[Code of Federal Regulations]
[Title 49, Volume 4]
[Revised as of October 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR234.239]

[Page 491]
 
                        TITLE 49--TRANSPORTATION
 
       CHAPTER II--FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF 
                             TRANSPORTATION
 
PART 234--GRADE CROSSING SIGNAL SYSTEM SAFETY--Table of Contents
 
             Subpart D--Maintenance, Inspection, and Testing
 
Sec. 234.239  Tagging of wires and interference of wires or tags with signal apparatus.

    Each wire shall be tagged or otherwise so marked that it can be 
identified at each terminal. Tags and other marks of identification 
shall be made of insulating material and so arranged that tags and wires 
do not interfere with moving parts of the apparatus. This requirement 
applies to each wire at each terminal in all housings including switch 
circuit controllers and terminal or junction boxes. This requirement 
does not apply to flashing light units, gate arm light units and other 
auxiliary light units. The local wiring on a solid state crossing 
controller rack does not require tags if the wiring is an integral part 
of the solid state equipment.