§ 154.1010 Electrical equipment in gas-dangerous space or zone.

(a) Except as allowed in this section, electrical equipment must not be installed in a gas-dangerous space or zone. (b) Intrinsically safe electrical equipment and wiring may be in a gas-dangerous space or zone. (c) A submerged cargo pump motor may be in a cargo tank if: (1) Low liquid level, motor current, or pump discharge pressure automatically shuts down power to the pump motor if the pump loses suction; (2) There is an audible and visual alarm at the cargo control station that actuates if the motor shuts down under the requirements of paragraph (c)(1) of this section; and (3) There is a lockable circuit breaker or lockable switch that disconnects the power to the motor. (d) A supply cable for a submerged cargo pump motor may be in a hold space. (e) A hold space that has a tank that is not required to have a secondary barrier under § 154.459 may only have: (1) Through runs of cable; (2) Explosion-proof lighting fixtures; (3) Depth sounding devices in gas-tight enclosures; (4) Log devices in gas-tight enclosures; and (5) Impressed current cathodic protection system electrodes in gas-tight enclosures. (f) A space that is separated by a gastight steel boundary from a hold space that has a cargo tank that must have a secondary barrier, under the requirements of § 154.459, may only have: (1) Through runs of cable; (2) Explosion-proof lighting fixtures; (3) Depth sounding devices in gastight enclosures; (4) Log devices in gastight enclosures; (5) Impressed current cathodic protection system electrodes in gastight enclosures; (6) Explosion-proof motors that operate cargo system valves or ballast system valves; and (7) Explosion-proof bells for general alarm systems. (g) A cargo handling room may only have: (1) Explosion-proof lighting fixtures; and (2) Explosion-proof bells for general alarm systems. (h) A space for cargo hose storage may only have: (1) Explosion-proof lighting fixtures; and (2) Through runs of cable. (i) A space that has cargo piping may only have: (1) Explosion-proof lighting fixtures; and (2) Through runs of cable. (j) A gas-dangerous zone on the weather deck may only have: (1) Explosion-proof equipment that is for the operation of the vessel; and (2) Through runs of cable. (k) A space, except those under paragraphs (e) through (j) of this section, that has a direct opening to a gas-dangerous space or zone may only have the electrical equipment allowed in the gas-dangerous space or zone.