Section 690-259 - Conveyor belts and conveyor equipment(a) Specifications.--(1) Except as otherwise provided under paragraph (2), all conveyor entries shall be provided with a minimum width and height of not less than four feet for travel and, in conveyor entries in which track is installed, the minimum amount of clearance width shall not be less than two and one-half feet, which clearance width shall be continuous throughout the entry.(2) In lieu of maintaining four feet of height in conveyor entries, a minimum height of three feet and a minimum width of four feet may be maintained, provided the operator furnishes a mode of conveyance for men and material other than on the conveyor. All such travel space and clearance space shall be kept free of all forms of obstruction underfoot and from electric wires and electric cables. A space of not less than four feet in width shall be provided for travel from the immediate entrance of each working place to the face thereof, which space shall be kept free of all forms of obstruction underfoot and free from electric wires and electric cables.(b) Cross points.--At all points where individuals must of necessity cross conveyors, the conveyor at the point where the crossing is made shall be so arranged that individuals can cross safely and conveniently without coming into contact with the conveyor.(c) Automatic stop control.--Conveyors shall be equipped with an automatic control that will stop the driving motor in case of slipping on the drive pulley, and the control shall be tested each operating shift to ascertain that it is in good operating condition.(d) Electric wires and cables.--All electric wires or electric cables in completed portions of conveyor entries shall be carried on insulators.(e) Control lines.--Control lines shall be installed the full length of the belt.(f) Point-type heat sensors.--Point-type heat sensors shall not be used as the primary type of fire sensors in any mine opened more than six months after the effective date of this section.2008, July 7, P.L. 654, No. 55, §259, effective in 180 days [ 1/5/2009].