30 CFR § 18.14 - Identification of tested noncertified explosion-proof enclosures.
---
identifier: "/us/cfr/t30/s18.14"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "30 CFR § 18.14 - Identification of tested noncertified explosion-proof enclosures."
title_number: 30
title_name: "Mineral Resources"
section_number: "18.14"
section_name: "Identification of tested noncertified explosion-proof enclosures."
chapter_name: "MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR"
subchapter_number: "B"
subchapter_name: "TESTING, EVALUATION, AND APPROVAL OF MINING PRODUCTS"
part_number: "18"
part_name: "ELECTRIC MOTOR-DRIVEN MINE EQUIPMENT AND ACCESSORIES"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "30 U.S.C. 957, 961."
regulatory_source: "33 FR 4660, Mar. 19, 1968, unless otherwise noted."
cfr_part: "18"
---
# 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]