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U.S. Department of Labor Mine Safety and Health Administration Protecting Miners' Safety and Health Since 1978 |
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30 CFR § 18.14
Identification of tested noncertified explosion-proof enclosures.
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 1/4 inch in height, enclosed in a circle not
less than 1 inch in diameter. [33 FR 4660, Mar. 19, 1968, as amended at 43 FR 12314, Mar. 24, 1978] |
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