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S-2.1, r. 14 - Regulation respecting occupational health and safety in mines
Section 461
Disposition versions
461. Where a common source of electric power is used to set off explosive charges at more than one work site, the following standards shall be respected:
(1) the short circuit of the main blasting line may not be interrupted before blasting;
(2) a 3-position switch shall be provided for each firing circuit; the switch shall be locked either in the short-circuit position or in the closed position, making it possible to:
(a) short-circuit the circuit;
(b) power the circuit;
(c) test the circuit;
(3) the blasting lines and blasting switches shall be identified with a tag and the switches shall bear an inscription allowing them to be identified.
