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Can a customer use a QO type bolt-on branch breaker for use as a back fed main in a Three phase QO load center?

FA95330

23 January 2021

Issue:
Product Design Features

Product Line:
QO load centers

Environment:
Branch breakers

Cause:
Application

Resolution:
QO Load centers, both single phase and three phase are ONLY designed to accept QO Plug-On Type branch breakers. So a Bolt-on type branch breaker CANNOT be installed into the QO load centers.

NOTE: For a back-fed application in a QO load center (1-phase and 3-phase), a Plug-ON type branch breaker must be used. Also, the correct retaining kit part number MUST be used for compliance with the National Electrical Code (NEC).