What gauge steel is used for the standard NEMA 1 I-Line panel enclosures ?

Issue:
For Nema 1 I-line panel enclosures, What is the gauge of steel used?

Product Line:
I-line panelboards

Environment:
Products sold and used in the United States

Cause:
Product Features

Resolution:
HCN and HCM boxes are 13 gauge ; all others are 12 gauge .

Released for: Schneider Electric USA