Splice

L

Lordczr

Member
Location
Southern Shores, NC
Occupation
Electrician
I took my North Carolina Exam. A question I have,is one the you have explained, but everyone (3) different master Electricians I have asked this to have given a different answer.
Appreciate the Explanation

Here it goes:

You have a 21 cu. LB with 3 - 8awg wires, how many splices are allowed?
 
Lordczr said:
Here it goes:

You have a 21 cu. LB with 3 - 8awg wires, how many splices are allowed?
Click to expand...
I'm not sure if the question can be answered as written. Here's a hint as to the calculation. Splices are allowed in a conduit body when the cu inch area is marked on the conduit body. Table 314.16(B) says that each #8 AWG conductor requires 3.0 square inches of volume.
 
infinity said:
I'm not sure if the question can be answered as written. Here's a hint as to the calculation. Splices are allowed in a conduit body when the cu inch area is marked on the conduit body. Table 314.16(B) says that each #8 AWG conductor requires 3.0 square inches of volume.
Click to expand...
Square inches of volume??? :unsure:
 
Lordczr said:
I took my North Carolina Exam. A question I have,is one the you have explained, but everyone (3) different master Electricians I have asked this to have given a different answer.
Appreciate the Explanation

Here it goes:

You have a 21 cu. LB with 3 - 8awg wires, how many splices are allowed?
Click to expand...
The LB is listed 21 CU. It was a picture of this LB and has 3 - #8 passing through and that is how the question was asked.
Selection of Answers:
A) 2
B) 3
C) 4
D) none
 
Lordczr said:
The LB is listed 21 CU. It was a picture of this LB and has 3 - #8 passing through and that is how the question was asked.
Selection of Answers:
A) 2
B) 3
C) 4
D) none
Click to expand...
That is a horribly written question that requires you to try and assume what they're actually asking. Let's assume the they're asking about splicing the 3-#8 conductors instead of pulling them straight through.

One splice would require 6 cubic inches (3+3)
Two splices would require 12 cubic inches (6*2)
Three splices would require 18 cubic inches (6*3)

By splicing the 6-#8's instead of pulling them through you would need 18 cubic inches in the conduit body. If you have a marked volume of 21 cubic inches I would go with (B).
 
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