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

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253.2. An automated hoist installed as of 26 November 2015 must be equipped with a monitoring system for the load conveyed.
The load monitoring system must open the safety circuit when the load on the rope reaches, over all the distance of the travel, the following values in either situation:
(1)  slack rope situation:
the load is less than 60% of the weight of the empty conveyance;
(2)  tensed rope situation:
the load exceeds the maximum static load on the rope plus a load corresponding to 10% of the rope’s initial breaking strength.
The opening of the safety circuit must immobilize the hoist by cutting off the power supply to the motor and by automatically applying the brakes.
O.C. 966-2015, s. 4.