C.F.R. » Title 30 » 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 F—Electrical Equipment—General

30 C.F.R. § 75.507

Power connection points

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[Statutory Provisions]

Except where permissible power connection units are used, all power-connection points outby the last open crosscut shall be in intake air.