Help with T/C conduit fill

[Dsg319]

I need to do a quick fill calculation and never had to do one using the cable diameter before. I’m using Belden 1118a (single pair shielded). I looked for sizing info on their website and they said the diameter is 0.300in

So how do I use that for circular mills conduit fill calculation.

 

[masterinbama]

I need to do a quick fill calculation and never had to do one using the cable diameter before. I’m using Belden 1118a (single pair shielded). I looked for sizing info on their website and they said the diameter is 0.300in

So how do I use that for circular mills conduit fill calculation.

That's close to the size of #1 THHN.

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[masterinbama]

And through experience I only fill conduits to no more than 25 percent with type TC cable.

They seem to have a higher jam factor


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[Dennis Alwon]

A= pi x r^2

A= .07 sq.in

 

[masterinbama]

A= pi x r^2

A= .07 sq.in

Pi are square?

I always thought that they were round.

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[Dennis Alwon]

Pi are square?

I always thought that they were round.

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Not all of them...lol

 

[Dsg319]

Not all of them...lol

If you don’t mind could you write it out for me so I can see exactly everything you done so I can learn it lol.

 

[Dennis Alwon]

D= .30
1/2 the Diameter is radius so R= .15
R^2= .15 x .15 = .0225

A= R^2 x Pi= .0225 x 3.14= .07

 

[Dsg319]

Thank you!

 

[Dsg319]

D= .30
1/2 the Diameter is radius so R= .15
R^2= .15 x .15 = .0225

A= R^2 x Pi= .0225 x 3.14= .07

So if I done this correctly, 5 belden 1118a cables in a 2”RMC is only 10.2%fill.

I feel as if I’m making a mistake horrible lol

 

[david luchini]

So if I done this correctly, 5 belden 1118a cables in a 2”RMC is only 10.2%fill.

Correct.

 

[Dsg319]

Correct.

Thank you. I was surely hoping I couldn’t mess that up. Lol. I’ll have to write that formula down in my code book cus I don’t rarely have do fill calculations on T/C.

 

[Dsg319]

And through experience I only fill conduits to no more than 25 percent with type TC cable.

They seem to have a higher jam factor


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Yes my delima was wether I could use a standard size 2”seal (25%fill capacity) or have to use a big bulky expanded seal, thankfully I can use a standard 2”seal and cut it in without having to rework the rest of the conduit run.