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Title 30: Mineral Resources
CHAPTER I: MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
SUBCHAPTER O: COAL MINE SAFETY AND HEALTH
PART 75: MANDATORY SAFETY STANDARDS-UNDERGROUND COAL MINES
Subpart I: Underground High-Voltage Distribution
75.806 - Connection of single-phase loads.
[Statutory Provisions]
Single-phase loads, such as transformer primaries, shall be connected phase-to-phase.
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