{"data":{"id":"us/49-cfr-236.723","jurisdiction":"us","citation":"49 CFR 236.723","heading":"Circuit, double wire; line.","body":"An electric circuit not employing a common return wire; a circuit formed by individual wires throughout.","path":["Title 49—Transportation","Subtitle B—Other Regulations Relating to Transportation","CHAPTER II—FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","PART 236—RULES, STANDARDS, AND INSTRUCTIONS GOVERNING THE INSTALLATION, INSPECTION, MAINTENANCE, AND REPAIR OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES, AND APPLIANCES","Subpart G—Definitions"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-49.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:34Z","sha256":"642e8f0c7dbbf172fcd507802839e0184a3ba7b4f8a1104770ed7543049641c7","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-236.722","next":"us/49-cfr-236.724"},"notice":"GroundRules: Original legal text. Not legal advice."}