US lawFederal (United States)RegulationsTitle 46 CFR — ShippingChapter I — COAST GUARD, DEPARTMENT OF HOMELAND SECURITYPart 111 — ELECTRIC SYSTEMS—GENERAL REQUIREMENTSSubpart 111.20—Transformer Construction, Installation, and Protection111.20-1046 C.F.R. § 111.20-10Autotransformers.Last amended: 2016Year: 2026Length: 9 wordsOfficial source Cite as 46 C.F.R. § 111.20-10 (2026)An autotransformer must not supply feeders or branch circuits.Previous46 C.F.R. § 111.20-5Next46 C.F.R. § 111.20-15