30 CFR § 75.506 - Electric face equipment; requirements for permissibility.
(a) Electric-driven mine equipment and accessories manufactured on or after March 30, 1973, will be permissible electric face equipment only (1) if they are fabricated, assembled, or built under an approval, or any extension thereof, issued by the Bureau of Mines or the Mine Safety and Health Administration in accordance with schedule 2G, or any subsequent Bureau of Mines schedule promulgated by the Secretary after March 30, 1970, which amends, modifies, or supersedes the permissibility requirements of schedule 2G, and (2) if they are maintained in a permissible condition.
(b) Except as provided in paragraph (c) of this § 75.506 electric-driven mine equipment and accessories manufactured prior to March 30, 1973, will be permissible electric face equipment (1) if they were fabricated, assembled, or built under an approval, or any extension thereof, issued by the Bureau of Mines in accordance with the schedules set forth below, and (2) if they are maintained in a permissible condition.
(c) Electric driven mine equipment and accessories bearing the Bureau of Mines approval numbers listed in Appendix A to this subpart are permissible electric face equipment only if they are maintained in a permissible condition.
(d) The following equipment will be permissible electric face equipment only if it is approved under the appropriate parts of this chapter, or former Bureau of Mines' approval schedules, and if it is in permissible condition:
(1) Multiple-Shot Blasting Units, part 7 subpart D;
(2) Electric Cap Lamps, part 19;
(3) Electric Mine Lamps Other than Standard Cap Lamps, part 20;
(4) Flame Safety Lamps;
(5) Portable Methane Detectors, part 22;
(6) Telephone and Signaling Devices, part 23;
(7) Single-Shot Blasting Units;
(8) Lighting Equipment for Illuminating Underground Workings;
(9) Methane-Monitoring Systems, part 27; and
(10) Continuous Duty, Warning Light, Portable Methane Detectors, 30 CFR part 29 contained in the 30 CFR, parts 1–199, edition, revised as of July 1, 1999.