Don't take offence, no harm meant.
Your profile was slim so I have no idea of your level in the trade. Sorry.
408 is for panel boards, not boxes.
definition for deadfront says to cover live parts.
so if you have a deadfront your coverd. if not you need a cover to protect from live parts.
So I interpret that to read: put the panel board in an enclosure and install a deadfront to protect the(people) from live parts. Unless the mfgr. says to install a cover aswell,then thats what I do.
