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Can a QO2150, QO2175, QO2200 or QO2225SL be used in a 300 ampere or 400 ampere QON load center?

Issue:
Product Design Features

Product Line:
QO load centers and branch breakers

Environment:
Branch breaker

Cause:
Application

Resolution:

Yes, they can be used in QONQ, 300 and 400 ampere load centers (single phase only) for new installations. In existing(or older) installations, QON, 300 - 400 ampere, single phase loadcenters, when mounted in a MH50 box (using a MHC50VF or MHC50VS cover), or when mounted in a MH53 box (using a MHC53VF or MHC53VS cover), the cover should be replaced with MHC50QVF, MHC50QVS, MHC53QVF or MHC53QVS, if over 10,000 amps fault current is available. If less than 10,000 amps fault current is available, the cover would not require replacement. If mounted in MH68 box with MHC68VF or MHC68VS cover, no replacement cover would be required, regardless of fault current available.

NOTE: THESE BREAKERS CANNOT BE INSTALLED IN 3-PHASE LOAD CENTERS OR PANELBOARDS IN ANY CIRCUMSTANCE.


CTA-ID : 2007948
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