- (a) In dangerously dusty locations, electric motors, switches, and controls shall be of dust-tight construction or enclosed with reasonably dust-tight housing or enclosures. Open-type motors, switches, or controls now in use in tipples and cleaning plants in dusty locations may be continued in use until such dust-tight equipment can be procured or until they can be corrected with reasonably dust-tight housing or enclosures.
- (b) Structures shall be kept free of excessive coal dust accumulations.
- (c) Where coal is dumped at or near air intake openings, reasonable provisions shall be made to prevent the dust from entering the mine.
- (d) Where repairs are being made to the plant, proper scaffolding and proper overhead protection shall be provided for workmen wherever necessary.
- (e) Welding shall not be done in dusty atmosphere or dusty locations, and firefighting apparatus shall be readily available during welding.
(Acts 1949, No. 207, p. 242, §60.)