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Can I install a 200A subfeed breaker into a 400A NF panelboard?

Issue:
Can I install a 200A subfeed breaker into a 400A NF panelboard?

Product Line:
NF Panelboard

Environment:
Application

Cause:
Add in the Field

Resolution:
A NF600SFBJ Sub feed Breaker kit would allow a J*L36200 circuit breaker to be sub fed out of the Panel, opposite end of the Mains.
Note: Back box size must be increased, refer to the NF panelboard section of the current Digest for box selection, see copy of Digest 176, page 9-14, Tables 9.52 and 9.53  below:

                                                                                              



 
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