Underground PVC into a transformer C1 D2

[Donald Gorham]

30" deep, concrete encased parallel 4", transitions from below grade pipe way in gasoline refinery C1 D1, to 500 KVA 13.8/480 pad-mount at Non C. Seals at both the pipe way GRC and the GRC stub into the trans? EE says no.

 

[petersonra]

30" deep, concrete encased parallel 4", transitions from below grade pipe way in gasoline refinery C1 D1, to 500 KVA 13.8/480 pad-mount at Non C. Seals at both the pipe way GRC and the GRC stub into the trans? EE says no.

FYI - In the title it says CID2.

maybe the spec prohibits this arrangement.

without knowing any actual details it sounds like this approach meets code.

 

[DonaldSparkyDog]

A little more info...the pipe way is the C1D2 open area below grade level where the conduit transitions from overhead in the refinery process area down to a 90, then through a concrete wall below grade. There is a seal off just before penetrating the wall where RGS nipples connect to concrete encased PVC. The CE PVC runs 90 ft then 90s up into the transformer. The classified area location identification design drawings indicate anything below grade level in this particular area is C1D2. If the PVC is below grade and is sealed on one end at the pipe way I am thinking the run underground is through classified area therefor it requires seals under the transformer also. The transformer is located in a non classified area.