Can an I Line panel interiors be mounted horizontally instead of vertically?

Issue:
Verify if an I-Line panel interior can be mounted horizontally instead of vertically.

Product Line:
I-Line panelboard sold and supported in the USA.

Environment:
Installation

Cause:
N/A

Resolution:
No, breaker handle orientation would be opposite for half of the breakers and the interior heat rise would not be able to dissipate properly.

Released for: Schneider Electric USA