30 C.F.R. § 77.601 Trailing cables or portable cables; temporary splices.
Title 30 - Mineral Resources
Temporary splices in trailing cables or portable cables shall be made in a workmanlike manner and shall be mechanically strong and well insulated. Trailing cables or portable cables with exposed wires or splices that heat or spark under load shall not be used.
Title 30: Mineral Resources
PART 77—MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK AREAS OF UNDERGROUND COAL MINES
Subpart G—Trailing Cables
§ 77.601 Trailing cables or portable cables; temporary splices.

