Ohio Revised Code Search

...Where direct current is used underground in mines, the following rules shall govern: (A) In determining the voltage limit the difference in potential shall not exceed three hundred twenty-five volts measured by a meter at the nearest switchboard except with the written approval of the chief of the division of mineral resources management. (B) For the protection of circuits, a switch and circuit breaker shall be ins...

...When alternating current is used underground in mines, the following rules apply: (A) On all low voltage circuits all wires shall be protected by a switch and an automatic overload circuit breaker on each wire of the circuit, except that fuses may be substituted for circuit breakers in the case of lighting circuits and in the case of power circuits transmitting twenty-five kilowatts or less. All wires shall be insu...

...At all stripping mines where alternating current is used to operate shovels or to convert alternating current to direct current, and where the machines used for this purpose are installed on the shovel or building attached thereto, or where armored cables are used to conduct the current from the main transmission line to the shovel, all machines and armored cables so installed or used shall be grounded in a manner ap...

...The frame and bed plates of generators, transformers, motors other than low voltage mobile motors, and all metallic cable covering other than trailing cables, shall be efficiently grounded. No owner, lessee, agent, or operator of a mine shall violate this section.

...In gaseous mines or portions of mines as defined by section 1563.02 of the Revised Code, a sufficient number of shot firers shall be employed. The shot firer shall charge, tamp, and fire all holes properly placed, and refuse to charge any holes not properly placed. Whenever such shot firers are required to be employed, it shall be unlawful for any one other than a shot firer to charge, tamp, or fire any blast within ...

...In all gaseous mines, as defined in section 1563.02 of the Revised Code, no black powder shall be used for blasting coal and all shots shall be fired by a shot firer. No owner, lessee, agent, or operator of a mine shall violate this section.

...No employee, worker, or miner shall have in the employee's, worker's, or miner's possession inside of an underground mine more than one twenty-five pound keg or box of blasting powder or other explosives. Every person who has powder or other explosives in an underground mine shall keep the same in a wooden box suitable to contain the original container of such explosive. Such box shall be kept at all times at least t...

...Blasting powder or explosives shall not be taken into or out of a mine, or moved from place to place in a mine, along any entry or haulway where there are electric wires, while the power is on such wires, except when such powder or explosive is conveyed in insulated cars, boxes, or packages. No operator, or miner shall refuse or neglect to comply with this section.

...Whenever a workman is about to open a box, package, or keg, containing powder or other explosives, and while handling the same, he shall place and keep his lamp at least five feet distant from such explosives, and in such a position that the air current cannot convey sparks to it. No person shall approach nearer than five feet to any box, keg, or package, containing powder or other explosives, or within five feet of ...

...Powder, explosives, and working tools shall not be taken down or up a hoisting shaft in a cage when men are going down or up, nor shall such articles be taken down or up a stairway used for ingress and egress of persons. No miner or owner, lessee, agent, or operator of a mine shall violate this section.

...No employee in a mine, who is about to fire a shot with a squib, shall shorten the fuse, saturate it with oil, or ignite it, except at the extreme end; he shall see that all persons are out of danger from the probable effects of such shot, and if it is a rib shot, he shall notify the persons working next to him on said rib before firing said shot, and shall take measures to prevent anyone approaching by shouting "fir...

...At a mine where the firing of shots is restricted to specific times, no miner shall fire a shot until the time appointed for him to do so, and then only in such rotation as designated.