30.10-6a—Category A machinery space—TB/ALL.
The term Category A machinery space means any space and trunks and ducts to such a space that contains:
(b)
Internal combustion machinery used for purposes other than main propulsion where the total aggregate power is at least 500 brake horsepower;
(c)
Internal combustion machinery that uses a fuel that has a flash point of less than 43.3°C (110°F); or