[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: 49CFR236.56]

[Page 508]
 
                        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. 236.56  Shunting sensitivity.

    Each track circuit controlling home signal or approach locking shall 
be so maintained that track relay is in deenergized position, or device 
that functions as a track relay shall be in its most restrictive state 
if, when track circuit is dry, a shunt of 0.06 ohm resistance is 
connected across the track rails of the circuit, including fouling 
sections of turnouts.

[49 FR 3383, Jan. 26, 1984]