[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: 49CFR236.106]

[Page 509]
 
                        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. 236.106  Relays.

    Each relay, the functioning of which affects the safety of train 
operations, shall be tested at least once every four years except:
    (a) Alternating current centrifugal type relay shall be tested at 
least once every 12 months;
    (b) Alternating current vane type relay and direct current polar 
type relay shall be tested at least once every 2 years; and
    (c) Relay with soft iron magnetic structure shall be tested at least 
once every 2 years.

[49 FR 3384, Jan. 26, 1984]