30 C.F.R. § 18.14 Identification of tested noncertified explosion-proof enclosures.
Title 30 - Mineral Resources
An enclosure that meets all applicable requirements of this part, but has not been certified by MSHA, shall be identified by a permanent marking on it in a conspicuous location. The design of such marking shall consist of capital letters USMSHA not less than [33 FR 4660, Mar. 19, 1968, as amended at 43 FR 12314, Mar. 24, 1978] st
Title 30: Mineral Resources
PART 18—ELECTRIC MOTOR-DRIVEN MINE EQUIPMENT AND ACCESSORIES
Subpart A—General Provisions
§ 18.14 Identification of tested noncertified explosion-proof enclosures.
