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Is the 24 Vdc power supply for Micrologic trip units supposed to be grounded or ungrounded?

Issue:
Does it matter whether the 24Vdc power supply for Micrologic Trip Units is grounded or ungrounded?

Product Line:
Micrologic Trip Units

Resolution:
The attached document, 48041-084-01, is included in the carton with the Micrologic trip units. On the second page, it states that the 24 Vdc power must not be grounded.