S-2.1, r. 4 - Safety Code for the construction industry
2.11.3. Extension cords: Electrical extension cords supplying energy to any equipment or tools shall:
(a) be suspended at a minimum height of 2.4 m but sufficient to ensure a free passage; or
(b) be protected on the floor in order to avoid any damage to these conductors and to reduce risks of tripping; and
(c) be provided with a third conductor for grounding with the exception of extensions used exclusively for lighting purposes.
R.R.Q., 1981, c. S-2.1, r. 6, s. 2.11.3.