remember a couple strange ones. One was "what is the size of the grounding electrode conductor to an underground water pipe for a 100, 200, and 400 amp service. I wrote in, " well it depends on conductor size used, but assuming common sizing......"

91. admirable. As long as you pass. Now if you had failed by one or two then the concern over the questions would be enough to call for a review or challenge.

What do they call a Dr that makes a 201 on the USMLE?

A Doctor.

 

[Dennis Alwon]

If a service disconnect upstream panels, it does not matter
If no disconnect, only one panel service panel
Correct?

I don't understand. It matters as there is always a disconnect at the service.

It is not uncommon to see a 400 amp residential panel with 2- 200 amp disconnects. In this case we add the circular mils of the conductors. For instance if the conductor is 4/0 aluminum then you would find the cir. mil of 4/0 and multiply by 2. We used that number in T 250.66 to find the grounding electrode conductor size.

When, in your opinion is there no disconnect for a service?

 

[electrofelon]

I remembered another one: "true or false, wiremold requires a wire type EGC"

 

[Deltaforce]

When, in your opinion is there no disconnect for a service?

I stated if no upstream disconnect as service disconnect, the panel with disconnects service entrrance panel and no change in GEC size if no change in service conductors size

 

[Deltaforce]

I remembered another one: "true or false, wiremold requires a wire type EGC"

False

 

[LarryFine]

I remembered another one: "true or false, wiremold requires a wire type EGC"

False.

In my opinion, a properly-installed Wiremold assembly is as good as EMT.

 

[darekelec]

Wiremold box requires a wire type jumper from back plate to a device or light fixture

 

[electrofelon]

False.

In my opinion, a properly-installed Wiremold assembly is as good as EMT.

But what I find strange about that as a test question is 250.118(14) specifies "if listed".