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If you change the enclosure material from a mild steel to stainless steel on a Transformer enclosure, does that alter the UL listing or the NEMA rating of the enclosure?
Issue:
Stainless Steel Transformer enclosures

Product Line:
LV Transformers

Environment:
Applies to Transformers by SquareD/Schneider Electric

Cause:
Stainless Steel Transformer enclosure NEMA ratings


Resolution:
No, neither the UL listing, nor the NEMA rating of the enclosure changes.  If it is a NEMA 2 enclosure with mild steel, then it will be a NEMA 2 enclosure manufactured out of stainless steel.  The same holds true for NEMA 3R enclosures.  SquareD/Schneider Electric does offer NEMA 4X rated Transformers 25 KVA single phase, 30 KVA three phase.


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