(a) Whenever self-propelled equipment is used underground, a fire
extinguisher shall be on the equipment. This standard does not apply to
compressed-air powered equipment without inherent fire hazards.
(b) A fire suppression system may be used as an alternative to fire
extinguishers if the system can be manually actuated.
(c) Fire extinguishers or fire suppression systems shall be of a type
and size that can extinguish fires of any class in their early stages which
could originate from the equipment's inherent fire hazards. The fire
extinguishers or the manual actuator for the suppression system shall be
readily accessible to the equipment operator.