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Can 3/4" Liquid Tight Non Metallic Flexible Conduit be run inside a PVC Sch 40 and buried 18" below ground for extra water tight for electrical wires (3 of 6awg and 1 of 10g bare copper)?

The length is about 50ft.

Update

I completed the job running flex conduit through the crawlspace and siding to the conduit body then dig 45ft trench 18" deep, running in gray pvc conduit to the Pedestal and passed rough in inspection the first time. The Final failed because i have to ground the metal pedestal to ground 2 ground rods.

Michael Karas
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wyciwug
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2 Answers2

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Can you?

Yes, if the PVC is big enough to get the Liquid Tight through it. (It'll need to be REALLY big to get that through there!)

The real question is:

why would you want to?

You will not be keeping your actual wires dry by doing this. You're still going to need to run UF-B (no, really, please don't do this it's a total waste of time, money & effort, but it is code legal), or individual THHN-2/THWN wires through your conduit whether you've got the Liquid Tight in there or not.

Simply bury your PVC (use the appropriate size for your wires) and pull your individual wires through and be done with it.

You'll save money. You'll save time. You'll significantly reduce your frustration level. You'll regret trying to get the Liquid Tight through there within about 3 minutes of starting, probably sooner.

FreeMan
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In a nutshell, NO. The problem you'll have is making the connections into a box or panel. The non metallic connectors are large and won't allow a PVC connector to then be mounted into the box or panel.

JACK
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