Title 46
SECTION 108.187
108.187 Ventilation for brush type electric motors in classified spaces.
§ 108.187 Ventilation for brush type electric motors in classified spaces.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.