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UL 891A OUTLINE
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UL 891A OUTLINE 1st Edition, October 14, 2016 Outline of Investigation for Switchboards Rated 601 - 1000 V
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Description / Abstract:
This Standard applies to switchboards nominally rated between 601 and 1000 V for use on circuits having available short-circuit currents of not more than 200 000 A, and intended for use in accordance with the National Electrical Code, ANSI/NFPA 70.