(a) Each system required by this subpart to be intrinsically safe must use approved components meeting UL 913 or IEC 60079-11 (both incorporated by reference; see 46 CFR 110.10-1).
(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 (incorporated by reference, see 46 CFR 110.10-1), except Appendix A.1.
[CGD 94-108, 61 FR 28284, June 4, 1996, as amended at 62 FR 23909, May 1, 1997; USCG-2003-16630, 73 FR 65200, Oct. 31, 2008]