MCC Technical Reference Library
Sizing tables and identification references for motor control center work, the numbers we use to build and quote buckets every day, published for the trade.
VFD Retrofit Feeder Sizing
From starter bucket to wall-mounted drive: motor HP, NEC full-load current, and the feeder breaker and bucket that supply the VFD.
NEMA Starter Sizes (00–9)
Continuous amps and maximum HP at 200/230/460/575 V, the NEMA ICS 2 table with MCC context.
Bucket Size by Amperage
Which unit height a feeder breaker needs, line by line, the rules our configurator quotes from.
MCC Lineup Lookup
Identify your lineup and see the new buckets and renewal parts available for it.
Renewal Parts by Line
Which OEM publishes component-level parts, in which document: handles, stabs, doors, terminal blocks, with part number families.
Breaker Interrupting Ratings (AIC)
Interrupting ratings for the molded-case breaker frames found in legacy MCC buckets.