How does one compute the size of pvc schd40 required to install uf cable in?

[GeorgeW]

I am installing outside lights and have to use pvc. I would like to use Uf cable (because I have it). How do I compute the size of pvc required?

 

[iwire]

I am installing outside lights and have to use pvc. I would like to use Uf cable (because I have it). How do I compute the size of pvc required?

See Chapter 9 Tables

Table 1 and Note 5.

Basically you need the OD of the cable and then your allowed a maximum of 53% fill.

 

[1793]

The fomula for the area of a circle is "pi times radius squared".

Measure the widest point of the uf, divide by 2, then square that answer and then multiply by pi, 3.14. Then follow iwire's post.

 

[tryinghard]

I use an Excel calculator for cable:

7/16" Cable = 1/2" Conduit
1/2" Cable = 3/4" Conduit
9/16" Cable = 3/4" Conduit
5/8" Cable = 1" Conduit

 

[Jim W in Tampa]

keep in mind you gotta pull it in complete raceway. Not a fun job i would be oversized on pvc

 

[tryinghard]

It should only take one time wrong to change future installations.

In an industrial environment we often use multiple cables in conduit (tray to device or control), so this calculation gets used as minimum. It is better than guessing or instinct because it reveals a minimum base.