StacksVerified U.S. regulatory reference

46 CFR §111.01-17

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
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.