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Do you have to use a Star washer to ground a 9070 Control transformer ground?

Published date: 18 May 2020

Issue:
An installer had been told by an electrical engineer to ground a 9070 Type T transformer frame to the enclosure using a star washer.  If this is so important, why does Schneider plate the base of the transformer?

Product Line:
9070 Type T Control transformers

Environment:
all

Cause:
Grounding

Resolution:
The 9070s base is plated to keep it from rusting. Schneider does not provide grounding provisions on transformer.  Grounding is the responsibility of the installer to meet both local and NEC code requirements.
 

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