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Is a retaining kit required when you install a QOB3100 in an NQ panel as a backfed main?

Issue:
Retaining kit required when you install a QOB3100 in an NQ panel as a backfed main.

Product Line:
Panelboards

Environment:
Panelboards used in the United States.

Resolution:
An NQ panel does not need a main breaker retaining kit like those used in load centers since the QOB is a bolt-on breaker.