30 C.F.R. § 77.807-3 Movement of equipment; minimum distance from high-voltage lines.
Title 30 - Mineral Resources
When any part of any equipment operated on the surface of any coal mine is required to pass under or by any energized high-voltage powerline and the clearance between such equipment and powerline is less than that specified in §77.807–2 for booms and masts, such powerlines shall be deenergized or other precautions shall be taken.
Title 30: Mineral Resources
PART 77—MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK AREAS OF UNDERGROUND COAL MINES
Subpart I—Surface High-Voltage Distribution
§ 77.807-3 Movement of equipment; minimum distance from high-voltage lines.

