US lawFederal (United States)RegulationsTitle 46 CFR — ShippingChapter I — COAST GUARD, DEPARTMENT OF HOMELAND SECURITYPart 113 — COMMUNICATION AND ALARM SYSTEMS AND EQUIPMENTSubpart 113.10—Fire and Smoke Detecting and Alarm Systems113.10-546 C.F.R. § 113.10-5Common return.Last amended: 2016Year: 2026Length: 15 wordsOfficial source Cite as 46 C.F.R. § 113.10-5 (2026)A conductor must not be used as a common return from more than one zone.Previous46 C.F.R. § 113.10-3Next46 C.F.R. § 113.10-7