US lawFederal (United States)RegulationsTitle 49 CFR — TransportationChapter II — FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATIONPart 236 — RULES, STANDARDS, AND INSTRUCTIONS GOVERNING THE INSTALLATION, INSPECTION, MAINTENANCE, AND REPAIR OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES, AND APPLIANCESSubpart G — Definitions236.82149 C.F.R. § 236.821Switch, sectionalizing.Last amended: 2017Year: 2026Length: 15 wordsOfficial source Cite as 49 C.F.R. § 236.821 (2026)A switch for disconnecting a section of a power line from the source of energy.Previous49 C.F.R. § 236.820aNext49 C.F.R. § 236.822