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Will a QO2100 breaker fit into an NQOD20M100CU panelboard as a back fed main breaker?

Issue:
Will a QO2100 breaker fit into an NQOD20M100CU panelboard as a back fed main breaker?

Product Line:
Panelboards.

Environment:
Products sold in the United States.

Cause:
Maintenance.

Resolution:
It will physically fit but will violate the National Electric Code (NEC) for securing the breaker to the bus. Suggest use only the QOB2100 (bolt-on breaker) as the back fed main breaker.


 
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