[Code of Federal Regulations]

[Title 49, Volume 4]

[Revised as of October 1, 2006]

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

[CITE: 49CFR236.108]



[Page 610]

 

                        TITLE 49--TRANSPORTATION

 

       CHAPTER II--FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF 

                             TRANSPORTATION

 

PART 236_RULES, STANDARDS, AND INSTRUCTIONS GOVERNING THE 

 

              Subpart A_Rules and Instructions: All Systems

 

Sec.  236.108  Insulation resistance tests, wires in trunking and cables.



    (a) Insulation resistance of wires and cables, except wires 

connected directly to track rails, shall be tested when wires, cables, 

and insulation are dry. Insulation resistance tests shall be made 

between all conductors and ground, and between conductors in each 

multiple conductor cable, and between conductors in trunking, when wires 

or cables are installed and at least once every ten years thereafter.

    (b) Then 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 and until such defective wire or cable is 

replaced, insulation resistance test shall be made annually.

    (c) In no case shall a circuit be permitted to function on a 

conductor having an insulation resistance to ground or between 

conductors of less than 200,000 ohms during the period required for 

repair or replacement.



[49 FR 3384, Jan. 26, 1984]