question on 210.11 c 1-3

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patsfan51

Member
hello,
i am preparing to take my mass. exam. I have some test questions and looking to see if i came about the answer correctly.
Q: Min. number of 20A circuits required for a single dwelling with a 2000 sqft floor area?
A: my answer is 4 -- 2 per section c-1; 1 per section c-2; 1 per section c-3

Is this correct? Is there another way to go about this answer--> 2000 sqft x 3va?

thanks in advance
 

celtic

Senior Member
Location
NJ
Q: Min. number of 20A circuits required for a single dwelling with a 2000 sqft floor area?
A: my answer is 4 --
2 per section c-1;
1 per section c-2;
1 per section c-3

Your answer only covers:
Kitchen
Bath
Laundry

What about the rest of the house?

Is there another way to go about this answer--> 2000 sqft x 3va?

You're onto something...where did the 3va come from?
 
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augie47

Moderator
Staff member
Location
Tennessee
Occupation
State Electrical Inspector (Retired)
Your answer only covers:
Kitchen
Bath
Laundry

What about the rest of the house?



You're onto something...where did the 3va come from?

What else in the house would require a 20 amp circuit ?
(assuming kitchen = kitchen & dining, etc)
 

patsfan51

Member
as far as rest of house, that is where i am getting confused.
the answer options for the question are:
1) 2
2) 3
3) 4
4) 5

i know its not option 1 or 2 since 210.11 C says 4 are required.
I am just need a push to find the extra one to make 5 if that is the case.

as far as 2000 sqft x 3 va --> 6000va / 120v --> 50A/20A (#of cir) --> 3 circuits. this can not be the case because of 210.11 C or I am missing something here as well.
thanks for your help
 

celtic

Senior Member
Location
NJ
as far as rest of house, that is where i am getting confused.

That was exactly what I figured :smile:

Thanks for not letting the cat out of the bag augie
icon14.gif




the answer options for the question are:
1) 2
2) 3
3) 4
4) 5

i know its not option 1 or 2 since 210.11 C says 4 are required.
I am just need a push to find the extra one to make 5 if that is the case.

as far as 2000 sqft x 3 va --> 6000va / 120v --> 50A/20A (#of cir) --> 3 circuits. this can not be the case because of 210.11 C or I am missing something here as well.
thanks for your help

As augie started to say...
What else in the house would require a 20 amp circuit ?

The answer is: nothing.

You were right with the original "guess" of 4.

If the question asked:
Min. number of circuits required for a single dwelling with a 2000 sqft floor area?

You would start with the 4 you originally arrived at, then 2000 sq.ft x 3 va = 6000
...and work it down from there.

BUT...

Your question asked for min REQUIRED 20A ckts.

So yea, I messed with your head a bit.
But now you will remember :smile:
Min number of ckts vs. min number of 20A ckts.
 

patsfan51

Member
Thanks for your help celtic and augie. This forum should be a great resource while prepping for the exam. I think i will be hanging around here for awhile.
 

celtic

Senior Member
Location
NJ
Thanks for your help celtic and augie. This forum should be a great resource while prepping for the exam. I think i will be hanging around here for awhile.

You're welcome....and I think your decision is a good choice :smile:
 

celtic

Senior Member
Location
NJ
Messed with my head too.:D


LOL

I think I got a bunch of people with that :D

For me, it's silly "lessons" like that, that seem to stick with me.
I can just see patsfan51 taking the test...a similar question being asked...and he instantly sees "Murdock" :smile:
 

jumper

Senior Member
LOL

I think I got a bunch of people with that :D

For me, it's silly "lessons" like that, that seem to stick with me.
I can just see patsfan51 taking the test...a similar question being asked...and he instantly sees "Murdock" :smile:

Jumper is going to see Murdock also when he takes his test. Jumper will see him twice if there is a traffic light question.
 

augie47

Moderator
Staff member
Location
Tennessee
Occupation
State Electrical Inspector (Retired)
Thanks for not letting the cat out of the bag augie
icon14.gif


sorry celtic, sometimes your avitar prevents me from knowing that your answer might be a "training session" :D

I'll try to remember not to question your judgement....
 

celtic

Senior Member
Location
NJ
sorry celtic, sometimes your avitar prevents me from knowing that your answer might be a "training session" :D

I'll try to remember not to question your judgement....

Thanks Augie....


I think the general consensus when asked a question by a new user [no offense patsfan] is to ask them for the answer they got - and how/why? - before we all chime in with "correct answers".


....although questioning my judgment is not completely out of line as sometimes I am out of line :grin:
 

patsfan51

Member
yes i think i shall remember that one now.
now to change the question a little since this played with me trying to figure out the answer---

When to use 220.5 (B) -- fraction of an ampere less than .5, such fractions shall be permitted to be dropped.

Do I only drop the fraction when doing load calculations?

Do I keep the fraction when finding number of circuits? ex. min number of 15amp lighting circuits in 2000sqft dwelling? my answer comes to 3.3 circuits. I round this up to four circuits.

Yes?
 
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