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An installer had been told by an electrical engineer to ground a 9070 Type T control transformer`s frame to the enclosure with a star washer. If this is so important, why does Square D plate the base of the transformer?

The 9070s base is plated to keep it from rusting. Square D does not provide grounding provisions on transformer, as grounding is the responsibility of the installer per NEC requirements.

CTA-ID : 2004182
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