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Can an N250SFBKC sub-feed circuit breaker kit be added to a 400/600A NF panelboard if only a single sub-feed circuit breaker is required?

Issue:
Can an N250SFBKC subfeed circuit breaker kit be added to a 400/600A NF panelboard if only a single subfeed circuit breaker is required?

Product Line:
NF panelboards and accessories sold and supported in the USA.

Environment:
Maintenance/repair

Cause:
Possible addition of N250SFBKC to an existing 400/600A NF panelboard.

Resolution:
The N250SFBKC was designed to be installed on a 250A NF maximum interior only. However, it is now obsolete, with no replacement. In addition, the N600SFBKC is also obsolete with no replacement.   





 
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