B-1.1, r. 3 - Safety Code

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303. Where users are moved in darkness inside an enclosure or in the case of an amusement ride or device completely enclosed, the enclosure must be equipped with
(1)  a smoke alarm bearing a seal of approval from Underwriters’ Laboratories of Canada (ULC) and installed in compliance with the manufacturer’s instructions. The proper working order of the smoke alarm must be checked at every assembly of a portable amusement ride or device and every month in other cases;
(2)  signs, visible from the vehicle, indicating egresses; and
(3)  an emergency lighting system of not less than 10 lx at floor level and egress signs, activated automatically when the main source of power supply is interrupted.
In addition, each egress door must bear the inscription “SORTIE” in lettering at least 25 mm high and, if locked, it must be possible to open it from the inside, by a single manoeuvre, without a key.
O.C. 363-2012, s. 1.