[Code of Federal Regulations]

[Title 49, Volume 4]

[Revised as of October 1, 2005]

From the U.S. Government Printing Office via GPO Access

[CITE: 49CFR236.2]



[Page 589]

 

                        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. 236.2  Grounds.



    Each circuit, the functioning of which affects the safety of train 

operations, shall be kept free of any ground or combination of grounds 

which will permit a flow of current equal to or in excess of 75 percent 

of the release value of any relay or other electromagnetic device in the 

circuit, except circuits which include any track rail and except the 

common return wires of single-wire, single-break, signal control 

circuits using a grounded common, and alternating current power 

distribution circuits which are grounded in the interest of safety.