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On a factory assembled NQ panel with a weatherproof MH*WP box, can the factory punch an opening in it to accommodate a specific hub?

Issue:
On a factory assembled NQ panel with a weatherproof  MH*WP box, can the factory punch an opening in it  to accommodate a 3.5`` hub?

Product Line:
PTFDS - FD Enclosure Systems

Environment:
Panelboard enclosure systems sold and supported in the USA.

Cause:
Can the factory install a conduit opening in an MH*WP panelboard backbox to customer specifications? 

Resolution:
On the MH/WP enclosures, the endwalls are shipped blank. The factory is unable to punch holes for the customer, as doing so would void the UL listing on the enclosure as it leaves the factory.
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