Conductor Code Question

Status
Not open for further replies.
W

WeisD

Member
Location
Colorado Springs, Colorado
One of my students received this code question in an online practice quiz and I want to see how many other agree with my interpretation of the answer.
My student chose #12 as the correct answer, his answer came back as incorrect. According to quiz the answer is C.# 8, I disagree, any thoughts on this?

What is the minimum size solid conductor permitted to be installed in a raceway.

A. #12

B. #10

C. #8

D. #6
 
I think the appropriate code reference is 310.106(C). But I also think the person who wrote the question did not understand that article. It requires #8 and above to be stranded, when the wire is installed in a raceway. But I don't know of any requirement that a wire must be a minimum size, in order to be solid and to be in a raceway.

Welcome to the forum.
 
I agree. I don't care for the wording but I would have picked "C" as that somewhat fit.
(310.3 in '08 Code)
 
I think that the question is incorrect for the answer that were looking for. As written the correct answer is A. Both #10 and #12 solid are permitted, #12 is smaller making it the minimum from the list.
 
IMO, the question should read " What is the maximum size solid conductor permitted to be installed in a raceway". There would be no issue with that
 
WeisD said:
One of my students received this code question in an online practice quiz and I want to see how many other agree with my interpretation of the answer.
My student chose #12 as the correct answer, his answer came back as incorrect. According to quiz the answer is C.# 8, I disagree, any thoughts on this?

What is the minimum size solid conductor permitted to be installed in a raceway.

A. #12

B. #10

C. #8

D. #6
Click to expand...


#12 is the minimum of those sizes, and you are permitted to install solid #14 in a raceway. So this is probably a mistake on the problem author's part.

It doesn't help that gauge numbers are backwards from sizes. Usually min and max refer to the physical sizes, and not the gauge numbers.


I think what they meant to ask is "what is the minimum size required to be stranded, if in a raceway?". That's the only way you can ask this question and get #8 as an answer.
 
Carultch said:
I think what they meant to ask is "what is the minimum size required to be stranded, if in a raceway?". That's the only way you can ask this question and get #8 as an answer.
Click to expand...


How is number 8 awg the minimum size required to be stranded in a raceway? I see that as ambiguous although I understand what you mean.
 
(C) Stranded Conductors. Where installed in raceways,
conductors 8 AWG and larger, not specifically permitted or
required elsewhere in this Code to be solid, shall be
stranded.

Is this not permitted....

680.23(B)(2)(b) Nonmetallic Conduit. Where a nonmetallic conduit
is used, an 8 AWG insulated solid or stranded copper bonding
jumper shall be installed in this conduit unless a listed
low-voltage lighting system not requiring grounding is
used.


Or is this also not permitted...


680.27(A)(2) Wiring Methods. Rigid metal conduit of brass or other
identified corrosion-resistant metal, liquidtight flexible nonmetallic
conduit (LFNC-B), rigid polyvinyl chloride conduit,
or reinforced thermosetting resin conduit shall extend
from the forming shell to a listed junction box or other
enclosure as provided in 680.24. Where rigid polyvinyl
chloride conduit, reinforced thermosetting resin conduit, or
liquidtight flexible nonmetallic conduit is used, an 8 AWG
insulated solid or stranded copper bonding jumper shall be
installed in this conduit. The bonding jumper shall be terminated
in the forming shell and the junction box. The
termination of the 8 AWG bonding jumper in the forming
shell shall be covered with, or encapsulated in, a listed
potting compound to protect such connection from the possible
deteriorating effect of pool water.

Yeah...I think they are...:angel:
 
Status
Not open for further replies.
Top