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What main breaker frame sizes are used in the HCR548612U interior?

Issue:
What size main breakers can be used in the HCRU 1200A I-line panel?

Product Line:
Panelboards

Environment:
I-Line HCR

Cause:
Selection

Resolution:
This accommodates a branch-located main breaker; either an old NA, NC, or NX or newer Powerpact P frame (PG, PJ , PL ,PGC , PJC , or PLC ) or Powerpact R frame (RGC , RJC, or RLC ) .