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NQOB Panelboards and Branch Circuit Breakers

What branch breakers does the obsolete NQOB panelboard accept?  Is there any mounting hardware required for them?

Product Line:
Obsolete NQOB Panelboards.

Obsolete NQOB panelboards that were sold and supported in the USA.

Are branch breakers still available for the obsolete NQOB panelboards?

NQOB panelboards accept QOB branch breakers, and a 60A maximum branch circuit breaker can be installed into NQOB column width panelboard.  No mounting hardware is required for these.
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