outdoor oil filled transformer

[anbm]

Is outdoor oil filled type transformer required to be drained? i.e. plumbing ystem must be designed to have a drainage system under it?

 

[electrofelon]

Is outdoor oil filled type transformer required to be drained? i.e. plumbing ystem must be designed to have a drainage system under it?

No. However You may find some local regulation or utility requirement requiring oil containment provisions in case of a leak.