Are the resin encapsulated transformers allowed to be mounted on the wall upside down, flat on the back or sideways?

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Issue:
Can sealed resin, epoxy enclosed transformers, laid flat on their back, mounted horizontally, side ways, on the side or upside down?

Product Line:
transformers

Environment:
Resin-encapsulated Transformer
buck boost

Resolution:
No. Mounting encapsulated transformers any other way than vertical is not supported due to the heat that it produces, and will void the N3R rating.