[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: 49CFR236.108]

[Page 548-549]
 
                        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. 236.108  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.

[[Page 549]]

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]