[Code of Federal Regulations]

[Title 46, Volume 4]

[Revised as of October 1, 2006]

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

[CITE: 46CFR111.105-11]



[Page 245]

 

                            TITLE 46_SHIPPING



                  (This book contains parts 90 to 139)

 

   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (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]



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