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What is the meaning of Form R172 for 8536s and 8502s
Issue:
What is the meaning of Form R172 when used as a suffix on a starter catalog number?

Product Line:
NEMA and Definite Purpose Contactors and Starters

Environment:
Type S Contactors and starters

Resolution:
Form R172 used to be a Form for addition of a two pole control relay. R172 is now obsolete, and is replaced by form R174 which will add a four pole relay.

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