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

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498. The non-magnetic metal sheaths of single-wire cables shall be:
(1)  electrically interconnected and grounded at intervals not exceeding 30 m (98.4 ft);
(2)  grounded only at the supply point and thereafter isolated from ground and from each other.
O.C. 213-93, s. 498.