S-2.1, r. 14 - Regulation respecting occupational health and safety in mines

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234. During the sinking of a shaft, the automatic overspeed protective device of an electrical hoist shall be adjusted so that the speed of the hoist is reduced to less than 30% of the normal operating speed when the bucket is at the lower chair level and less than 3 m (9.8 ft) per second between the lower chair and the bottom of the shaft.
O.C. 213-93, s. 234.