Minimum depth of medium voltage concrete encased PVC?

[RKyleM]

what is the minimum depth that medium voltage (13,200V) PVC conduits encased in concrete with 3 inches of concrete to the dirt from the conduit? is there a minimum? is the depth to the edge of the concrete or the edge of the conduit?

 

[davidbeach]

Probably depends on the applicable code. What code(s) apply?

 

[engsolution2]

in the US under NEC 300.50:

minimum depth for PVC is 18".

You can use rigid to install with only 6" of cover.

Measurement is to top of concrete envelope.

 

[dpc]

18 inches is correct for direct buried conduit. But see the Notes in Table 300.50. If this is within an industrial facility, I believe the cover can be reduced by 6" for each 2" of concrete over the conduit.



David Castor

http://www.cvoes.com