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What does suffix 1587 mean on Molded Case Switch part numbers like LHL36000M1587?

Part Number Identification

Product Line:
Molded Case Switch

Suffix 1587 is a proprietary suffix for Trane Company. It means that this molded case switch has special lugs tapped for control wire terminations on the OFF end. The control wire terminations are field installable; order catalog number AL400LAT.
The ON end has power distribution connectors PDC6LA20. 
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