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Old 09-05-2010, 11:31 AM   #1
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UF through pvc


Hey folks,
I was planning on running UF (12-3) through a few feet of pvc to get from the junction box inside my house, under the stairs to an LB. When buying the UF, the (admittedly unsure) salesman said "you can't put UF through pvc, it gets too hot." Now, I need to put it through some sort of pipe to get from the lb into the ground anyway, so I just wanted to make sure that UF 12-3 is going to be ok through a few feet of 3/4 pvc.
thanks!
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Old 09-05-2010, 11:56 AM   #2
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12-3 can be installed in conduit
Its harder to pull.....but a few feet should not be a problem
You use diameter of the 12-3 to size conduit... .345"
So 1/2" conduit would be the min for ~33% fill
Using 3/4" would be fine



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Old 09-05-2010, 12:03 PM   #3
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Excellent. Thanks much Dave.
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Old 09-05-2010, 02:00 PM   #4
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To be code compliant you will need a minimum 1" pipe for 12-3 UF CABLE which has an elliptical diameter of .626 inches.
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Old 09-05-2010, 03:11 PM   #5
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Quote:
Originally Posted by brric View Post
To be code compliant you will need a minimum 1" pipe for 12-3 UF CABLE which has an elliptical diameter of .626 inches.
Yup....I looked at the size for reg 12-3...not UF
Sorry



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Old 09-05-2010, 08:12 PM   #6
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no worries, you caught me before I left for osh. all good. thanks both of you.
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Old 09-05-2010, 09:13 PM   #7
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Make sure you get gray pvc conduit...not white pvc pipe used for plumbing.
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Old 09-06-2010, 12:56 AM   #8
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Few feet of conduit is not going to hurt anything due it will help you to protect the UF cable as other poster warn ya with diamater it will get ya off track due the UF cable is always flat never round. { that something super rare to see them in round verison anyway }

But make sure you leave little slack on the bottom due the weather change like frost etc { if you live in northen frezzing area }

And make sure the conduit is deburred { no sharp edges } so it will not cut the UF cable.

Merci.
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