[Code of Federal Regulations]
[Title 49, Volume 4]
[Revised as of October 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR236.57]

[Page 494]
 
                        TITLE 49--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--Table of Contents
 
             Subpart A--Rules and Instructions: All Systems
 
Sec. 236.57  Shunt and fouling wires.

    (a) Except as provided in paragraph (b) of this section, shunt wires 
and fouling wires hereafter installed or replaced shall consist of at 
least two discrete conductors, and each shall be of sufficient 
conductivity and maintained in such condition that the track relay will 
be in deenergized position, or device that functions as a track relay 
will be in its most restrictive state, when the circuit is shunted.
    (b) This rule does not apply to shunt wires where track or control 
circuit is opened by the switch circuit controller.

[49 FR 3383, Jan. 26, 1984]