[Code of Federal Regulations]
[Title 49, Volume 4]
[Revised as of October 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR236.9]

[Page 543]
 
                        TITLE 49--TRANSPORTATION
 
       CHAPTER II--FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF 
                             TRANSPORTATION
 
PART 236_RULES, STANDARDS, AND INSTRUCTIONS GOVERNING THE INSTALLATION, 
 
              Subpart A_Rules and Instructions: All Systems
 
Sec. 236.9  Selection of circuits through indicating or annunciating instruments.

    Signal control and electric locking circuits shall not be selected 
through the contacts of instruments designed primarily for indicating or 
annunciating purposes in which an indicating element attached to the 
armature is arranged so that it can in itself cause improper operation 
of the armature.