30 C.F.R. § 57.4502 Battery-charging stations.
Title 30 - Mineral Resources
(a) Battery-charging stations shall be ventilated with a sufficient volume of air to prevent the accumulation of hydrogen gas. (b) Smoking, use of open flames, or other activities that could create an ignition source shall be prohibited at the battery charging station during battery charging. (c) Readily visible signs prohibiting smoking or open flames shall be posted at battery-charging stations during battery charging.
Title 30: Mineral Resources
PART 57—SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES
Subpart C—Fire Prevention and Control
Installation/Construction/Maintenance
§ 57.4502 Battery-charging stations.
