C.F.R. » Title 46 » CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY › SUBCHAPTER I-A—MOBILE OFFSHORE DRILLING UNITS › PART 108—DESIGN AND EQUIPMENT › Subpart B—Construction and Arrangement

46 C.F.R. § 108.187

Ventilation for brush type electric motors in classified spaces

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Ventilation for brush type electric motors in classified locations must meet N.F.P.A. 496-1974 “Standard for Purged and Pressurized Enclosures for Electrical Equipment in Hazardous Locations”, except audible and visual alarms may be used if shutting down the motors may cause unsafe conditions.