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What type of breaker is used in a NQHB panelboard ?

Are breakers for NQHB panelboards still available?

Product line:
NQHB panelboard

Obsolete NQOB/NQHB panelboard. 

Resolution :
NQHB was a 65 kaic version of the obsolete NQOB Panel.  NQHB panel used the QHB 65kaic,15 to 30amp bolt-on breakers that are still available. .
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