Okla. Stat. tit. 45, § 45-523: Machines to be shielded - Electric pumps

In mines where mining machines are used, each machine shall be

equipped and provided with a sufficient shield for the protection of

those employed in or about said machines or in the use and operation

thereof, and said shield shall be kept in use constantly while said

machine is being operated. All electric pumps inside of the mine

shall receive careful attention. While in use at a permanent

pumping station, such pumps shall be placed in a fireproof shed,

constructed of masonry walls.