View all text of Subpart 162.039 [§ 162.039-1 - § 162.039-8]
§ 162.039-2 - Classification.
(a) Portable and semi-portable extinguishers must be marked with a combined number and letter designation. The letter designates the general class of fire for which the extinguisher is suitable as identified in NFPA 10 (incorporated by reference, see § 162.039-1). The number indicates the relative extinguishing potential of the device as rated by UL 711 (incorporated by reference, see § 162.039-1).
(b) [Reserved]