Kentucky Revised Statutes Title XXVIII. Mines and Minerals § 352.050.Permissible rating for underground machinery; transportation of underground mining equipment

(1) After June 16, 1972, no machinery powered by an internal combustion engine shall be placed in use in underground workings unless the equipment is rated “permissible” as described in KRS 352.010 for underground use, and the use of the machinery is approved by the commissioner of the Department for Natural Resources.

(2) Mining equipment being transported or trammed underground, where energized trolley wires or trolley feeder wires are present, other than ordinary sectional movements, shall be transported or trammed by qualified personnel under the supervision of a certified foreman. When the equipment is being transported or trammed, no person, except those persons directly engaged in moving the equipment, shall be permitted to be inby the equipment in the ventilating split that is passing over the equipment. To avoid accidental contact with power lines, face equipment shall be insulated and assemblies removed, if necessary, so as to provide clearance.