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What is the difference between a QO and QOB breaker?

FA121194

2/05/2020

Issue:

What is the difference between a QO and QOB breaker?

Product Line:

QO and QOB

Environment:
Electrical Distribution Systems

Resolution:
A QO breaker is plug on mounting, and can be used in QO load centers, old NQO and NQOD panelboards, and current NQ panelboards. A QOB breaker uses a bolt-on connection to the bus, and can be used in old NQOB and NQOD panelboards, and current NQ panelboards. Otherwise the breakers are the same.