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

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536. The tracks, in a trolley transport system, are used for current return shall be electrically bonded by linkages at the switches, the frogs and other openings in order to provide electrical continuity for the rails. In addition, cross bonding shall be installed between the 2 rails at not more than 60 m (196.9 ft) intervals.
O.C. 213-93, s. 536.