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What does the D9 suffix on the end of MH enclosure catalog number mean?

Issue:
What does the D9 suffix on the end of MH enclosure catalog number mean?

Product Line:
Panelboards

Environment:
Applies to NQ and NF enclosures

Cause:
What does he D9 suffix on the end of MH enclosure catalog number mean?

Resolution:
The D9 suffix means the enclosure will be 9" deep vs standard 5.75"D enclosure
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