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

Full text
526. A grounding conductor may not be connected to the grounding network before the contact has been cleaned of rust, scale and paint.
This contact shall be made by means of welded, screwed, bolted or pressure terminals, clamps or grounding straps protected against any deterioration.
O.C. 213-93, s. 526.