Unless otherwise stated, electrical equipment must function at variations of at least ±5 percent of rated frequency and + 6 percent to −10 percent of rated voltage. This limitation does not address transient conditions. [CGD 94-108, 61 FR 28276, June 4, 1996]
TL;DR
Unless otherwise stated, electrical equipment must function at variations of at least ±5 percent of rated frequency and + 6 percent to −10 percent of rated voltage. This limitation does not address transient conditions.
Section 111.01-17 — full text
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