S-2.1, r. 4 - Safety Code for the construction industry

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5.2.3. The employer who carries out work less than 30 m away from an electrical line with a voltage higher than 250,000 V shall ensure that the following requirements are respected:
(a)  refueling shall be done outside the area;
(b)  construction equipment on tires shall be equipped with an electrostatic link between the metallic part and the ground; and
(c)  during the installation or manipulation of a metal duct, fence or above ground structure, it shall be grounded every 30 m.
R.R.Q., 1981, c. S-2.1, r. 6, s. 5.2.3.