"Permissible equipment." As applied to electric face equipment, all electrically operated equipment taken into or used in or by the last open crosscut of an entry or a room of any coal mine the electrical parts of which equipment, including, but not limited to, associated electrical equipment, components and accessories, are designed, constructed and installed in accordance with the specifications of MSHA to assure that the equipment will not cause a mine explosion or mine fire, and the other features of which are designed and constructed, in accordance with the specifications of the Department of Environmental Protection, to prevent, to the greatest extent possible, other accidents in the use of the equipment.
52 P.S. § 690-350