For purposes of this section: "approved" means that a device, apparatus, equipment, machinery, or practice employed in the mining of coal has been approved by the commissioner of the Department for Natural Resources or accepted by a nationally or federally recognized testing laboratory or the Department of Labor Mine Safety and Health Administration; "suitable" means a design, material, or installation that meets the requirements of its intended use or that is accepted by a nationally or federally recognized testing laboratory or the Department of Labor Mine Safety and Health Administration.
(1) All electrical equipment and all other electric-driven equipment except intrinsically safe equipment which is taken into or used inby the last open crosscut and in return airways in underground mines shall be permissible. The commissioner or his authorized representative shall reject any modification to mining equipment which would endanger the health or safety of employees.
(2) Headlights shall be properly installed and maintained in a workmanlike manner and working order on all mobile and face equipment at all times the equipment is in operation.
(3) Headlights shall be mounted to provide maximum illumination where it will be most effective and shall be protected from damage by guarding or locations.
(4) At all times when mining equipment is being used, it shall be maintained in safe working order. Electrical equipment and circuits shall be examined and tested in a suitable manner by certified electricians to ensure safe working order.
(5) Combustible materials, grease, lubricants, or flammable liquids shall not be allowed to accumulate where they can create a fire hazard.
(6) All electrical equipment utilized in intake airways outby the last open crosscut shall be maintained in safe operating condition and in accordance with the manufacturer's instructions.