[Code of Federal Regulations]
[Title 46, Volume 4]
[Revised as of October 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 46CFR111.105-11]

[Page 247]
 
                           TITLE 46--SHIPPING
 
    CHAPTER I--COAST GUARD, DEPARTMENT OF TRANSPORTATION (CONTINUED)
 
PART 111--ELECTRIC SYSTEMS--GENERAL REQUIREMENTS--Table of Contents
 
                  Subpart 111.105--Hazardous Locations
 
Sec. 111.105-11  Intrinsically safe systems.

    (a) Each system required under this subpart to be intrinsically safe 
must use approved components meeting UL 913 or IEC 79-11(Ia).
    (b) Each electric cable of an intrinsically safe system must--
    (1) Be 50 mm (2 inches) or more from cable of non-intrinsically safe 
circuits, partitioned by a grounded metal barrier from other non-
intrinsically safe electric cables, or a shielded or metallic armored 
cable; and
    (2) Not contain conductors for non-intrinsically safe systems.
    (c) As part of plan approval, the manufacturer must provide 
appropriate installation instructions and restrictions on approved 
system components. Typical instructions and restrictions include 
information addressing--
    (1) Voltage limitations;
    (2) Allowable cable parameters;
    (3) Maximum length of cable permitted;
    (4) Ability of system to accept passive devices;
    (5) Acceptability of interconnections with conductors or other 
equipment for other intrinsically safe circuits; and
    (6) Information regarding any instructions or restrictions which 
were a condition of approval of the system or its components.
    (d) Each intrinsically safe system must meet ISA RP 12.6, except 
Appendix A.1.

[CGD 94-108, 61 FR 28284, June 4, 1996, as amended at 62 FR 23909, May 
1, 1997]