Need help

[Nichole35]

I need help answering my conduit fill test I need help pasting this text ...............................

 

[ActionDave]

You need to add some more info before anyone can help.

 

[LarryFine]

Welcome to the forum.

You'll find that we won't simply answer questions like this, but we will encourage you to try to answer them yourself, and we'll gladly guide you. You know, the proverbial fish.

 

[TwoBlocked]

I need help answering my conduit fill test I need help pasting this text ...............................

Myself, I'd be more willing to help someone trying to understand something, than someone trying to answer questions from a test. There is a difference.

So what part of determining conduit fill do you want to understand better?

 

[ggunn]

A common error in this calculation is using the information in Table 8 as the conductor cross sectional area. Table 8 shows the cross sectional area of only the metal in the conductor; you need to make the calculation using the total area of the conductor including the insulation. Obviously, the result will be different for different conductor types. Perhaps ironically, the result isn't different for copper vs aluminum conductors.

 

[don_resqcapt19]

A common error in this calculation is using the information in Table 8 as the conductor cross sectional area. Table 8 shows the cross sectional area of only the metal in the conductor; you need to make the calculation using the total area of the conductor including the insulation. Obviously, the result will be different for different conductor types. Perhaps ironically, the result isn't different for copper vs aluminum conductors.

Table 5 is used for this purpose, or where the cable or conductor is not found in that table, you use the manufacturer's data.

 

[ggunn]

Table 5 is used for this purpose, or where the cable or conductor is not found in that table, you use the manufacturer's data.

Of course.

 

[TX+ MASTER#4544]

2023 NEC
Use Chapter 9, Tables 5 and the Approximate Area Column to determine the square inch(in.² area of a conductor.
Use this table when you have various sizes of conductors in a raceway.

If all conductors are the same size and type of insulation you can get a quicker answer from Informative Annex C (over in back of Code book)
For fixture wires ,too.
See the first page of IA of C for a table with various types of raceways.
Watch out for the asterick * see the foot note.
Then you use Table(s) 4 found in Chapter 9.
Typically, you'll use the Over 2 Wires at a 40 % fill and the in² column to get the total square inch areas.
For nipple fill you use the 60% Column. A conduit nipple is 24 inches or less.
A raceway is any thing beyond 24 inches, Chapter 9 Table 1 and Note(s) (4) for tubing nipples.

Now go pass that test and let us know.

Thanks for reading.
Comments accepted.
TX+MASTER#4544