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How many 125A branch breakers may be installed in a 400A or 600A NF panelboard in a NEMA 3R enclosure?
Issue:
How many 125a breakers may be installed in NQ or NF, 400a, 600a, 3R enclosure?

Product Line:
Panelboards.

Environment:
Products sold in the United States.

Cause:
Product application.

Resolution:
A maximum of (1) one branch device over 110A may be installed on 400/600A panelboards in non-vented applications (NEMA 3R, 12, 4, 4X, etc.)

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