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

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479. A warning sign shall be posted at the entrance of a transformer room conveying the following information:
(1)  the words “DANGER… V”, the highest voltage being written between the 2 words, all in characters at least 25 mm (1.0 in) in height;
(2)  the measures to be taken in case of an electrical fire;
(3)  the first aid to be given to persons suffering from an electric shock.
O.C. 213-93, s. 479.