C.F.R. » Title 30 » CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR › SUBCHAPTER O—COAL MINE SAFETY AND HEALTH › PART 77—MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK AREAS OF UNDERGROUND COAL MINES › Subpart J—Low- and Medium-Voltage Alternating Current Circuits

30 C.F.R. § 77.905

Connection of single-phase loads

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Single-phase loads shall be connected phase-to-phase in resistance grounded systems.