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?

Search FAQs

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.