49 C.F.R. § 236.516 Power supply.
Title 49 - Transportation
Automatic cab signal, train stop, or train control device hereafter installed shall operate from a separate or isolated power supply. [49 FR 3386, Jan. 26, 1984]
Title 49: Transportation
PART 236—RULES, STANDARDS, AND INSTRUCTIONS GOVERNING THE INSTALLATION, INSPECTION, MAINTENANCE, AND REPAIR OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES, AND APPLIANCES
Subpart E—Automatic Train Stop, Train Control and Cab Signal Systems
Standards
§ 236.516 Power supply.