Need Foundation vault for oil filled customer owned pad mount transformer?

zemingduan

Senior Member
Location
Philadelphia,PA
Occupation
Electrical Designer
Do you typically require a foundation vault for oil filled pad mount transformer? Or it is just mounted on a concrete pad on grade? This is not a utility transformer. It is just a customer owned transformer. I know some utility companies such as in our area PECO specifies foundation vault for PECO's pad mount transformer.

Thanks!
 
If the transformer is of any size it needs more than a slab. Have seen a number of slabs where one side sunk enough that the cooling oil could not circulate.
 
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