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What replaces the Q12100 breaker used in obsolete Vertical and Unitized EZ Stack multi-metering device?

Issue:
Is there a suggested replacement for Q12100 breaker in the obsolete EZM or UEZM devices?

Product Line:
Residential metering equipment

Environment:  
Obsolete EZ and UEZ metering devices

Cause:
Maintenance

Resolution:
The 100 ampere Vertical and Unitized EZ Stack devices accepted either QO (through 70 ampere) or Q1 (70 - 100 ampere) tenant breakers.  The Q12100 can be replaced with a QO2100.
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