# Thread: Minimum burial depth for PVC

1. Senior Member
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Oct 2008
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## Minimum burial depth for PVC

What is the minimum burry depth for PVC conduit burried undergroud? I have seen a specification of 30" for a ductbank however this particular conduit will not be in a ductbank. Shoud there be at least 24" from grade to the PVC?

2. It can range from 0" under a slab to 30" depending on the circuit. You need to check 300.5

3. In the 2008 NEC, 352.10(G) (PVC Conduit section) refers you back to Table 300.5 (minimum cover requirements, 600V and less). The burial depth of the pipe will depend on what's above it. Table 300.5 Column 3 should give you the answer for PVC.

4. Senior Member
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Originally Posted by ericsherman37
In the 2008 NEC, 352.10(G) (PVC Conduit section) refers you back to Table 300.5 (minimum cover requirements, 600V and less). The burial depth of the pipe will depend on what's above it. Table 300.5 Column 3 should give you the answer for PVC.
The area I will be burying the conduit is on a grassy area beside a parking lot. Because I do not see anything covering a "field" or "grassy area" I believe that I should use the first row in this table for "all locations no specified below" and therefore burry it at least 18" deep

5. Originally Posted by PhaseShift
The area I will be burying the conduit is on a grassy area beside a parking lot. Because I do not see anything covering a "field" or "grassy area" I believe that I should use the first row in this table for "all locations no specified below" and therefore burry it at least 18" deep

That is correct.

6. field ?
don't do like one fellow did me. That 18" is from the top of the dirt, not the top of the field grass

7. Senior Member
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Originally Posted by PhaseShift
...and therefore burry it at least 18" deep
A minor detail. It's 18" of cover, not 18" deep trench (I know you didn't say this).

8. Originally Posted by hardworkingstiff
A minor detail. It's 18" of cover, not 18" deep trench (I know you didn't say this).
Pool panel feeder, I go 20 inches to the top so there are no questions during inspection. Although getting a trench 2 inches deeper here is cake.

9. SEO
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Chris it's easy for you, you have Al.

10. Originally Posted by SEO
Chris it's easy for you, you have Al.
Al is just about starting to catch up with Iwire's presents on this forum.

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