CFR > Title 49 - Transportation > SUBTITLE B—Other Regulations Relating to Transportation > CHAPTER II—FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (Parts 200–269) > PART 234—GRADE CROSSING SIGNAL SYSTEM SAFETY AND STATE ACTION PLANS > SUBPART D—Maintenance, Inspection, and Testing (§234.201 to §234.275) > 234.249—Ground tests.

234.249—Ground tests.

A test for grounds on each energy bus furnishing power to circuits that affect the safety of warning system operation shall be made when such energy bus is placed in service and at least once each month thereafter.