If you change the material the enclosure of the dry type distribution Transformer from mild steel to stainless steel, does that give you a N4X rating?

Issue:
How are Transformer enclosures rated?

Product Line:
LV Transformers

Environment:
Applies to Low Voltage Transformers by SquareD/Schneider Electric

Cause:
There are various NEMA ratings for different styles of Transformer enclosures


Resolution:
Changing the material the enclosure is manufactured out of does not change the functional design of the enclosure, and hence does not change it`s NEMA rating.  A NEMA 3R encapsulated Transformer made out of stainless steel still has a NEMA 3R rating.  Likewise, a NEMA 2 ventilated Transformer enclosure made out of stainless steel still has a NEMA 2 rating.  A NEMA 2 ventilated stainless steel enclosure can obtain a NEMA 3R rating with the addition of an optional stainless steel weathershield kit.  The stainless steel weathershield kits are recognized in Square D/Schneider Electric's system by adding the ``SS`` suffix to the normal weathershield part number.

SquareD/Schneider Electric does offer NEMA 4X rated transformers as follows:
3ph through 30kVA
1ph through 25kVA
Contact Product Marketing/Support through the Field Office for support.

Released for: Schneider Electric Canada