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Is Door in door construction or hinged trims available in a N3R panels?

Issue:
Is Door in door construction or hinged trims available in a N3R panels?

Product Line:
Panelboards.

Environment:
Products sold in the United States.

Cause:
Availability.

Resolution:
The NQ and NF NEMA 3R Door In Door enclosure is only available in one six MH56DD.   See Supplemental Digest #176 page 4-8 table 4.11. 400A NQ or NF are not available.  Those must be changed to I LINE construction.  


 
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