Section 690-317 - Inspection of equipment(a) Inspection required.--All electrical equipment shall be inspected by the mine electrician or individual designated by the mine electrician weekly and, where necessary, shall be cleaned and repaired.(b) Removal of coal dust.--All electric motors and cables in mechanical sections shall have all excessive coal dust removed from their exterior surfaces once each operating shift.2008, July 7, P.L. 654, No. 55, §317, effective in 180 days [ 1/5/2009].