Can NEMA 3R wireway be mounted vertically and keep the NEMA 3R rating?

Issue:
Will the wireway still be NEMA 3R rated if mounted vertically instead of horizontally.

Product Line:
Wireway

Environment:
Products sold in North America

Cause:
Mounting and installation

Resolution:
The NEMA 3R wireway is only intended for horizontal installation.  Vertical installation would not provide protection from water sources above

Released for:Schneider Electric Canada