Why MCC buckets sell when the structure does not

Plate 01

The buckets are the product

The removable units — combination starters, feeder breakers, variable frequency drives, soft starters, lighting panels — are individually cataloged devices with their own aftermarket. Plants running the same MCC family need matching buckets when one fails, and for discontinued families the only source is other buildings.

The structure itself, meaning the enclosure and bus, has value mostly when a buyer needs matching sections to extend an existing line-up, or on recovery value for the copper bus. So the usual arithmetic on an MCC is: buckets at reuse value, structure at whichever is higher between matching-section demand and metal.

Plate 02

What raises bucket value

Complete units with their starters, overloads, control transformers and operators intact. Legible unit nameplates. Common NEMA starter sizes, particularly size 1 through size 4, which cover the bulk of industrial motor loads. Drives that are recent enough to still be supported and that power up.

Cannibalized buckets missing their contactors or overloads drop sharply, as do buckets from families with essentially no installed base remaining.

Plate 03

Bus, voltage class and vintage

Horizontal and vertical bus ampacity determines what the structure can support and how much copper is in it. Low-voltage MCCs at 480 V dominate the market. Medium-voltage motor control at 2400 V and 4160 V is a smaller, higher-value market with buyers who need specific configurations.

Vintage cuts both ways, as with switchgear. Old enough to be discontinued but with a large installed base is the sweet spot for parts value. Old enough that nothing is left running is recovery value.

Plate 04

Photographing a line-up properly

Photograph the main nameplate, then every bucket's unit nameplate. On a twenty-section MCC that is a lot of photographs and it is worth every minute, because bucket content is where the money is and a representative sample understates a mixed line-up.

Also photograph the rear if it is accessible, the incoming section, and any drives with their own nameplates and displays. If the line is still energized and a display shows a fault code, photograph that too.