30 C.F.R. § 75.902-1 Maximum voltage ground check circuits.
Title 30 - Mineral Resources
The maximum voltage used for such ground check circuits shall not exceed 40 volts.
Title 30: Mineral Resources
PART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES
Subpart J—Underground Low- and Medium-Voltage Alternating Current Circuits
§ 75.902-1 Maximum voltage ground check circuits.
