What is the meaning of the "Y" forms Y181 and Y247 on DP Contactors?

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Issue:
Identify the meaning of the "Y" forms on DP Contactors

Product Line:
Type DP, DPA Contactors and Starters

Environment:
NEMA and Definite Purpose Contactors and Starters

Resolution:
Y181 means bulk packaging.
Y247 means add 2 additional quick connects per power terminal (total of four).