[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: 49CFR234.267]



[Page 577]

 

                        TITLE 49--TRANSPORTATION

 

       CHAPTER II--FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF 

                             TRANSPORTATION

 

PART 234_GRADE CROSSING SIGNAL SYSTEM SAFETY--Table of Contents

 

             Subpart D_Maintenance, Inspection, and Testing

 

Sec. 234.267  Insulation resistance tests, wires in trunking and cables.



    (a) Insulation resistance tests shall be made when wires or cables 

are installed and at least once every ten years thereafter.

    (b) Insulation resistance tests shall be made between all conductors 

and ground, between conductors in each multiple conductor cable, and 

between conductors in trunking. Insulation resistance tests shall be 

performed when wires, cables, and insulation are dry.

    (c) Subject to paragraph (d) of this section, when insulation 

resistance of wire or cable is found to be less than 500,000 ohms, 

prompt action shall be taken to repair or replace the defective wire or 

cable. Until such defective wire or cable is replaced, insulation 

resistance tests shall be made annually.

    (d) A circuit with a conductor having an insulation resistance of 

less than 200,000 ohms shall not be used.

    (e) Required insulation resistance testing that does not conform to 

the required testing schedule of this section shall be completed in 

accordance with the following schedule:

    (1) Not less than 50% by the end of calendar year 1996;

    (2) Not less than a total of 75% by the end of calendar year 1997; 

and

    (3) One hundred percent by the end of calendar year 1998.