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Why can`t you use a NF panelboard on a 480V ungrounded system?

Issue:
Why can`t you use a NF panelboard on a 480V ungrounded system?

Product Line:
Product features.

Environment:
Products sold in the United States.

Cause:
Product features.

Resolution:
Because the breakers have to be used on a grounded system where the voltage to ground does not exceed, 277V +/-5%.


CTA-ID : 2042702
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